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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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Industrial Pedestal Fan 30" 8500 CFM 1/4 HP NEW
$144.99
R134A Brass Manifold Gauge Set
$9.99
2472 CFM portable 12" Utility blower ventilator dryer
$129.99
Honeywell Modutrol IV Motor M4185B1017 120-240V 50/60Hz
$14.99
FASCO 70023499 WOOD COAL CORN STOVE BLOWER 115V 3000RPM
$19.99
ARMSTRONG 800 INVERTED BUCKET STEAM TRAP 3/4" 20PSI NEW
$19.99
SNAP ON Pressure Cooling System Leak Tester SVTS262A
$9.99
TRANE TRR0616 TRANSFORMER FOR XV1500 SYSTEMS
$5.00
8 HEATING VENTILATION AIR CON HVAC TRAINING COURSES CD
$7.99
1872 CFM portable 10" Utility blower ventilator dryer
$99.99
Halogen Refrigerant Freon Leak Detector Air Pump HVAC/R
$9.95
Ritchie Yellow Jacket Test & Charging Manifold NR!!!
$10.51
Lot 21 HVAC Service Repair Training Manuals Robertshaw
$9.99
Thermo Anemometer Vane Wind Speed Air Flow Meter NEW !!
$99.95
Carrier Edge Thermostat TP-PRH New
$10.99
SPORLAN CATCH-ALL C-032-F FILTER-DRIER 1/4" FEMALE -NOS
$4.99
*** Marley M601W Line Voltage Thermostat M601 NEW ***
$9.99
HVAC LEAK DETECTOR 12 LED UV BLACK LIGHT + 3 FREE GIFTS
$9.00
AC FREON LEAK DETECTOR HVAC ELECTRONIC WITH CASE NICE
$9.99
Washdown Corrosion-Resistant Unit Heater
$150.00
Variable Speed Zebra Motor Tester Meter HVAC
$20.50
A. O. Smith 1/6 hp central air condenser fan motor mint
$49.95
New Honeywell Tradeline V8043 F 1036 Boiler Zone Valve
$54.00
VINTAGE HONEYWELL T87F 2873 HEATING COOLING THERMOSTAT
$9.99
Sporlan XSB Solenoid Valve - 24v
$30.00
1 NEW 2 PC. RAIN SUIT SIZE LARGE NEW IN ORIGINAL PKG.
$5.99
Robertshaw 9420 Digital Thermostat Honeywell NIB NEW
$9.99
WHITE-RODGERS MULTIFUNCTION 36E36 304 GAS VALVE UNIVERS
$24.99
CARRIER A/C FC4DNF036 AIR CONDITIONER AIR HANDLER
$99.95
R-12 sercon refrigerant-4 cans+ oil
$20.50
* Dayton 140 CFM Shaded Pole Blower 4C442 / 8C242 NEW *
$49.99
Hermetoc analyzer Refrigeration HVAC tester Annie A-12
$15.50
Alco Refrigeration Ball Valve ABV-21 2 5/8" ODF NIB
$15.00
ROBINAIR 15600 Vacuum Pump ~ COOL TECH 6 cfm A/C Pump
$199.00
Mannix Thermo-Anemometer CFM Master DCFM8901
$23.50
AIR VACUUM PUMP R134A & R12 A/C WORK CENTRAL PNEUMATIC
$15.99
Robertshaw 9710 Digital Programmable Thermostat NIB NEW
$9.99
UNITED BRASS WORKS MODEL 850 1/2" STEAM TRAP 125psi NEW
$19.99
Fasco115v Blower Microwave Wood Furnace Wood Burner
$15.50
Honeywell V4055E1016 ON-OFF actuator with Proof of Clos
$99.99
POWERS Electric/Pneumatic Air Valve EP 2651002 NEW
$9.99
1-3/4" Heavy Duty Strap 100Y Roll HVAC CARGO FREIGHT
$6.99
CEN-TECH Electronic Halogen Leak Detector
$4.99
Reliable Controls Mach Zone controller NIB!!!
$109.99
EXHAUST FAN Commercial - Direct Drive - 20" - 1/4 Hp
$363.00
Wholesale Lot 3 Robertshaw Invensys Actuators NEW NIB
$4.99
5 PACKS 36 INCH CABLE TIES NEW!!
$15.50
Ranco Commercial Temperature Control ETC-112000 NEW
$33.00
AdobeAir MasterCool 14" Evaporative Cooling Fan # MMB14
$415.00
MCDONNELL & MILLER VALVE & STRAINER SA51-101-102
$9.99
PLENTY UNIVERSAL BIMETALLIC STEAM TRAP TS250 250psi NEW
$19.99
2 PIPE EXPANDERS SET 1-1/2 TO 2-1/2 & 2-1/8 TO 3-1/2
$19.99
CRAFTSMAN 46342 Cooling System PRESSURE TESTER DLX Kit
$9.99
REMS 571795 2” Pressing Tongs
$59.99
REMS 571790 1-1/2” Pressing Tongs
$49.99
Large 2 oz Compressor Oil/Dye Screw-in Injector AC/HVAC
$57.75
REMS 571775 3/4” Pressing Tongs
$39.99
Refrigerant Leak Det. Sensor Inficon DTek TekMate Comp
$0.99
THERMAFLO REFRIGERANT a/c RECOVERY SYSTEM POWERMAX $0
$100.00
PUREGUARD2 R134a REFRIGERANT IDENTIFIER J 41810 IN BOX
$9.99
Paragon 8145-00 Refrigeration Defrost HVAC Control NIB
$21.59
3- 4 OUNCE ZOOM SPOUT OILERS NEW NEVER OPENED!!
$0.99
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe
$2.95
fasco bath fan motors new 2
$15.00
Goodman Gas Furnace, 4.0 Ton, 70K BTU, 80% GMH80704BNA
$539.00
Bacharach Leakator 10 Combustible Gas Detector NR!
$39.99
New CEM GD-3300 Combustible Gas Leak Detector
$85.99
Dual Gauge Manifold 5ft High Pressure Hose HVAC R134+Rx
$3.25
LeakCheck Refrigerant Halogen Leak Detector HVAC CFC
$39.99
Fan Control Center
$20.00
RANCO ADAPTABLE TEMP CONTROL
$10.00
SD90 Vaccuum pump with extras
$300.00
Inficon Refrigerant Freon Electronic Leak Detector HVAC
$8.50
Ranco Commercial Temperature Control ETC-211000 NEW
$33.00
Copeland Scroll Compressor ZP51KE-TFD-830 13 SEER 5 Ton
$259.99
TRENT ELECTRIC HEATING APPLIANCE PLUG HEATER FFHP-6043
$599.00
REMS 571770 1/2” Pressing Tongs
$39.99
YELLOW JACKET GAS PRESSURE TEST KIT
$9.99
Robertshaw 900-108 Gas Pressure Test Kit NIB
$9.99
NICE TRANE 40HP HERMETIC COMPRESSOR CRHF400B6B0P0R1F2B0
$1899.00
Honeywell TP970A2145 Pneumatic Thermostat
$17.99
TRANE EMI FILTER BOARD FOR XV1500 SYSTEMS
$25.00
Case of 12 Filtration Group HVAC Air Filter
$34.95
NEW ROBERTSHAW GRAYSON NAT. GAS VALVE B12826-00
$0.99
SNAP ON ELECTRONIC FREON LEAK DETECTOR REFRIGRNT ACT730
$0.99
Motor, 1/2HP, 2-Speed, 480V, 3-Phase
$25.00
Honeywell Q3450C2043 Burner Pilot.
$9.00
Halogen Refrigerant Freon Leak Detector AC/HVAC US Made
$19.00
Watts Series 800M4QT Anti-Siphon Pressure Vacuum Breake
$29.99
MS-NAE5511 Metasys Johnson Controls
$3900.00
REMS 571780 1” Pressing Tongs
$39.99
Irwin MAgnetic Nut Drivers Philips bits 2000 QTY HAVC
$650.00
Alco Refrigeration Ball Valve ABV-25 3 1/8" ODF NIB
$18.00
3 NEW Vol-Test™ Pocket Tester Voltage Tester 61-050
$6.99
REMS 571785 1-1/4” Pressing Tongs
$39.99
1/4X5/16" Adapter Connector Coupler Ball Valve Set HVAC
$39.95
Air Brush/Flush Tool Kit Canister Hose Gun Assembly AC
$49.95
WHOLE HOUSE ATTIC FAN - ATTIC FAN - 24" - Direct Drive
$391.00