FLEXIBLE-HOSE EXPANSION JOINTS:

                         Flex-Hose Co., Inc

                         Flexicraft Industries

                         Metraflex Co

             PACKED SLIP EXPANSION JOINTS:

                         Adsco Manufacturing, LLC

                         Advanced Thermal Systems, Inc

                         Hyspan Precision Products, Inc

             ALIGNMENT GUIDES:

                         Flex-Hose Co., Inc

                         Flexicraft Industries

                         Flex-Weld, Inc

             METAL-CASE, LIQUID-IN-GLASS THERMOMETERS:

                         Palmer - Wahl Instruments Inc

                         Trerice Co

                         Weiss Instruments, Inc

             PLASTIC-CASE, LIQUID-IN-GLASS THERMOMETERS:

                         Ernst Co

                         Trerice Co

                         Weksler

             DUCT-TYPE, LIQUID-IN-GLASS THERMOMETERS:

                         Miljoco Corp

                         Trerice Co

                         Weiss Instruments, Inc

             DIRECT-MOUNTING, VAPOR-ACTUATED DIAL THERMOMETERS:

                         Kobold Instruments, Inc

                         Marsh Bellofram

                         Trerice Co

             REMOTE-MOUNTING, VAPOR-ACTUATED DIAL THERMOMETERS:

                         Ametek, Inc

                         Trerice Co

                         Weksler

             BIMETALLIC-ACTUATED DIAL THERMOMETERS:

                         Miljoco Corp

                         Nanamac Corporation

                         Reotemp Instrument Corporation

             THERMOWELLS:

                         Ametek, Inc

                         Noshok, Inc

                         Winters Instruments

             PRESSURE GAGES:

                         Ametek, Inc

                         Kobold Instruments, Inc

                         Marsh Bellofram

             TEST PLUGS:

                         MG Piping Products Co

                         National Meter, Inc

                         Peterson Equipment Co., Inc

             WAFER-ORIFICE FLOWMETERS:

                         ABB Inc

                         Armstrong Pumps, Inc

                         Bell & Gossett; ITT Industries

             VENTURI FLOWMETERS:

                         Armstrong Pumps, Inc

                         McCrometer, Inc

                         Preso Meters Corporation

                         Victaulic Co. of America

             TURBINE FLOWMETERS:

                         Midwest Instruments & Controls Corp

                         Onicon Incorporated

                         Venture Measurement

             VORTEX-SHEDDING FLOWMETERS:

                         Bailey-Fischer & Porter Co

                         Eastech, Inc

                         Venture Measurement

             PITOT-TUBE FLOWMETERS:

                         Taco, Inc

                         Veris Industries

             FLOW INDICATORS:

                         Brooks Instrument

                         McCrometer, Inc

                         OPW Engineered Systems

             INSERTION-TURBINE, THERMAL-ENERGY METER SYSTEMS:

                         Onicon Incorporated

                         Thermo Measurement Ltd

             INLINE-TURBINE, THERMAL-ENERGY METER SYSTEMS

                         Hoffer Flow Controls, Inc

                         Istec Corporation

             ULTRASONIC, THERMAL-ENERGY METER SYSTEMS:

                         Mesa Laboratories, Inc

             CLASS 125, BRONZE ANGLE VALVES WITH BRONZE DISC:

                         Hammond Valve

                         Milwaukee Valve Company

             CLASS 125, BRONZE ANGLE VALVES WITH NONMETALLIC DISC:

                         American Valve, Inc

                         Nibco Inc

             CHAINWHEELS

                         Babbitt Steam Specialty Co

                         Roto Hammer Industries

                         Trumbull Industries

             STEEL PIPE HANGERS AND SUPPORTS:

                         AAA Technology & Specialties Co., Inc

             FIBERGLASS PIPE HANGERS:

                         B-Line Systems, Inc

                         Unistrut Corp

                         Wesanco, Inc

             METAL FRAMING SYSTEMS:

                         Erico Michigan Hanger Co

                         Unistrut Corp

             FIBERGLASS STRUT SYSTEMS:

                         Champion Fiberglass, Inc

                         T. J. Cope

             THERMAL-HANGER SHIELD INSERTS:

                         Carpenter & Paterson, Inc

                         Erico Michigan Hanger Co

                         Rilco Manufacturing Company, Inc

             FASTENER SYSTEMS:

                         Hilti, Inc

             PLASTIC-INSULATED, SERIES-RESISTANCE HEATING CABLES:

                         Delta-Therm Corporation

                         Easy Heat Inc

                         Nuheat

             SELF-REGULATING, PARALLEL-RESISTANCE HEATING CABLES:

                         BH Thermal Corporation

                         Chromalox

                         Delta-Therm Corporation

             VIBRATION ISOLATORS:

                         Ace Mountings Co., Inc

                         Amber/Booth Company, Inc

             AIR-MOUNTING SYSTEMS:

                         California Dynamics Corporation

                         Firestone Industrial Products Company

                         Vibration Eliminator Co., Inc

             RESTRAINED VIBRATION ISOLATION ROOF-CURB RAILS:

                         Amber/Booth Company, Inc

                         California Dynamics Corporation

             VIBRATION ISOLATION EQUIPMENT BASES:

                         Amber/Booth Company, Inc

                         Kinetics Noise Control

             SEISMIC-RESTRAINT DEVICES:

                         Amber/Booth Company, Inc

                         Unistrut Corp

             CONTROL SYSTEM:

                         Honeywell International Inc.; Home & Building Control

                         Johnson Controls, Inc.; Controls Group

                         KMC Controls/Kreuter Manufacturing Company

             HVAC MAKEUP WATER SOFTENER:

                         Alamo Water Treatment

                         Rainsoft Div

             MANUAL CHEMICAL-FEED EQUIPMENT; AUTOMATIC CHEMICAL-FEED EQUIPMENT; INHIBITOR INJECTION TIMERS; PH CONTROLLER; TDS CONTROLLER; BIOCIDE FEEDER TIMER; CHEMICAL SOLUTION TANKS; CHEMICAL SOLUTION INJECTION PUMPS; CHEMICAL SOLUTION TUBING; INJECTION ASSEMBLY; OZONE-GENERATOR BIOCIDE EQUIPMENT; OZONE CONTACTORS; OZONE DETECTOR AND ALARM DEVICES; SELF-CONTAINED BREATHING APPARATUS; UV BIOCIDE EQUIPMENT; CHEMICAL TREATMENT TEST EQUIPMENT:

                         Anderson Chemical Co, Inc

                         Aqua-Chem, Inc

                         Barclay Chemical Co.; Water Management, Inc

                         Boland Trane Services

                         H-O-H Chemicals, Inc

                         Metro Group. Inc. (The); Metropolitan Refining Div

                         Nalco Company

                         Watcon, Inc

             DOUBLE-WALL RECTANGULAR DUCTS AND FITTINGS:

                         McGill AirFlow LLC

                         Sheet Metal Connectors, Inc

             SINGLE-WALL ROUND AND FLAT-OVAL DUCTS AND FITTINGS:

                         Lindab Inc

                         McGill AirFlow LLC

                         Semco Incorporated

             DOUBLE-WALL ROUND AND FLAT-OVAL DUCTS AND FITTINGS:

                         McGill AirFlow LLC

                         Semco Incorporated

                         Sheet Metal Connectors, Inc

             DUCT LINER:

                         CertainTeed Corporation; Insulation Group

                         Johns Manville

                         Owens Corning

             FIBROUS-GLASS DUCTS AND FITTINGS:

                         Johns Manville

                         Knauf Insulation

                         Owens Corning

             PHENOLIC-FOAM DUCTS AND FITTINGS:

                         Knauf Insulation

             THERMOSET FRP DUCTS AND FITTINGS:

                         McGill AirFlow LLC

                         Perry Fiberglass Products, Inc

                         Spunstrand Inc

             DOUBLE-WALL, INSULATED, PRESSURIZED EQUIPMENT CASING:

                         Acoustical Surfaces, Inc

                         Semco Incorporated

                         Vibro-Acoustics

             FIBROUS-GLASS CASING LINER:

                         CertainTeed Corporation; Insulation Group

                         Johns Manville

                         Owens Corning

             FLEXIBLE-ELASTOMERIC CASING LINER:

                         Aeroflex USA Inc

                         Armacell LLC

             NATURAL-FIBER CASING LINER:

                         Bonded Logic, Inc

                         Reflectix Inc

             BACKDRAFT AND PRESSURE RELIEF DAMPERS:

                         Air Balance Inc

                         NCA Manufacturing, Inc

                         Semco Incorporated

             BAROMETRIC RELIEF DAMPERS:

                         Air Balance Inc

                         NCA Manufacturing, Inc

                         Vent Products Company, Inc

             STANDARD, STEEL, MANUAL VOLUME DAMPERS:

                         Air Balance Inc

                         American Warming and Ventilating

                         Trox USA Inc

             STANDARD, ALUMINUM, MANUAL VOLUME DAMPERS:

                         Air Balance Inc

                         Ruskin Company

                         Vent Products Company, Inc

             LOW-LEAKAGE, STEEL, MANUAL VOLUME DAMPERS:

                         Flexmaster U.S.A., Inc

                         McGill AirFlow LLC

                         Metalaire, Inc

             LOW-LEAKAGE, ALUMINUM, MANUAL VOLUME DAMPERS:

                         McGill AirFlow LLC

                         Metalaire, Inc

                         Trox USA Inc

             CONTROL DAMPERS:

                         American Warming and Ventilating; a division of Mestek, Inc

                         Ruskin Company

                         Vent Products Company, Inc

             FIRE DAMPERS:

                         Air Balance Inc

                         Arrow United Industries

             CEILING DAMPERS:

                         Cesco Products

                         McGill AirFlow LLC

                         Nailor Industries Inc

             SMOKE DAMPERS:

                         Air Balance Inc

                         Greenheck Fan Corporation

                         Ruskin Company

             COMBINATION FIRE AND SMOKE DAMPERS:

                         Cesco Products

                         Greenheck Fan Corporation

                         Nailor Industries Inc

             CORRIDOR DAMPERS:

                         Air Balance Inc

                         Cesco Products

                         Ruskin Company

             TUBEAXIAL FANS:

                         Acme Engineering & Mfg. Corp

                         Aerovent

                         Trane

             VANEAXIAL FANS:

                         Airmaster Fan Co

                         American Fan Company

                         Trane

             MIXED-FLOW FANS:

                         Loren Cook Company

                         Greenheck

             AIRFOIL CENTRIFUGAL FANS:

                         ABB Fan Group North America

                         Howden Fan Co

                         Loren Cook Company

             BACKWARD-INCLINED CENTRIFUGAL FANS:

                         ABB Fan Group North America

                         Loren Cook Company

                         Trane

             FORWARD-CURVED CENTRIFUGAL FANS:

                         ABB Fan Group North America

                         Howden Fan Co

                         Loren Cook Company

             PLENUM FANS:

                         Loren Cook Company

                         Trane

             PLUG FANS:

                         Loren Cook Company

                         Trane

             UTILITY SET FANS:

                         Loren Cook Company

                         Trane

             CENTRIFUGAL ROOF VENTILATORS:

                         Loren Cook Company

                         NuTone Inc

                         Quietaire Corporation

             AXIAL ROOF VENTILATORS:

                         Acme Engineering & Mfg. Corp

             UPBLAST PROPELLER ROOF EXHAUST FANS:

                         Loren Cook Company

             CENTRIFUGAL WALL VENTILATORS:

                         Jenco Fan

                         Loren Cook Company

             CEILING-MOUNTING VENTILATORS:

                         American Coolair Corp

                         Loren Cook Company

             IN-LINE CENTRIFUGAL FANS:

                         Hartzell Fan, Inc

                         Loren Cook Company

                         Quietaire Corporation

             PROPELLER FANS:

                         Acme Engineering & Mfg. Corp

                         Loren Cook Company

             AIR CURTAINS:

                         Loren Cook Company

                         TMI Inc

             BYPASS, SINGLE-DUCT AIR TERMINAL UNITS:

                         Carnes

                         Carrier Corporation

                         Titus

             DUAL-DUCT AIR TERMINAL UNITS:

                         Titus

                         Trane

                         Tuttle & Bailey

             PARALLEL FAN-POWERED AIR TERMINAL UNITS:

                         Titus

                         Trane

                         Tuttle & Bailey

             SERIES FAN-POWERED AIR TERMINAL UNITS:

                         Titus

                         Trane

                         Tuttle & Bailey

             INDUCTION AIR TERMINAL UNITS:

                         Price Industries

                         Tuttle & Bailey

             SHUTOFF, SINGLE-DUCT AIR TERMINAL UNITS:

                         Titus

                         Trane

                         Warren Technology

             DIFFUSER-TYPE AIR TERMINAL UNITS:

                         Acutherm

                         Rickard Air Diffusion

                         Warren Technology

             CEILING DIFFUSERS:

                         Price Industries

                         Titus

                         Tuttle & Bailey

             RECTANGULAR AND SQUARE CEILING:

                         Nailor Industries Inc

                         Titus

                         Tuttle & Bailey

             PERFORATED DIFFUSER:

                         Titus

                         Tuttle & Bailey

                         Warren Technology

             CEILING LINEAR SLOT OUTLETS:

                         Nailor Industries Inc

                         Tuttle & Bailey

                         Warren Technology

             LINEAR SLOT DIFFUSER:

                         Nailor Industries Inc

                         Price Industries

                         Tuttle & Bailey

             CEILING-INTEGRAL CONTINUOUS DIFFUSER:

                         Krueger

                         Metalaire, Inc

                         Tuttle & Bailey

             LIGHT TROFFER DIFFUSER:

                         Anemostat Products

                         Titus

                         Tuttle & Bailey

             ROUND INDUCTION DIFFUSERS:

                         Metalaire, Inc

                         Nailor Industries Inc

                         Titus

             LINEAR FLOOR DIFFUSER PLENUMS:

                         Metalaire, Inc

                         Price Industries

                         Titus

             HIGH-CAPACITY DIFFUSERS:

                         Titus

                         Tuttle & Bailey

             MODULAR CORE SUPPLY GRILLES:

                         Price Industries

                         Titus

                         Tuttle & Bailey

             FLEXIBLE DIFFUSION OUTLETS:

                         DuctSox Corp

             REGISTERS AND GRILLES:

                         A-J Manufacturing Co., Inc

                         Titus

                         Tuttle & Bailey

             ADJUSTABLE BAR GRILLE:

                         Krueger

                         Titus

                         Tuttle & Bailey

             SECURITY REGISTER:

                         Carnes

                         Krueger

                         Tuttle & Bailey            

              SECURITY GRILLE:

                         Carnes

                         Titus

                         Tuttle & Bailey

             FIXED FACE REGISTER:

                         Price Industries

                         Titus

                         Tuttle & Bailey

             FIXED FACE GRILLE:

                         Price Industries

                         Titus

                         Tuttle & Bailey

             LINEAR BAR GRILLE:

                         Price Industries

                         Titus

                         Tuttle & Bailey

             LOUVER PENTHOUSES:

                         Acme Engineering & Mfg. Corp

                         Aerovent

                         Carnes

             ROOF HOODS:

                         Carnes

                         JencoFan

                         Loren Cook Company

             TYPE I EXHAUST HOOD:

                         Grease Master

                         Greenheck

                         Halton Company

            TYPE II EXHAUST HOOD:

                         Greenheck

                         Halton Company

            WET-CHEMICAL FIRE-SUPPRESSION SYSTEM:

                         Badger Fire Protection

                         Kidde Fire Systems

                         Pyro Chem

            AIR FILTERS, ELECTROSTATIC AIR CLEANERS, AND FILTER-HOLDING SYSTEMS:

                         AAF International

                         Airguard Industries, Inc

            FILTER GAGES:

                         Airguard Industries, Inc

                         Dwyer Instruments, Inc

            CHIMNEY LINERS:

                         American Metal Products

                         Deflect-O Corp

                         Dura-Vent Co

            TYPE B AND BW VENTS:

                         American Metal Products

                         Cleaver-Brooks

                         Tru-Flex Metal Hose LLC

            TYPE L VENTS:

                         Famco

                         Dura-Vent Co

                         Tru-Flex Metal Hose LLC

            SPECIAL GAS VENTS:

                         Heat-Fab, Inc

                         Metal-Fab, Inc

                         Selkirk Inc

            BUILDING HEATING APPLIANCE CHIMNEYS:

                         American Metal Products

                         Famco

                         Van-Packer Company, Inc

            GREASE DUCTS:

                         American Metal Products

                         Famco

                         Van-Packer Company, Inc

            DRAFT INDUCER FANS:

                         Tutco, Inc

            VENTURI-DRAFT INDUCER FANS:

                         Quickdraft

            MECHANICAL-DRAFT VENT FANS:

                         Tutco, Inc

            VENT EXHAUST FANS:

                         Exhausto, Inc

                         Field Controls L.L.C

                         Tjernlund Products, Inc

            BAROMETRIC DAMPERS:

                         Bramec Corporation

                         Tutco, Inc

            VENT DAMPERS:

                         Field Controls L.L.C

                         Johnson Controls, Inc

            COMBUSTION AIR FANS:

                         Exhausto, Inc

                         Field Controls L.L.C

                         Tjernlund Products, Inc

            ELECTRIC BOILERS:

                         Acme Engineering Prod

                         PVI Industries, LLC

                         Reimers Electra Steam, Inc

            CONDENSING BOILERS:

                         Fulton

                         Gasmaster Industries Incorporated

                         Hydrotherm, Inc

            CAST IRON BOILERS:

                         Burnham

                         Crown Boiler Co

                         Smith Cast Iron Boilers

            FINNED WATER TUBE BOILERS:

                         Ajax Boiler Inc

                         Reco USA

                         A. O. Smith

            STEEL OR FLEXIBLE WATER TUBE BOILERS:

                         Bryan Boilers

                         Cleaver-Brooks

                         Parker Boiler

            FIRE TUBE BOILERS:

                         Patterson-Kelley

                         Precision Boilers

                         Hurst Boiler & Welding Company, Inc

            BOILER FEEDWATER UNITS:

                         Flotronics, Inc.

                         Roth Pump Company

                         Superior Boiler Works, Inc

            BOILER FEEDWATER UNIT WITH VACUUM PRODUCER:

                         Shippensburg Pump Co

                         Skidmore

            DEAERATORS:

                         AESYS Technologies, LLC

                         Ambassador Heat Transfer

                         PVI Industries, LLC

            GAS-FIRED FURNACES, NONCONDENSING:

                         Adams Manufacturing Company

                         Amana

                         Trane

            GAS-FIRED FURNACES, CONDENSING:

                         Adams Manufacturing Company

                         Trane

                         York

            OIL FIRED FURNACES:

                         Adams Manufacturing Company

                         Rheem

                         Ruud

            FUEL FIRED DUCT HEATERS:

                         Lennox

                         Reznor

                         Sterling HVAC Products

            TUBULAR INFRARED HEATERS:

                         Calcana Industries Ltd

                         Solaronics

                         Sterling HVAC Products

            HIGH INTENSITY INFRARED HEATERS:

                         Reznor

                         Roberts Gordon

                         Solaronics

            GAS-FIRED UNIT HEATERS:

                         Lennox

                         Reznor

                         Sterling HVAC Products

            OIL-FIRED UNIT HEATERS:

                         Modine

                         Reznor

                         Sterling HVAC Products

            SHELL AND TUBE HEAT EXCHANGERS:

                         API Heat Transfer Inc

                         Armstrong Pumps, Inc

                         Taco, Inc.

            GASKETED PLATE HEAT EXCHANGERS:

                         Armstrong Pumps, Inc

                         Bell & Gossett

                         Polaris Plate Heat Exchangers

            BRAZED PLATE HEAT EXCHANGERS:

                         Armstrong Pumps, Inc

                         Bell & Gossett

                         Mueller

            CONDENSING UNITS, AIR COOLED, 1 TO 5 TONS:

                         Carrier

                         Lennox

                         Trane

                         York

            CONDENSING UNITS, AIR COOLED, 6 TO 120 TONS:

                         Carrier

                         Lennox

                         York

            CONDENSING UNITS, WATER COOLED:

                         Carrier

                         Trane

                         York

            AIR-COOLED REFRIGERANT CONDENSERS:

                         Carrier

                         Daikin McQuay

                         Trane

            FORCED-DRAFT EVAPORATIVE REFRIGERANT CONDENSERS:

                         Baltimore Aircoil Company

                         Evapco

                         Recold

            INDUCED DRAFT EVAPORATIVE REFRIGERANT CONDENSERS:

                         Baltimore Aircoil Company

                         Evapco

                         Recold

            FORCED DRAFT EVAPORATIVE REFRIGERANT CONDENSERS:

                         Baltimore Aircoil Company

                         Evapco

                         Recold

            INDUCED DRAFT EVAPORATIVE REFRIGERANT CONDENSERS:

                         Baltimore Aircoil Company

                         Evapco

                         Recold

            CENTRIFUGAL WATER CHILLERS:

                         Carrier

                         Trane

                         York

            PACKAGED WATER COOLED WATER CHILLERS:

                         Carrier

                         Daikin McQuay

            PACKAGED AIR COOLED WATER CHILLERS:

                         Carrier

            PACKAGED WATER COOLED WATER CHILLERS:

                         Daikin McQuay

                         Trane

            PACKAGED AIR COOLED WATER CHILLERS:

                         Carrier

                         Trane

                         York

            PACKAGED, WATER COOLED, SINGLE COMPRESSOR CHILLERS:

                         Carrier

                         Trane

                         York

            PACKAGED, WATER COOLED, MULTIPLE COMPRESSOR CHILLERS:

                         Carrier

                         Dunham-Bush

                         York

            PACKAGED, AIR COOLED CHILLERS:

                         Dunham-Bush

                         Daikin McQuay

                         York

            CLOSED CIRCUIT, FORCED DRAFT, COUNTERFLOW COOLING TOWERS:

                         Baltimore Aircoil Company

                         Delta Cooling Towers, Inc

                         Recold

            CLOSED CIRCUIT, INDUCED DRAFT, COMBINED-FLOW COOLING TOWERS:

                         Baltimore Aircoil Company

                         Marley Cooling Technologies

            CLOSED CIRCUIT, INDUCED DRAFT, COUNTERFLOW COOLING TOWERS

                         Evapco

                         Recold

            OPEN CIRCUIT, FORCED DRAFT, COUNTERFLOW COOLING TOWERS:

                         Delta Cooling Towers, Inc

                         Evapco

                         Tower Tech, Inc

            OPEN CIRCUIT, INDUCED DRAFT, COUNTERFLOW COOLING TOWERS:

                         Amcot Cooling Tower Corp

                         Delta Cooling Towers, Inc

                         Evapco

                         Protec Cooling Towers, Inc

                         Recold

            OPEN CIRCUIT, INDUCED DRAFT, CROSSFLOW COOLING TOWERS:

                         Amcot Cooling Tower Corp

                         Baltimore Aircoil Company

                         Marley Cooling Technologies

            HEAT WHEELS:

                         Advanced Thermal Technologies

                         Loren Cook Company

                         Trane

            HEAT-PIPE HEAT EXCHANGERS:

                         Applied Air

                         Heat Pipe Technology, Inc

            FIXED-PLATE SENSIBLE HEAT EXCHANGERS:

                         RenewAire

                         United Air Specialists, Inc

            FIXED-PLATE TOTAL HEAT EXCHANGERS:

                         RenewAire

            PACKAGED ENERGY RECOVERY UNITS:

                         Loren Cook Company

                         Trane

            MODULAR INDOOR CENTRAL STATION AIRHANDLING UNITS:

                         Carrier

                         Dunham-Bush

                         York

            INDOOR INDIRECT FUEL FIRED HEATING AND VENTILATING UNITS:

                         Captiveaire

                         Reznor

                         Trane

            INDOOR, DIRECT GAS FIRED HEATING AND VENTILATING UNITS:

                         Greenheck

                         Reznor

                         Titan Air Incorporated

            PACKAGED, OUTDOOR, CENTRAL STATION AIR HANDLING UNITS:

                         Carrier

                         Lennox

                         York

            PACKAGED, OUTDOOR, HEATING AND COOLING MAKEUP AIR CONDITIONERS:

                         Addison

                         Reznor

            PACKAGED TERMINAL AIR CONDITIONERS:

                         Carrier

                         ClimateMaster, Inc

            SELF CONTAINED AIR-CONDITIONERS - LARGER THAN 15 TONS:

                         Carrier

                         Daikin McQuay

                         Trane

            WATER-COOLED, SELF-CONTAINED AIR-CONDITIONERS-15 TONS AND SMALLER:

                         Carrier

                         Mepco

                         USA Coil & Air Inc

            REMOTE AIR-COOLED, SELF-CONTAINED AIR-CONDITIONERS - 15 TONS AND SMALLER:

                         Carrier

                         Daikin McQuay.

                         USA Coil & Air Inc

            INTEGRAL AIR-COOLED, SELF-CONTAINED AIR-CONDITIONERS - 15 TONS AND SMALLER:

                         Daikin McQuay

                         Trane

            INTEGRAL AIR-COOLED, WALL-MOUNT SELF-CONTAINED AIR-CONDITIONERS - 15 TONS AND SMALLER:

                         Bard

            COMPUTER-ROOM FLOOR-MOUNTED UNITS - 6 TONS AND LARGER:

                         Carrier

                         Daikin McQuay

                         Trane

            COMPUTER-ROOM FLOOR-MOUNTED UNITS - 5 TONS AND SMALLER:

                         Carrier

                         Daikin McQuay

                         Trane

            COMPUTER-ROOM CEILING-MOUNTED UNITS:

                         Carrier

                         Compu-Aire, Inc

                         Data Aire Inc

            COMPUTER-ROOM ONSOLE UNITS:

                         Carrier

                         Compu-Aire, Inc

                         Data Aire Inc

            SPLIT-SYSTEM AIR-CONDITIONERS:

                         Lennox

            CONCEALED WATER-SOURCE HEAT PUMPS - 6 TONS AND SMALLER:

                         Addison

                         Carrier

                         Trane

            CONCEALED WATER-SOURCE HEAT PUMPS - LARGER THAN 6 TONS:

                         Addison

                         Trane

                         Water Furnace International, Inc

            VERTICAL-STACK WATER-SOURCE HEAT PUMPS:

                         Climate Master, Inc

                         Tranez

            ROOFTOP WATER-SOURCE HEAT PUMPS:

                         Addison

                         Carrier

                         Climate Master, Inc

            EXPOSED, CONSOLE WATER-SOURCE HEAT PUMPS:

                         Carrier

                         Mammoth Inc

                         Water Furnace International, Inc

            UNIT VENTILATOR WATER-SOURCE HEAT PUMPS:

                         Trane

            CONCEALED WATER-SOURCE HEAT PUMPS - 6 TONS AND SMALLER:

                         Carrier

                         Climate Master, Inc

                         Water Furnace International, Inc

            CONCEALED WATER-SOURCE HEAT PUMPS - LARGER THAN 6 TONS:

                         Carrier

                         Climate Master, Inc

                         Trane

            VERTICAL-STACK WATER-SOURCE HEAT PUMPS:

                         Mammoth Inc

                         Daikin McQuay

                         Trane

            EXPOSED, CONSOLE WATER-SOURCE HEAT PUMPS:

                         Carrier

                         Trane

                         Water Furnace International, Inc

            UNIT VENTILATOR WATER-SOURCE HEAT PUMPS:

                         Trane

            WATER COILS:

                         Aerofin Corporation

                         Carrier

                         Dunham-Bush

                         Trane

            STEAM COILS:

                         Aerofin Corporation

                         Carrier

                         Dunham-Bush

                         Trane

            REFRIGERANT COILS:

                         Aerofin Corporation

                         Carrier

                         Dunham-Bush

                         Trane

            ELECTRIC COILS:

                         Dunham-Bush

                         Indeeco

                         Trane

            FAN-COIL UNITS:

                         Airtherm

                         First Co

                         USA Coil & Air Inc

                         York

            DUCTED FAN-COIL UNITS:

                         Carrier

                         First Co

                         IEC.

                         Trane

            UNIT VENTILATORS:

                         Carrier

                         Daikin McQuay

                         Trane

            ELECTRIC BASEBOARD RADIATORS:

                         Chromalox

            HOT-WATER OR STEAM BASEBOARD RADIATORS:

                         Embassy Industries, Inc

                         Rosemex

                         Slant Fin

            ELECTRIC FINNED-TUBE RADIATORS:

                         Markel Products

                         Trane

            HOT-WATER OR STEAM FINNED-TUBE RADIATORS:

                         Embassy Industries, Inc

                         Rittling

                         Trane

            ELECTRIC CONVECTORS:

                         Chromalox

                         Indeeco

            HOT-WATER OR STEAM CONVECTORS:

                         Engineered Air

                         Rosemex

                         Trane

            FLAT-PIPE STEEL RADIATORS:

                         Embassy Industries, Inc

                         Runtal North America, Inc

            CABINET UNIT HEATERS:

                         Airtherm

                         Carrier

                         Chromalox

                         Dunham-Bush

            PROPELLER UNIT HEATERS:

                         Airtherm

                         Daikin McQuay

                         Trane

            WALL AND CEILING HEATERS:

                         Chromalox

                         Indeeco

                         Trane

            MINERAL-INSULATED, SERIES-RESISTANCE HEATING CABLES:

                         Chromalox

                         Nelson Heat Trace

                         Trasor Corp

                         Watts Radiant Inc.

            SELF-REGULATING, PARALLEL-RESISTANCE HEATING CABLES:

                         Nelson Heat Trace

                         Pyrotenax

                         Thermon Manufacturing Co

            PREFABRICATED RADIANT-HEATING ELECTRIC PANELS:

                         Berko Electric Heating

                         Markel Products

                         SSHC, Inc

            WATER-PRESSURE ATOMIZING HUMIDIFIERS:

                         Carel USA, LLC

                         Herrmidifier

                         Mee Industries Inc

            COMPRESSED-AIR ATOMIZING HUMIDIFIERS:

                         Carel USA, LLC

                         Herrmidifier

                         Mee Industries Inc

            STEAM-INJECTION HUMIDIFIERS:

                         Armstrong International, Inc

                         Herrmidifier

                         Pure Humidifier Company

            SELF-CONTAINED HUMIDIFIERS:

                         Armstrong International, Inc

                         Hygromatik

                         Nortec Industries Inc

            HEATED-PAN HUMIDIFIERS:

                         Armstrong International, Inc

                         Dri-Steem Humidifier Company

                         Pure Humidifier Company

            HEAT-EXCHANGER HUMIDIFIERS:

                         Armstrong International, Inc

                         Nortec Industries Inc

                         Pure Humidifier Company

            DESICCANT DEHUMIDIFICATION UNITS:

                         Kathabar Inc

                         Octagon Air Systems

            REFRIGERATION DEHUMIDIFICATION UNITS:

                         DryAire Systems Corp

                         Nautica Dehumidifiers, Inc

            FLEXIBLE CONNECTORS:

                         Duro Dyne

                         Ventfabrics, Inc

            FLEXIBLE DUCTS:

                         Ductmate Industries, Inc

                         Flexmaster U.S.A., Inc

                         Hart & Cooley, Inc

            DIRECT-FIRED ABSORPTION WATER CHILLERS:

                         Carrier

                         Trane

                         York

            INDIRECT-FIRED ABSORPTION WATER CHILLERS:

                         Carrier

                         Trane

                         York