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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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Weiss DVU35 Solar Vari Angle Digital Thermometer NIB

$9.99
Asco General Purpose Valve 8030B43E 3/4 208V/60Hz

$25.00
Halogen Gas Refrigerant CFC HFC Leak Detector V2T

$36.99
Recovery Cylinder

$65.00
Blower DAYTON

$699.95
Robinson-Halpern-D/P Xmitter- 0-5" H2O, 4-20ma Out

$9.99
Imperial 421C Deluxe R410A R22 Manifold Gauges w/Hoses

$79.95
Halogen Refrigerant Leak Detector Air Pump AC/HVAC Tool

$9.95
New Halogen Refrigerant Freon Leak Detector HVAC/R Tool

$69.95
Johnson Controls NCM NU-NCM350-1 Controller

$300.00
SPORLAN SA-175S LIQUID INDICATOR , NEW

$15.00
Commercial Exhaust Fan With Cold Air Return

$399.00
New Premier One 470140 Hepa Filter W/ 3 Carbon Filters

$19.99
Dayton Soplador blower NIB 4C591B Direct Drive 10 5/8in

$50.00
"FREON" R22 Refrigerant

$102.50
CADILLAC HP33P HEAVY DUTY BLOWER 115V/98 AMPS/25-60HZ

$99.95
Sporlan Catch All Filter Drier Dryer C-052-S

$4.99
PYRONICS REGULATOR VALVE # 81Q-BRZ NEW HAS SCRATCHES

$20.00
GreenHeck Exhaust Fan comercial

$650.00
SHEET METAL, DUCT, DUCTBOARD TOOLS 2 SHEET METAL BRAKES

$510.00
Andover Controls - Infinity TCX 870 Controller - QTY 10

$100.00
JOHNSON CONTROLS RLD-H10G Leak Detector HVAC

$195.50
DRAVO HASTINGS DIRECT FIRED AIR MAKE UP UNIT NAT. GAS

$750.00
GreenHeck Exhaust Fan comercial

$850.00
VACROMETER VACUUM GAUGE HVAC TOOL C.P.S. VG 100A

$50.00
40hp/10hp 2 Speed Cooling Tower Electric Motor NEW

$799.00
PREMIUM GRADE BLACK DUCT TAPE 3" X 60YD 2 ROLLS HVAC

$9.99
Dayton fan motor 3m568d BRAND NEW IN BOX NO RESERVE.

$9.99
Carrier Weather Master 8 1/2 Ton Package Unit Air Only

$2400.00
KMC CSP-5002 ELECTRIC ANOLOG CONTROLLER ACTUATOR NEW!

$9.99
Supco LIT11TC NR!!!!

$50.00
Air Conditioning Squirrel Cage Fan Puller

$27.00
Kickstart KS1 Hard Start High Torque 3.5 - 5 ton HVAC R

$46.95
HVAC Recovery Unit

$75.00
HVAC Tool, Superheat/Subcooling Calculator, PDA, NR!!

$70.90
Sporlan Valve Co. Thermostatic Espansion Valve Kit

$60.00
2 - Ritchie Yellow Jacket Air Conditioning Gauges

$49.99
NEW IN BOX FREON R22

$121.01
Honeywell RA117A 1047 Protectorelay oil burner

$29.99
Barber Colman Electronic Bulb Thermostat Model #TC-4111

$27.99
ROTOBRUSH

$4000.00
Premier One MUV 403H-16/5 UV Air Purifier With Ozone

$99.00
Brand new Gordon Piatt Burner R6.3-G-05 808MBH Max

$500.00
Functional Devices RIB2401B 20 Amp Relay in a Box, NiB

$9.95
New 10" Round Krueger Steel Perforated Diffuser 6500

$43.66
NEW HVAC CPS VACROMETER VACUUM GAUGE VG200 GAS METER

$27.00
HONEYWELL L8124A TRIPLE AQUASTAT RELAY

$110.00
REZNOR UDAP 200K LOW PROFILE UNIT HEATER

$1095.00
Ritchie Yellow Jacket 60613 epansion valve wrench

$4.99
Freeze-12 Refrigerant R12 AC Replacmt 12oz Can Freeze12

$24.95
DIALOGIC VOICE CONTROL SYSTEM VR/160

$9.99
FJC R134a Vacuum Pump and Manifold Gauge Set FJCKIT6

$157.95
R410A Manifold Gauge Set w/5ft High Pressure Hoses HVAC

$79.95
Commercial Horiz LENNOX Air Conditioner A/C 7.5 TON

$375.00
INDUSTRIAL FLOOR BLOWER (FAN)

$20.00
Centrifugal Blower Model CPS - 5 HP #j3

$250.00
R410A Manifold Gauge Set w/5ft High Pressure Hoses HVAC

$79.95
Maxess 24" Industrial Air Circulator Fan & Bracket New

$99.95
General filter Model 2A-700A 10 GPH NEW

$15.99
GreenHeck Exhaust Fan comercial

$650.00
2-Stage Rotary Deep Vacuum Pump 29.92"Hg 1/4HP AC/HVAC

$119.95
New 6" Round Krueger Steel Louvered Diffuser Model 1400

$44.66
Weiss thermometer w/ 10 ft. wired screw in probe

$6.49
Electric Heat Kit 5KW 230/208-60-1 for Bard SH-WA-WH

$15.00
Programmable Thermostat 1F97-1271 90 White Rodgers

$110.00
Alfa Laval - AlfaNova 76 Stainless Steel Heat Exchanger

$450.00
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC

$165.95
VENTED ITT 25000 BTU UNIT HEATER N/R FOR GARAGE/SHOP

$45.00
5 Danfoss Shut-Off Valves (Threeway) 1/4" SAE

$9.99
Honeywell C645D1029 Air Pressure Switch **New** in Box

$9.99
ASCO 8262G208 1/4" VALVE ,NEW

$20.00
MULTIVAC 884870 21HT4KOY160 VALVE , NEW

$15.00
Hastings Micron Vacuum Gauge

$68.89
GENERAL 147 FRACTION+ Digital Fractional Caliper

$32.99
NEW TELEMECANIQUE CONTACTOR LA1 DN 22 120V 60HZ

$14.99
recovery tank 25.5lb

$46.00
Maxess 24" Industrial Air Circulator Fan & Bracket New

$99.95
WATTS 335 HOT WATER BOILER RELIEF VALVE

$10.00
Furnace Ventor Motor Assembly Fasco

$19.99
York Heat strip/exchanger 2NH04501525 relay/fuse block

$25.00
Honeywell RA116 A1055 Protectorelay oil burner

$29.99
Lot Premier One HEPA 500 Annual Filters Carbon and Pre

$19.99
Inficon D-TEK Select Refridgerant Leak Detector NIB NR!

$215.00
New 8" Round Krueger Steel Louvered Diffuser Model 1400

$44.66
New A.O. Smith Shaded Pole Blower 140 CFM 115V

$29.99
Model 450 Carbon HEPA Pre Filter Blanket W4-0855 Sealed

$4.99
New 12" Round Krueger Steel Perforated Diffuser 6500

$43.66
TESTO 523 AC Refrigeration Analyzer In Case

$202.50
New LENOX LX800B Air Acetylene Torch Kit

$99.99
EDWARDS E2M8 TWO STAGE ROTARY VANE HIGH VACUUM PUMP

$280.00
BIG Squirrel Cage Blower 220V 3PH

$24.95
6 HEATING VENTILATION AIR CON HVAC TRAINING COURSES CD

$7.99
JOHNSON CONTROL P70AA-11BE PRESSURE CONTROL ,NIB

$20.00
Dayton Soplador blower NIB 4C591B Direct Drive 10 5/8in

$50.00
8" Can Fan INLINE DUCT EXHAUST FAN BLOWER HYDROPONICS

$218.00
Water Chiller System - Advantage

$18500.00
Control Instuments monitor flammable gas vapor Analyzer

$999.99
Amcor Portable Air Conditioner ALTL-12000E

$350.00
Bacharach Stinger 2000 Reclaimer

$150.00