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Industrial Equipment, MRO

HVAC

HVAC Article

HVAC (pronounced either "H-V-A-C" or, occasionally, "aitch-vak") is an initialism/acronym that stands for "heating, ventilation, and air conditioning". HVAC is sometimes referred to as "climate control" and is particularly important in the design of medium to large industrial and office buildings such as sky scrapers and in marine environments such as aquariums, where humidity and temperature must all be closely regulated whilst maintaining safe and healthy conditions within. In certain regions (e.g., UK) the term "Building Services" is also used, but may also include plumbing and electrical systems. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilation is dropped as HACR (such as the designation of HACR-rated circuit breakers).

Heating, ventilation, and air conditioning is based on the basic principles of thermodynamics, fluid mechanics, and heat transfer, and to inventions and discoveries made by Michael Faraday, Willis Carrier, Reuben Trane, James Joule, William Rankine, Sadi Carnot, and many others. The invention of the components of HVAC systems goes hand-in-hand with the industrial revolution, and new methods of modernization, higher efficiency, and system control are constantly introduced by companies and inventors all over the world.

The three functions of heating, ventilation, and air-conditioning are closely interrelated. All seek to provide thermal comfort, acceptable indoor air quality, and reasonable installation, operation, and maintenance costs. HVAC systems can provide ventilation, reduce air infiltration, and maintain pressure relationships between spaces. How air is delivered to, and removed from spaces is known as room air distribution.

HVAC Items

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Honeywell Q682A 1038 subbase for T8082A thermostat

$5.00
Honeywell thermostat 8000

$71.00
Ritchie Yellow Jacket GAS PRESSURE TEST KIT 78060 HVAC

$19.99
A/C MANIFOLD GAUGE SET A C R134a W/ CARRYING CASE

$0.99
Halogen Refrigerant Freon Leak Detector AC/HVAC/R Tool

$69.95
Vaneaxial fan Twin City 28B5 , 7.5 hp unused

$1950.00
Dayton Shaded Pole Blower 1C982

$10.00
Halogen Gas Refrigerant CFC HFC Leak Detector V2T

$24.99
4-Inch Inline Duct Fan Centrifugal Hydroponic Exhaust

$99.99
YELLOW JACKET TEST AND CHARGING MANIFOLD R22 R12 R502

$19.95
Honeywell S8910U Ignition Module (New)

$25.00
Mint UEI C100A Combustion Analyzer with HP IR printer

$250.00
12 Copeland Compressor mounting hardware Refrigeration

$18.99
LeakCheck Refrigerant Halogen Leak Detector HVAC CFC

$39.99
TRANE TRACER PROGRAMMABLE CONTROL MODULE (PCM)

$75.00
Modine High Efficiency II Heater, 200,000 BTU, nat. gas

$25.00
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC

$169.95
24X10 HVAC VENTS, REGISTER, DIFFUSER

$10.00
FIREYE E100 FLAME-MONITOR

$149.00
Industrial Carpet/Floor Blower Dryer Fan

$46.00
SIEMENS OPENAIR ACTUATOR GLB131.1P PLENUM CABLE NEW

$69.95
BRAND NEW!! Honeywell Zone Valve V8043 F 1036

$55.00
DUPONT FREON 15 LB R-22 R22 REFRIGERANT 22 WITH BOX

$65.00
COMPRESSOR FREON HVAC PUMP

$218.00
Supco Digital Vacuum Gauge VG64 HVAC

$66.00
Carrier Carlyle Compressor Service Guide, HVAC - New

$15.90
New Igloo Truck Refrigeration Unit Mod#TRM-14S NIB

$1200.00
Manifold Gauge 5'High Pressure Hose R407 R134A R404 R22

$20.00
Rheem Classic 3Ton AC and Air Handler

$500.00
NEW Aluminum HVAC Wall Vent Greenhouse Damper 44" x 48"

$49.99
HONEYWELL SENSING AND CONTROL MODEL53, 060-0239-04-13

$15.00
Dwyer Magnehelic Model 2004 Gauge 0-4.0" water

$6.50
R-410A REFRIGERANT - 25 LB

$122.50
2 Cans Interdynamics R-12 R12 Refrigerant AC Older Cars

$62.00
Honeywell XL15C W7760C LonWorks LonTalk Lon Controller

$100.00
EXHAUST FAN Commercial - Direct Drive - 16" - 1/4 Hp

$336.00
Honeywell L404 Pressuretrol

$31.00
Matsushita R22 rotary AC compressor

$24.99
COMPRESSOR FREON HVAC PUMP REFRIDGERENT COPELAND 3 PH

$238.00
A/C MANIFOLD GAUGE SET A C R134a

$15.57
WHOLE HOUSE FAN - 30" - 1/2 Hp - 115V - 6,900 CFM

$511.00
2-Stage Rotary Deep Vacuum Pump 29.92"Hg 1/4HP AC/HVAC

$119.95
Electronic Refrigerant Charging Scale

$31.00
Honeywell L404 Pressuretrol

$31.00
Bryant Heat Pump Air Conditioner

$750.00
HONEYWELL VGR8345M UNIVERSAL GAS CONTROL NEW IN BOX

$38.50
Annie Analyzer Hermetic refrigeration

$51.00
contactor 2 pole 40 amp 208-240 volt coil

$7.50
8-Inch Inline Duct Fan Centrifugal Hydroponic Exhaust

$149.99
Halogen Refrigerant Leak Detector HVAC/R Tool New Model

$99.75
HVAC Air Conditioning * Heating Ventilation 19 books CD

$0.01
(7) LOT WHITE-RODGERS F19-0104 ZONE VALVE OPERATOR 24V

$24.99
Sporlan Catch All C-303 Filter Drier

$5.99
NEW Aluminum HVAC Heating Cooling Control Vent 30"x30"

$49.99
A/C System Wet Switch- Flood Detector

$15.00
HVAC R-410A Interactive Training CD & 608 CD EPA

$25.00
TRANE TRACER PROGRAMMABLE CONTROL MODULE (PCM)

$75.00
New. DAYTON 1WDC1 Exhaust Fan , 30 INCH Framed, NIB

$97.00
TIF Instruments Freon Leak Tester - "electronic sniffer

$31.00
Heating Coil Integral face , L J Wing , B-36

$450.00
New Alco Controls Thermo Expansion Valves 1 1/2 Ton

$9.95
RITCHIE YELLOW JACKET Refrigeration Charging Hose NEW

$21.50
Honeywell RM7800 Series burner control RM7824 , NEW

$90.00
Relay Overload Start Capacitor Combination- 3 n' 1

$15.00
White Rodgers Direct Spark Ignition Control 50D21

$99.00
DOUBLE STAGE VACUUM PUMP 8.5 CFM - NEW

$202.50
Taco Circulator 007 -F5

$32.09
12x12 HVAC VENTS, REGISTER, DIFFUSER

$10.00
NIB BASYS CONTROLS ACCESSORY TX1602 TRANSMITTER

$5.99
Honeywell thermostat 8000

$56.00
Large 2 oz Compressor Oil/Dye Screw-in Injector AC/HVAC

$57.75
5-Inch Inline Duct Fan Centrifugal Hydroponic Exhaust

$109.99
Vortex Inline 6" Exhaust Fan , VTX600, 449 CFM, No Res!

$102.50
Dwyer Magnehelic Gauge 0-5" water

$10.50
YELLOW JACKET MANIFOLD, BIG FACE GAUGES, LONG HOSES

$50.00
New Automatic Halogen Refrigerant Freon Leak Detector

$37.99
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC

$165.95
Watts 2" Pressure relief valve

$75.00
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe

$2.95
Honeywell Tradeline V8043 E 1012 Motorized Valve NEW

$17.28
Air Brush/Flush Tool Kit 5-ft Hose w/Gun Assembly HVAC

$35.95
Geophone Heath Leak Detector Locator

$117.50
Robinair air conditioner vacuum pump

$152.50
FORANE 408A - 24 LB TANK

$102.50
NEW!! FlowPro Industrial Pedestal Fan-30"

$189.95
60" HVAC A-C Refrigeration Charging Hoses RYB NEW

$21.95
4X12 HVAC VENT, REGISTER, DIFFUSER

$5.00
FREEZER PRESSURE SWITCH, ASCO PG16A NIB

$39.95
HVAC Air Conditioning Heating Ventilation 19 Manual CD

$0.98
NIB JOHNSON CONTROLS T-4002-203 THERMOSTAT

$9.99
FIREYE E300 EXPANSION MODULE

$59.00
EMERSON BLOWER DIRECT DRIVE MOTOR

$21.99
Halogen Refrigerant Leak Detector Air Pump AC/HVAC Tool

$26.00
CLEAVER BROOKS HAWK KEYBOARD DISPLAY MODULE 833-2419

$649.99
10X20 HVAC VENTS, REGISTER, DIFFUSER

$10.00
Fireye Pressure Sensor

$39.99
New RECHI Air Conditioner Compressor 5238 BTU

$10.53
Boiler Furnace Heat Oil Gas Coal HVAC 19book CD Library

$0.01
DWYER MAGNEHELIC PRESS GAUGE INSTALL KIT

$8.00