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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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NIB 8 INCH FANTECH FX8XL 521 CFM INLINE FAN W/CORD

$200.00
QTY5 Ashcroft 0-4000 kPa 250 psi Gauge Supply Manifold

$24.99
Parker Solenoid Valve ORS81E13 1-5/8” ODF X 1-1/4”

$1.99
Trane 5 Ton Straight Cool 10 Seer Condenser

$600.00
7/8 Henry Refrigerant Ball Valve 905307

$10.50
Robinair 10237A A/C refrigeration hose adapter kit

$16.49
NIB 6 INCH FANTECH FX6XL 392 CFM INLINE FAN W/CORD

$170.00
JOHNSON CONTROLS HVAC CONTROL UNIT G66AG-1

$18.95
YORK 4 TON PURON AFFINITY SERIES HEAT PUMP UNIT

$4200.00
NEW R22 FREON SEALED CAN VIRGIN REFRIGERANT

$147.50
Danfoss Defrost Module DF 164-1

$9.99
Parker Solenoid Valve RB3ME4 ½” ODF X ¼”

$1.99
SINGLE STAGE VACUUM PUMP 13.5 CFM - NEW

$375.00
HONEYWELL L8124A TRIPLE AQUASTAT RELAY

$100.00
Wall Air Conditioner, Cool Heat, 14,000/13,600

$399.00
r-22 refrigerant hvac air conditioning 30lb full sealed

$113.61
HVAC Chiller

$50000.00
{LOT of 2} Janitrol Heater/AC Units Model#: UH-089-E1

$199.00
Copeland Refrigeration Condensing Unit #M2FH0033IAA-140

$150.00
30Amp 24v Contactor CHEAPEST PRICE!! $4.50

$4.50
NEW FIELDPIECE DUAL TEMPERATURE HEAD K-TYPE ATH4

$41.99
Armstrong Steam Humidifier Model 1200 Orifice size 7/32

$299.99
Sporlan Suct Line Filter Dr 1 1/8" Compact C149STTHH

$10.50
New - 2 STAGE VACUUM PUMP 8.5 CFM

$225.00
JOHNSON CONTROLS HVAC CONTROL UNIT G779LHA-1

$16.95
VAV Controller AP-VMA1420-0

$100.00
SINGLE STAGE VACUUM PUMP 13.5 CFM - NEW

$375.00
LC 250 Ladder Crane HVAC Tools Contractor Hoist moving

$280.00
Air Brush/Flush Tool Kit Canister Hose Gun Assembly AC

$49.95
2-5/8 Henry Ball Valve 900721B

$22.50
Asco RedHat Solenoid Valve 8210G14

$249.99
ASCO 2 Way Pilot Solenoid Valve Model 8210D4

$249.99
TEMPRITE REFRIGERATION OIL SEPERATOR # 604 12,22 & 502

$19.99
New - SINGLE STAGE VACUUM PUMP 6.6 CFM

$169.00
ASCO Red Hat II Coil MP-C-80 238210-032D 120 VAC

$99.99
1-1/8 Henry Glove Check Valve 205-1-1/8

$8.50
1-1/8 Henry Refrigerant Ball Valve 905409

$10.50
HVAC INSULATED AND NON-INSULATED DUCTS

$250.00
ITT Reznor Nat. gas heater 95900 btu.

$300.00
Parker Solenoid Valve RB3E3 3/8" ODF

$1.99
3 roof top exhaust fan housings

$9.99
1/4X5/16" Adapter Connector Coupler Ball Valve Set HVAC

$39.95
1-1/8 Henry Refrigerant Ball Valve 935409

$10.50
NIB 6 inch 309 cfm ELICENT INLINE FAN W/POWER CORD.

$160.00
CYRUS SHANK 75PSI 1/2"X3/4" LIQUID RELIEF VALVE

$24.99
NIB 4 inch 152 cfm ELICENT INLINE FAN W/POWER CORD!

$135.00
Midwest FCT-M-P1 Double Cut Pipe & Duct Cutter

$9.99
2-5/8 Henry Refrigerant Ball Valve 905721

$22.50
NIB CARBON FILTER 375 CFM HYDROPONICS

$125.00
2-5/8 Henry Refrigerant Ball Valve 904721

$10.50
r-22 refrigerant hvac air conditioning 30lb full sealed

$113.61
1-5/8 Henry Refrigerant Ball Valve 935613

$22.50
NIB 8 inch 635 cfm ELICENT INLINE FAN w/POWER CORD

$200.00
Refrigeration & Air Conditioning 4 Part Course 488 pgs

$7.99
NASHUA High Temperature Duct Tape - Full Case 24 rolls

$100.00
NEW RITCHIE YELLOW JACKET PRESSURE TEST KIT 78060

$39.99
Asco Red-Hat II Valve 8320G172

$49.99
Dayton Auto Gas Pilot Relighter System 24/120 vac

$4.99
ASCO 8215G95Q 1"NPT N/C Valve

$499.99
Robinair Smart Cart A/C Charging Station R-12 R-22 MORE

$79.00
Robinair Recovery Machine R12 R134A R22 R500 R502 Unit

$204.01
NEW YELLOW JACKET 2-VALVE 2 1/2" BRASS MANIFOLD 41212

$44.99
Asco Red-Hat II Valve 8211D1

$49.99
HORIZ. SUCTION ACCUM. REFR RESEARCH 3831 1-1/8 CONN

$9.99
Honeywell Tradeline Q5001D Valve bkt linkage Modutrol

$9.00
New Bottle Refrigerant R-404a HVAC Refrigeration 404A

$126.49
Portable Air Conditioner Spot Cooler Koldwave Airmaster

$4000.00
Fasco Inducer Motor D1182 1/16 HP 208/230 0.6 AMPS NIB

$12.00
New A.O. Smith Shaded Pole Blower 140 CFM 115V

$29.99
SSAC SOLID STATE TIMER 30 SEC / 1 SEC

$9.95
Carrier Heat Pump Air Conditioner Model 38AQ-12---520

$3000.00
Kewaunee Blower unit Model 2C3303 208-230 460 3PH

$50.00
Imperial 422C R410A R22 Manifold w/Hoses & Ball Valves

$143.95
New 4" Inch Inline Exhaust Cooling Duct Fan Vent Blower

$74.95
HONEYWELL ACTIONATOR VALVE ACTUATOR M640A-1204 *NEW*

$179.00
TRANE ROOFTOP HEATING AND AIR CONDITIONING UNIT

$3000.00
White-Rodgers 50T35-730 Furnace Control Circuit Board

$49.00
ODORSOK 450 CFM Carbon Filter. Light and easy to use.

$90.00
New Tjernlund BR-2 Head Fan

$9.99
Window Air Conditioner, BtuH 15100, Voltage Rating 115

$399.00
Malco HC2 adj hole cutter 2-20 inches sheet metal

$22.50
New - SINGLE STAGE VACUUM PUMP 3 CFM

$159.00
ROBERTSHAW MOTORIZED DAMPER STATIC PRESSURE CONTROL

$39.00
A.O Smith 3/4 hp Belt Drive Motor mod#C426V1

$28.50
1-5/8 Henry Refrigerant Ball Valve 935613

$22.50
Asco Red-Hat II Valve 8320G172

$49.99
NIB CARBON FILTER 275 CFM HYDROPONICS

$100.00
ITE 5750A Halogen Leak Detector ITE-5750A

$10.99
BECKETT A, AF, AFG, INGNITION TRANSFORMER

$24.99
FAN ASSEMBLY - HEATCRAFT 90 CFM 115V

$15.00
NEW R22 FREON SEALED CAN VIRGIN REFRIGERANT

$147.50
Asco Red-Hat II Valve 8211D1

$49.99
Air conditioner service 11 different service adapters

$40.99
Yellow Jacket Ritchie Gas Pressure Test Kit 78060 HVAC

$10.02
Full case NASHUA 558CA Aluminum Duct Tape 48mm x 50yds

$72.00
Car AC Quick Adapter Connector Coupler Set w/Valve HVAC

$37.95
1-3/8 Henry Glove Check Valve 205-1-3/8

$12.50
General GP8H Blower With Gas Engine

$299.00