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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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YORK 3.5 TON PURON AFFINITY SERIES GAS/ELECTRIC UNIT

$4130.00
YORK 3 TON PURON AFFINITY SERIES HEAT PUMP UNIT

$3775.00
Omron E5AK-AA2-500 Digital Controler

$19.95
Refco 466076 TELL-7 Cross Bow Type Tubing Bender

$132.00
Copeland JRC40050PAA High Temp HVAC Compressor 115V/R22

$79.99
NEW COPELAND M2FH-0017-SAA-106 REFRIGERATION CONDENSOR

$55.50
New DANFOSS Performer Scroll Refrigeration Compressor

$445.00
Copeland .JRN10025IAA 1/4 HP/R-12 Compressor High Temp

$69.99
YORK 3 TON HEAT PUMP PACKAGE UNIT/ FREE SHIPPING

$2830.00
Dayton motor and Fan

$10.00
NOVAR controls Temperature Probe # RTS-30712006000

$9.99
40hp/10hp 2 Speed Cooling Tower Electric Motor NEW

$799.00
SQUIRREL CAGE FAN & MOTOR 220V 50-60hz NEW 1/8 HP GE

$24.95
YORK 5 TON HEAT PUMP PACKAGE UNIT/FREE SHIPPING

$3350.00
Cyclothem STEAM BOILER ++ Expansion Tank & Inline Pumps

$499.00
YORK 3.5 TON HEAT PUMP PACKAGE UNIT /FREE SHIPPING

$3065.00
New DANFOSS Performer Scroll Refrigeration Compressor

$265.00
YORK 5TON GAS PKG UNIT 13 SEER FREE SHIPPING

$3229.00
Mountain 1.5 CFM A/C Vacuum Pump MTN 8403

$116.95
Sate-T-Switch SS1 Condensate Overflow Shut-Off Switch

$10.00
YORK 4 TON GAS PKG UNIT 90,000 btu/FREE SHIPPING

$3100.00
YORK 4 TON PURON AFFINITY SERIES GAS/ELECTRIC UNIT

$4300.00
YORK 5 TON PURON AFFINITY SERIES HEAT PUMP UNIT

$4550.00
REZNOR HEATING UNITS, LOT OF

$168.50
Johnson Controls D350 Temperature Display Module

$15.00
New Never Used Carrier 12Ton Omnizone Air Condiioner

$250.00
YORK 3.5 TON GAS PKG UNIT 90,000 btu /FREE SHIPPING

$3045.00
YELLOW JACKET ELECTRONIC CHARGING SCALE (68802)

$75.00
JOHNSON CONTROLS Y88FB TWINNING CONTROLS LOT OF 4 NIB

$56.00
Copper Fittings Plumbing Heating Air Conditioning HVAC

$6.95
A/C, REFRIGERATION MOTOR, 1 HP

$29.99
Commercial Air Conditioner Carrier Roof Top Unit (RTU)

$6250.00
12" Can Fan INLINE DUCT EXHAUST FAN BLOWER HYDROPONICS

$320.00
Totaline TotalVac Refrigerant Recovery Unit P706-001

$179.00
Wholesale Industrial Portable 3 Speed Fan Blower 300CFM

$49.95
ebm fans part #230-000032-001 new out of box lot of 11

$145.00
New DANFOSS Performer Scroll Refrigeration Compressor

$585.00
YORK 2.5 TON GAS PKG UNIT 56,000 btu/FREE SHIPPING

$2590.00
YORK 3 TON GAS PKG UNIT 72,000 btu /FREE SHIPPING

$2742.00
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe

$2.95
INDUSTRIAL RELAYS, CONTACTOR,THERMAL OVERLOAD NEW LOOK!

$10.00
YORK 2.5 TON HEAT PUMP PACKAGE UNIT/ FREE SHIPPING

$2625.00
New Lot Paxtox Valve OD X 4" Lg 2731612 NIB

$69.99
YORK 2 TON GAS PKG UNIT 36,000 btu/FREE SHIPPING

$2390.00
Imperial 600 Series 4-Valve Manifold + Hoses 651-C NEW

$95.00
Yellow Jacket Liquid-filled Gauges BRUTE Manifold

$113.52
Drain Pan Emergency Shut Off Switch 24v low voltage AC

$5.95
York 920 Ton Chiller "Excellent Condition"

$60000.00
2 Stage Rotary Vane Deep Vacuum Pump 29.92"Hg 2CFM HVAC

$119.95
New Halogen Refrigerant Freon Leak Detector HVAC/R Tool

$69.95
YORK 2 TON HEAT PUMP PACKAGE UNIT/ FREE SHIPPING

$2570.00
2 Stage Rotary Vane Deep Vacuum Pump 29.92"Hg 2CFM HVAC

$119.95
Honeywell Dual Gas Valve VR8204 A2001 VR8204A2001 NEW

$39.95
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC

$167.77
Halogen Refrigerant Freon Leak Detector AC/HVAC/R

$35.00
YORK 4 TON HEAT PUMP PACKAGE UNIT/FREE SHIPPING

$3145.00
New in crate! Indeeco heating unit

$125.00
Pressure Gauge, Terice

$4.50
1/3 HP BELT-DRIVE BLOWER MOTOR

$20.00
hangers

$10.00
Copeland HVAC 1HP/115V Compressor JRL40100PAA900

$99.99
8 x 14 ACTIVATED CARBON FILTER ODOR SCRUBBER 240 CFM

$149.95
D-Tek Select Refrigerant Leak Detector w/Case & Manual

$150.00
IG-LO HVAC Refrigerant Charging Manifold 12 22 502

$16.05
36" HVAC Refrigeration Refrigerant Charging Hoses

$18.95
HD Fan, Exterior Housing, Ground Mount, 4000 CFM

$350.00
10 X 24 ACTIVATED CARBON FILTER WITH 550 CFM FAN

$189.95
Dwyer digital manometer series 477-5-fm (No reserve)

$47.00
3 ton Roof Top AC Carrier Air Conditioner 230 3ph

$898.00
The OEM Rocket 7000 Wireless Fuel Level Monitor

$96.00
60" HVAC Refrigeration Charging Hoses Low Loss Set RYB

$32.95
Imperial HVAC 4-Valve Manifold R-22 # 423-CR & 425-CB

$41.00
NU-CALGON 4300-09 RX11 AC & REFRIGERATION SYSTEM FLUSH

$21.84
T-250 FRP Cooling Tower, 37.5 CTI/T, New, w/Warranty

$2554.00
In Line Fan, 18 Inch, Dayton,

$210.00
T-240 FRP Cooling Tower, 30 CTI/T, New, w/Warranty

$2285.00
T-28 FRP Cooling Tower, 6 CTI/T, New, w/Warranty

$761.00
TRANE 450 Industrial Water Cooled Chiller

$37000.00
Honeywell Fast response Temp. Controller

$15.00
Brush on Blu Refrigeration Leak Detector

$7.50
YORK 3.5 TON PURON AFFINITY SERIES HEAT PUMP UNIT

$4000.00
YORK 3 TON PURON AFFINITY SERIES GAS/ELECTRIC UNIT

$3800.00
Klenk DA71010 Dual Duct Board and Insulation Knife

$13.95
REFRIGERATION & AIR CONDITIONING TRAINING MANUAL

$4.99
HVAC 2008 EPA/Freon Certification Manual w/ Tests

$2.00
Brinmar Sound Blanket for AC Compressors SBUHD New

$49.90
Mastercool HVAC DIGITAL MANIFOLD New for 08 MAS99772

$459.95
HVAC-R Heating Air Conditioning Heat Pump 90+ switch

$5.95
Raitrol valve air-oil by North american mfg.co.

$0.99
BRASS Y-STRAINERS 1/2", LOT OF 3, NEW

$9.99
Malco N2 1" Hand Vee Notcher Sheet Metal Hand tool

$39.95
NIB DETROIT THERMOSTATIC SWITCH 222-10 NL-2222568

$99.95
YORK 5 TON PURON AFFINITY SERIES GAS/ELECTRIC UNIT

$4400.00
KA50-T GENTEC BRAZING SET

$170.00
PORT-A-COOL PAC2K363S 36" BLADE EVAPORATIVE COOLING FAN

$1800.00
T-2150 Cooling Tower, 112.5 CTI/T, New w/Warrany

$6252.00
TRANE Occupancy HVAC Thermostate

$0.99
HVAC Blower Motor DL1056

$50.00
GREENHECK CUBE 14-7G 3/4 HP ROOF UPBLAST EXHAUST FAN

$399.99