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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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REFRIGERATION, AC, AND COLD STORAGE CD (488 pgs)

$9.95
Rotron Regenerative Blower - model DR303M

$89.99
Seltec Automotive Air Condition Compressor 500630-9034

$99.00
Air Conditioning Compressor Electromagnetic Clutch TM15

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New KI&BNT HVAC Halogen Freon Refrigerant Leak Detector

$62.99
MDI Pinnacle 1000 A&B recover reclaim HVAC Gauges, Tank

$189.00
Fluke 116/322 HVAC Multimeter Combo Kit W/ Case

$152.50
Sporlan Catch All Filter Drier C-162-S 1/4” ODF Solder

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Sporlan Catch All Filter Drier C-082-S 1/4” ODF Solder

$9.99
Sporlan Catch All Filter Drier C-052-S 1/4” ODF Solder

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REZNOR VR 125,000 BTU GAS TUBULAR INFARED HEATER NEW !!

$199.99
Danfoss Coil For Solenoid Valve 018Z6856 12v BG012D

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YELLOW JACKET 68802 DIGITAL ELECTRONIC CHARGING SCALE

$127.50
Sporlan Thermostat Expansion Valve KT-43-RC 180301 R502

$9.99
Extension Universal Joint Boiler TUBE EXPANDER TOOL

$45.00
Danfoss Themostatic Expansion Valve R502 068Z3282 TY 2

$9.99
Strain-o-kap Capillary Tube Strainer Combination S-11

$9.99
SANYO MAIN CIRCUIT BOARD HVAC

$49.99
Boiler Furnace Heat Oil Gas Coal HVAC 19book CD Library

$0.01
Sporlan Thermostatic Expansion Valve QC-0 Red 168070

$4.99
DRI-STEEM STS-25S COMMERCIAL HUMIDIFIER

$9.99
Lynn Combustion Analyzer in Case Complete Set

$9.99
HONEYWELL ECONOMIZER CONTROLLER

$19.99
Sporlan Evaporator Pressure Regulating Valve ORIT-6-0/5

$9.99
HVAC Parts Lot of 3

$0.99
Apollo Conbraco 1½" 2pc. Bronze Ball Valve {Lot of 3}

$34.99
Danfoss Themostatic Expansion Valve R12 068Z3204 TEF 2

$9.99
HVAC CD (5578 pgs, 55 reference manuals)

$9.95
Browning H 1 1/8 SS Split Taper Bushing

$4.99
Comair Rotron Major Fan 032920 JQ12B7X 12v

$9.99
Danfoss Themostatic Expansion Valve R22 068Z3209 TEX 2

$9.99
EG&G regenerative blower, cooler, vacuum pump New NR

$150.00
Mastercool HVAC DIGITAL MANIFOLD New for 08 MAS99772

$449.95
HVAC Books LOOK Brand New

$112.50
Sporlan Valve Less Coil S6S130 O/N 974567 330200

$9.99
DRAVO HASTINGS DIRECT FIRED AIR MAKE UP UNIT NAT. GAS

$750.00
Swep 85Hx16 Heat Exchanger

$49.99
alnor velometer jr type 8100

$22.99
HVAC CD (5578 pgs, 55 reference manuals)

$9.95
Marine A/C ,corrosion resistant 500 cfm blower 115v

$20.00
honeywell oil burner primary control R8184G new

$10.50
Electronic Halogen Refrigerant Leak Detector AC/HVAC/R

$49.75
Superior Refrigerant Diaphragm Packless Line Valve 891N

$9.99
INFICON D-TEK REFRIGERANT LEAK DETECTOR & Case NR

$62.00
ITT Grinnell 1¼" Dia-Flow Diaphragm Valves {Lot of 2}

$44.99
HVAC 2007 EPA/Freon Certification Manual w/ Tests

$2.00
Nice Duro Dyne Compact Pinspotter HVAC Duct Insulation

$305.00
White-Rodgers Pilot Relite Control

$15.00
EXHAUST FAN Industrial - Belt Driven - 42" - 115V

$629.00
CPS CC100 Compute-A-Charge Scale Refrigerant Scale

$59.00
TPI 720B Combustible Gas Leak Detector

$69.99
OmegaFlex Vibration Absorber OFVS0250 Stainless Steel

$9.99
NRP FF1 R12 R22 R502 R134A Refrigerant Recovery Unit

$195.00
Sporlan KT-43-FC Thermostatic Expansion Valve

$9.99
MALCO SL5 SNAP LOCK PUNCH

$12.99
Sporlan Thermostatic Expansion Valve QC-4 Pink 168078

$4.99
Barber Colman TK-6124 Pneumatic Thermostat Controller

$19.95
Sanden Air Condition Compressor Clutch 22236

$9.99
REFRIGERATION, AC, AND COLD STORAGE CD (488 pgs)

$9.95
Dayton Gas-Fired Commercial Infrared Heater New

$299.00
R134a Auto A/C SNAP-ON Couplers w/R12 Fittings & Caps

$25.95
HVAC Parts Lot of 3

$0.99
NIB Refrigerant Compressor A045 1/4 hp Part #G 150816

$49.99
3 New Lennox 48K98 Blower Control Circuit Boards NR !!

$24.95
NEW!! FlowPro Industrial Pedestal Fan-30"

$224.95
SPENCE1" E VALVE REPAIR KIT STEAM PRESSURE REGULATOR

$24.99
Belimo HVAC Damper Actuator Model No. AF 120 US

$9.99
MALCO TOOL LOT SNIPS DUCKBILLS HAMMER NUT SCREWDRIVERS

$102.50
Alco Controls ¼" Power Assembly Unit XB-1019HW1B *NEW*

$9.99
Sporlan Catch All Filter Drier C-303-S 3/8” ODF Solder

$9.99
Sporlan Solenoid Valve KS-B6/E6 381145

$9.99
SPENCE 1-1/2"EVALVE REPAIR KIT STEAM PRESSURE REGULATOR

$24.99
Inncom Digital Thermostat e4-5 System

$29.99
LeakCheck Refrigerant Halogen Leak Detector HVAC CFC

$39.99
Danfoss Themostatic Expansion Valve TUB R134a 068Z2559

$9.99
Sporlan Thermostat Expansion Valve KT-43-FC 180335 R12

$9.99
19 Book CD * HVAC Air Conditioning | HEATING Manuals CD

$0.99
TIF XP-1A Refrigerant Leak Detector

$79.99
R22 DuPont Freon Refrigerant 30lb. New R-22 Genetron

$141.99
EVAPORATIVE COOLER PUMP MASTERCOOL 120V 7500 CFI CP200

$8.00
Robinair 6 CFM 2 Stage Vacuum Pump 15600 A/C ROB15600

$254.95
Sporlan Thermostat Expansion Valve KT-43-VC 180319 R22

$9.99
SPENCE 3/4" E VALVE REPAIR KIT STEAM PRESSURE REGULATOR

$24.99
TWO TRANE TCONT800 TOUCH SCREEN PROGRAMABLE THERMOSTAT

$101.99
NIB Tecumseh Compressor Model AE1410A AE232AT-621

$49.99
Sporlan Thermostatic Expansion Valve QC-3 Blue 168076

$4.99
PTAC New 1 1/4 Ton W/ 5000 watt heat ptac unit

$20.51
~Broan NuTone 690 Bathroom Fan Upgrade Kit~

$19.99
Vacuum Pump/Recovery Tank ADAPTER 1/4FM x 1/4M x 1/2"

$8.95
Manifold Gauge Set 5' High Pressure R407 R134A R404 R22

$31.00
NEW APPION G5 TWIN REFRIGERANT RECOVERY UNIT

$540.00
PARKER PEDAL GUARD KIT M232003 NEW NIB FS SCHRADER

$54.99
Watsco Refrigerant High Pressure Control PS-HP350-250

$9.95
REFRIGERANT BLAK-RAY LONGWAVE ULTRAVIOLET LAMP B-100A

$82.50
Sporlan Crankcase Pressure Regulating Valve CRO-6-0/60

$21.50
HVAC (& REFRIGERATION) NEW ASS'T TOOLS & EQUIPMENT LOT

$127.50
Frick Seal Shaft Assy Kit 111V0016998

$9.99
Sanden Clutch Field Coil 25-8598 12V 132mm

$9.99
ASCO REDHAT solenoid valve 8215G030 120/50 110/50 NIB!!

$79.99
NEW BROAN MODEL #503 EXHAUST FAN

$29.99