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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 Modutrol Motor M204A27DS4
$0.99
WEG 1/3 HP Condenser Fan Motor 115-208/230V 1 Phase NIB
$49.99
12pcs. SPORLAN RPE-48-BD SUCTION FILTERS ,NIB
$25.00
A/C,SPLIT SYSTEM WITHOUT DUCT ,12.3 MBtuH,115v
$899.95
MCDONNELL & MILLER RB-24 24V LOW WATER CUTOFF 144685
$69.95
NEW HVAC PARTS! Heatcraft Interlink 5008TS Motor (4
$31.00
WATER HEATER FROM THE WOOD STOVE TO HEAT THE HOUSE
$9.99
COPLEAND COPELAMETIC CONDENSER WSWM-0075-TAC-001
$299.00
Siebe Low Temperature Manual reset Control Freeze stat
$9.77
UEI MODEL DAFME DIGITIAL AIR FLOW METER ( NEW IN BOX)
$66.00
25 NEW COPPER FITTINGS 7/8"OD 3/4"ID FEMALE ADAPTERS
$39.98
NEW HVAC PARTS! 230 Volt 50 Watt Electric Motor (11
$33.00
NEW HVAC PARTS! 115 Volt 35 Watt Electric Motor (1
$19.99
A.O. SMITH C661V1 3/4 HP Condenser Fan Motor 230/460V
$79.99
Yellow Jacket Flare and Swage Brand New
$46.00
Climatrol Under Duct Power Humidifier
$0.99
Lot of 2 Air Filter Carbon HAZMAT Solvent fume welding?
$588.00
NEW HVAC PARTS! Heatcraft Interlink 5008SS Motor (3
$22.01
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC
$159.95
BOILER HOT WATER HEATING SYSTEM WOOD GAS OIL COMBINED
$9.99
Liebert DELUXE SYSTEM 3 15 TON Downflow Econocoil
$12500.00
Industrial Fan, 48,000 CFM, Blower, Dryer
$1000.00
brand new digital clamp clamp-on meter multimeter
$7.99
HVAC Tool Set - 27 Pieces with Bag
$500.00
Universal 150FAS 150,000 BTU Propane Blower Heater Used
$60.00
NEW NORDYNE IGNITOR KIT 208/230 V FURNACE HEATER
$9.95
BELIMO DAMPER ACTUATOR AF-24 MFT US 133 in-lbs
$34.00
NEW HVAC PARTS! 115 Volt 50 Watt Electric Motor (5
$21.99
Bell&Gossett Iron Body Red Fox Circulating pump #NRF 22
$43.01
60KW Nuptronic SK300 Humidifier Sterile Steam microproc
$750.00
30KW Nuptronic SK300 Humidifier Sterile Steam microproc
$600.00
HONEYWELL MODEL S7800A1001 KEYBOARD DISPLAY MODULE
$75.00
AIR CONDITIONING GE BLOWER FAN MOTOR 1/3 HP HVAC
$27.00
Malco 14in metal snips HAVC
$26.95
Macon Controls #10857 Radiator Valve
$14.85
8 inch Stainless Steel chimney flue with cleanout
$0.99
Halogen Gas HFC CFC Refrigerant Leak Checker Detector
$29.95
M 20 Plate Copper Brazed Heat Exchanger Water Beer Wort
$99.00
AIR CONDITIONING GE BLOWER FAN MOTOR 1/3 HP HVAC
$27.00
Ultramet Capacitor Turbo 200 mini HVAC-R Heat Pump
$7.95
Combustion Analyzer - Bacharach Model 40, Complete
$280.97
BOILER , NATURAL GAS MADE BY HYDROTHERM
$1895.95
Sensor Tip Halogen Refrigerant Freon Leak Detector Tif
$24.95
BELIMO DAMPER ACTUATOR AF-24 MFT US 133 in-lbs
$34.00
TRANE DEFROST RELAY FOR HEAT PUMPS
$10.00
Rudd/Rheem furnace board ST9101A 1014 or 47-22827-03
$20.00
Fasco Squirrel Cage Fan Blower 110 115 Volt 2930 RPM
$37.88
Direct drive fan- fan/blower motor
$45.00
NEW HVAC Parts! Johnson P70AA-118C Fan Cycle Control
$26.00
Honeywell Tradeline Programmable Thermostat T7350D 1008
$30.55
3 Ton Chiller Process Air Cooled Chiller 5 7 10 12 15
$5190.00
HONEYWELL INTERMITTENT IGNITION OIL PRIMARY
$9.95
TRANE DEFROST TIMER FOR HEAT PUMP
$10.00
HONEYWELL L4080B 1352 HI-LIMIT AQUASTAT NEW NIB
$20.00
WHITE-RODGERS 36C03 400 MANIFOLD GAS VALVE
$19.95
Ultramet Capacitor Turbo 200 HVAC-R Heat Pump AC
$16.05
Halogen Refrigerant Freon Leak Detector HVAC R22/R134A
$67.75
Robinson-Halpern-D/P Xmitter- 0 - 1.0" H2O, 4-20ma Out
$9.99
HVAC 2008 EPA/Freon Certification Manual w/ Tests
$2.00
NEW GAS BALL VALVES 1/2" FPT x 1/2" FPT LOT OF 10
$36.98
A.O. Smith FE1056SB New In Box
$29.99
Carrier 30 Ton Chiller, Model 30GTN090-62OEQ, 2002
$9500.00
SPORLAN OVE-30-CP100 Thermostatic Expansion Valve R22
$14.99
LENNOX 20 TON ROOF TOP UNIT
$1.00
HONEYWELL UDC 200H-2-000-1D0000-0 MINI PRO CONTROLLER
$25.00
Halogen Gas CFC HFC Refrigerant Leak Detector Checker
$29.59
WATER HEATER FROM THE WOOD STOVE TO HEAT THE HOUSE
$9.99
NEW Carrier Bryant Circuit Control Board HH84AA020
$39.00
Yellow Jacket Ritchie R12 R22 R502 Refrigerant Gauges
$24.95
Liebert DELUXE SYSTEM 3 10 TON UPFLOW HVAC
$10500.00
Bell & Gossett: Expansion Tank- 15 Gallon, New- PSI 375
$250.00
BARBER COLMAN EA71 INDUSTRIAL ACTUATOR, NEW
$59.99
Teledyne Laars Natural Gas Hot Water Boiler Mod. PW0600
$1400.00
NEW UEI DM397 True RMS Digital Multimeter / HVAC 1000v
$199.99
TIF 8800 Combustible Gas Detector
$50.00
LAU Blower Assembly 20" Wheel Belt Drive Double Inlet
$349.99
Evcon Packaged Unit Air Conditioner 4-Ton
$800.00
Climatrol Under Duct Power Humidifier
$0.99
WIKA #4343417, 2 1/2" VAC /PRESSURE GAUGE, 30" - 60 PSI
$2.99
15' Copper Tube 6 Lot 1/4" Thick (6.24mm) 5 lbs Weight
$17.55
YELLOW JACKET SUPEREVAC 6CFM ( BRAND NEW NEVER USED)
$150.00
DIGITAL SENSOR Antunes Adjustable Inputs PN 8563120030
$25.99
BELIMO DAMPER ACTUATOR AF-24 MFT US 133 in-lbs
$34.00
NEW COPPER P-TRAP 1 1/8" Refrigeration
$19.98
NEW HVAC PARTS! Johnson Controls P70AB-2C Control
$19.99
HONEYWELL R7847 C 1005 FLAME AMPLIFIER ,USED IN BOX
$20.00
(2029-12) Condenser Core, new
$34.95
3 phase electric heater
$150.00
ROBERTSHAW 7000MVRLC 7000 MVRLC GAS VALVE, NEW!
$34.99
FANTECH FRD24-14 Inline Centrifugal Duct Fan NIB
$499.99
NEW COPPER FITTINGS 1 1/8"OD 90 ELBOW Refrigeration
$34.98
AMERON BONDSTRAND M74 FIBERGLASS PIPE SHAVER
$250.00
HONEYWELL S 7800 A 1001 KEYBOARD DISPLAY MODULE , USED
$28.00
Emerson Motor 5458 Brand New in Box
$29.99
AIR CONDITIONING GE BLOWER FAN MOTOR 1/3 HP HVAC
$27.00
BELIMO DAMPER ACTUATOR AF-24 MFT US 133 in-lbs
$34.00
Luxaire 4 Ton Outdoor Air conditioner. HASE-T048SA
$695.00
Honeywell Smart Gas Valve SV9501M2056 NEW
$52.00
DAYTON 3C428 Blower 20" Wheel Belt Drive Double Inlet
$449.99
Vacuum Pump Robinair 15600 6 CFM 2 stages
$179.99