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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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TECUMSEH 1HP COMPRESSOR (R-134a) ~ MED. TEMP!
$89.99
CPS 6 CFM 1/2 HP Single Stage Vacuum Pump A/C Tool AC
$185.99
Parker Bi-Directional Heat Pump Dryer/Filters R410A NEW
$12.49
roof curb big new adaptable air products comercial
$99.00
NEW 30 LBS R-22 REFRIGERANT SEALED
$162.50
ROBINAIR GAUGES HI AND LOW SIDES MANIFOLD AND HOSES
$30.00
Triangle Fans Contractors Fan 1/4 HP 115 Volt 24 Inch
$49.99
FlowPro Industrial Pedestal Fan 30in 8500 CFM 1/4 NR
$74.99
TACO ZONE VALVE 3/4" SWEAT 571-2 LOT OF 12 NIB 1/2PRICE
$399.99
Greenheck Industrial Vent Damper
$9.99
ALCO THERMO EXPANSION VALVE (R-12) HF 1/2 FC - NIB!
$79.99
FUJI ELECTRIC RING BLOWER VFC504A-7W
$299.00
Open Cylinder Refrigerant R-22 R22 HVAC Refrigeration
$49.00
EXHAUST FAN Industrial - Belt Driven - 42" - 115V
$629.00
Greenheck Industrial Vent Damper
$9.99
PARAGON 8015-3 D-FROST-O-MATIC TIMER MOTOR SPDT 240V
$49.99
NEW SPIRAX/SARCO FLOAT STEAM TRAP 75psi 1/2"NPT(F)
$29.99
RefrigerationTemp. Control 1609-101
$19.99
TEMPERATURE INDICATOR TPM-110
$25.00
COILFLO NALCO HVAC COIL CLEAN EQUIPMENT Pressure Washer
$199.00
REMS 571790 1-1/2” Pressing Tongs
$49.99
2-Stage Rotary Deep Vacuum Pump 29.92"Hg 1/4HP AC/HVAC
$119.95
EVAPORATOR PRESSURE REGULATING VALVE 1/2"
$31.99
Halogen Refrigerant Freon Leak Detector AC/HVAC/R Tool
$69.95
REMS 571775 3/4” Pressing Tongs
$39.99
GENERAL ELECTRIC GE 1/30HP 1550RPM SHADED POLE MOTOR
$19.99
Halogen Refrigerant Leak Detector HVAC/R Tool New Model
$99.00
Echelon Ilon100 E3, Lonworks Internet server
$102.50
NEW TEMP-TRAX NETWORK TEMPERATURE MONITOR W/50' PROBE
$49.99
Echelon PCC-10 TP/FT-10 LONWORKS® PCMCIA Card
$96.11
19 Book CD * HVAC Air Conditioning | HEATING Manuals CD
$0.99
New Beckett Igniter 51824U, Ignitor Transformer
$13.28
Honeywell RP920A1033 Receiver Pneumatic Controller
$19.99
2 TON UNCASED EVAPORATOR COIL (CAC/BDB) ~ NEW IN BOX!
$149.99
ALCO Refrigerant Dryer Shell-Reduced
$39.95
CPS LEAK-SEAKER SENSOR REFRIGERANTS DETECTOR
$39.95
GENERAL ELECTRIC GE 1/10HP 1600RPM 3 SPEED PSC MOTOR
$19.99
8 HEATING VENTILATION AIR HVAC TRAINING COURSES CD -NEW
$7.99
RIELLO OIL BURNER PUMP PRESSURE AND VACUUM GAUGE SET
$26.00
R-410A REFRIGERANT - 25 LB
$100.00
REMS 571780 1” Pressing Tongs
$39.99
1/20 HP UNIT HEATER MOTOR
$10.00
Neutronics Deluxe Refrigerant Identifier
$177.50
TIF 9025 ELECTRONIC REFRIGERANT CHARGING HVAC SCALE
$9.99
HONEYWELL AT140A 1042 TRANSFORMER HVAC 24 vac 120/240v
$0.99
CONDENSATE DRAIN PAN 115V
$10.99
UVC ultraviolet light UV LAMP Air Cleaner 36watt
$99.00
square diffuser 24 inch with 6 inch connector free s&h
$29.00
HEAD PRESSURE FAN CYCLING ( P70AA-118C )
$47.99
2 Diversitech Motor Run Capacitor 440V 50/60Hz 45150H
$2.99
HONEYWELL POWERPILE COMBINATION GAS CONTROL/225,000 BTU
$99.99
Echelon DIO-10 LONWORKS® Digital I/O Modules Lot of 8
$122.50
WHOLE HOUSE FAN - ATTIC FAN - 30" - Direct Drive
$421.00
REMS 571785 1-1/4” Pressing Tongs
$39.99
TIF 9010A Slimline Electronic Scale
$75.00
Taylor Pocket Sling Psychrometer #1330*UNUSED IN BOX*
$20.53
Warner Trane electromechanical actuator
$25.00
Uniweld Hvac Refrigerant Manifold Gauges NR New
$62.50
Greenheck Industrial Vent Damper
$9.99
Suncourt Inductor In-Line Duct 8" Fan P/N DB208, NEW NR
$19.06
TRADELINE HONEYWELL MODUTROL MOTOR M845A1027 120/240V
$19.99
REMS 571795 2” Pressing Tongs
$59.99
REFRIGERANT RECOVERY UNIT ~ R12, R22, R500, R502!
$399.99
Carrier 10 Ton Package Unit AC/ Heat w/ recirc. fan@@ f
$3000.00
DAYTON ~ 4Z577A ~ A/C Refrigeration Vacuum Pump FLORIDA
$99.99
3 Factory New - Aviation Snips HVAC Tools L-R-Straight
$31.00
LOT 5 RECIVER
$26.51
Emerson 3755 Motor 1/6 hp RPM - 1650/2 SPD 208-230V NEW
$7.99
7 NIB Honeywell XL10 Hydronic controllers W7762B1027
$0.10
EFFIKAL 7" GAS DAMPER SYSTEM MODEL RVG7 FURNACE HVAC
$4.99
LOT OF 5 HVAC TOOLS WISS MALCO SNIPS SEAMER CRIMPER +++
$20.50
AJAX BOILER 350K BTU NATURAL GAS USED NR (LOT#5)
$481.89
NEW 5238 BTU Air Conditioner Compressor
$6.95
Parker Filter Dryer Cores
$35.99
THREE ROLLS ~ VIRGINIA FOAM INSULATION TAPE
$28.00
PARAGON 8015-0 D-FROST-O-MATIC TIMER MOTOR SPDT 120V
$21.50
IS LKD100 Combustible Gas Methane Leak Detector
$15.99
WASTE OIL BURNER SINGLE PIECE ELECTRODE
$19.95
HVAC Air Conditioning * Heating Ventilation 19 books CD
$0.89
veris pressure
$3.24
REMS 571770 1/2” Pressing Tongs
$39.99
~Broan NuTone 690 Bathroom Fan Upgrade Kit~NIB~
$14.99
RANCO OUTDOOR THERMOSTAT FOR HEAT PUMP FURNACE
$5.00
In-Take "Jen Fan Company" Commercial Fan
$250.00
Air Activated Actvator HVAC (Christmas/float displays?)
$40.00
Lot of Cutting and Swaging Tools
$0.99
Air Brush/Flush Tool Kit Canister Hose Gun Assembly AC
$49.95
Various Refrigeraton/HVAC Parts, New!!
$0.99
Lux Pro PSP600 Single Stage Programmable Thermostat
$14.99
8 ROLLS SILVER / FOIL HVAC TAPE - peel and stick
$17.99
ASCO 3-Way Valve P/N 8320G182, 120 vac, 1/4 NPT, NC, 0-
$14.99
4 NIB Honeywell XL10 VAV controllers W7751D2008
$0.30
Delavan 30609 -28 Waste Oil Burner Nozzle LOT OF 3
$26.00
Honeywell TP970A2145 Pneumatic Thermostat
$14.99
New Pacific Electronic HVAC Condensate Pump Assembly
$9.99
SOLENOID VALVE 3/8" ODF SOLDER
$13.99
GE 5SME39SL0253 OR LENOX PN # 39L2701 BLOWER MOTOR
$150.00
WASTE OIL BURNER SINGLE PIECE ELECTRODE
$24.95
LG PTAC Wireless Touch Sc Thermostat Kit PYRCUCC0A NIB
$190.00
Carrier 3 Ton Package Unit AC/ Heat w/ recirc. fan@@ f
$1600.00