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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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TIF 5550A AUTOMATIC HALOGEN LEAK DETECTOR
$24.99
Loren Cook Wall Mounted Centrifugal Exhaust Fan PICK-UP
$250.00
Air Conditioning Tools A-C Manifold Gauge Set ROBINAIR
$39.95
Honeywell PressureTrol Controllers Model # L404F 1083
$0.99
NEW Refrigeration Air Conditioner Compressor 5238 BTU
$6.99
BOILER CONDESOR EXCHANGER TUBE ROLL FLARING EXPANDER
$9.95
134a Aluminum Gauge Set & 25 lbs of R-134A REFRIGERANT
$60.00
1- Source 1, HVAC Motor, 1/12 HP, 1050 RPM
$9.99
UV Lamp AC Duct. Light air cleaner ultraviolet uvc
$75.00
hvac leak sealer
$6.50
NEW in box Lot of 6 Assorted HVAC Tools
$39.00
New Term Lok Air Condition Compressor Repair Kit HVAC
$24.99
Honeywell E02104 Control PID with Relay Outputs NEW IB
$49.99
NEW HVAC Parts! Paragon 8145-20 Defrost Timer
$81.00
Two IS LKD100 Combustible Gas Methane Leak Detector
$19.99
Sil-Fos 5% Brazing rods 25 1lb tubes 1 case
$400.00
Air-Vac A/C Vacuum Pump Evacuation R-134A R22 R12 NEW
$24.99
GE Electric Motor 220/240V 1425RPM PH1 60HZ Cradle Base
$9.99
10 LOT 5mfd 370 Volt Motor Run Capacitor 5 mfd uf NEW
$21.95
Honeywell Q682A 1038 subbase for T8082A thermostat
$2.00
MASTERCOOL *NEW* Gauge Set w/Hoses "MADE IN THE USA"
$25.00
117/120vac 60hz 2 Speed Fan/Blower Motor
$4.99
FUEL OIL BURNER NOZZLE LINE HEATER
$14.99
UVC ultraviolet light DUAL UV LAMP Air Cleaner 72watt
$140.00
INFICON VORTEX RECOVERY UNIT 780-202-G1
$207.50
Halogen Gas CFC HFC Refrigerant Leak Detector Checker
$39.99
2HEAT,2COOL, heat pump PROGRAMMABLE THERMOSTAT
$50.00
Honeywell Natural Gas valve
$50.00
WATER HEATER FROM THE WOOD STOVE TO HEAT THE HOUSE
$9.99
ASCO 3 WAY/2 POSITION BRASS SOLENOID VALVE 8300D76F
$49.95
1 lot of electrical tools
$25.00
Lennox 38393 COMPRESSOR CONTACTORS P-8-7736, 3 pole 24V
$4.99
SUPER SEAL HVACR / BRAND NEW - VERY CHEAP
$29.98
Honeywell PressureTrol Model # L404F 1383
$0.99
Motor Run Capacitor 370 volt / 7.5 MFD
$2.00
2HEAT,2COOL, heat pump PROGRAMMABLE THERMOSTAT
$50.00
NEW HVAC Parts! Paragon 4004-71 Defrost Timer
$26.00
SEIMENS; GCA121.1U DAMPER/ACTUATOR;OPEN AIR, NEW IN BOX
$10.50
BOILER CONDENSOR TUBE COLLAPSING CHISELS WILSON TOOL
$9.95
Cross Bow Tube Bender Crossbow Type
$85.00
Hartzell Propeller and Fan Co. model 48-12-DBC
$5.00
Zone Valve
$15.50
BOILER CONDENSOR TUBE COLLAPSING CHISELS WILSON TOOL
$9.95
Cadet Com-Pak Plus In-Wall Panel Heater CC101TW
$135.00
Appion G5 Twin Refrigerant Recovery Machine
$224.50
Johnson Controls AS-UNT121-1 Unitary Controller
$100.00
Midwest Tie Wrapper, Hammer, Snips
$11.05
york johnson controls centrifugal chiller temp sensor
$25.00
lot of wire staples plus
$25.00
Yellow Jacket HVAC Gauge Set w/charging turn off valves
$35.00
NEW HVAC Parts! Paragon 8145-00 Defrost Timer
$81.00
1/4X5/16" Adapter Connector Coupler Ball Valve Set HVAC
$39.95
NEW HVAC Parts! Johnson P70MA-1C Dual Pressure Control
$26.51
Sussman Electric Boiler
$1800.00
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe
$2.95
BOILER CONDESOR EXCHANGER TUBE ROLL FLARING EXPANDER
$10.50
Alerton TX-SA Controller
$9.99
BOILER CONDENSOR TUBE COLLAPSING CHISELS WILSON TOOL
$9.95
Marley Cooling Tower
$500.00
A.O. Smith, Conserv. Direct Drive Blower Motor, 1/4 HP
$14.99
Century AC Blower Motor 1/4 HP 230v 60Hz 1 Speed
$100.00
(4) Branch St. Steel Manifold for Radiant Heating
$180.00
HONEYWELL PROTECTORELAY AND TRIPLE AQUASTAT COMBO
$29.99
BOILER CONDENSOR TUBE COLLAPSING CHISELS WILSON TOOL
$9.95
D701 Fasco Furnace Blower Motor 1/2HP 9.6 AMP NEW
$79.99
NEW Air Conditioning Troubleshooting HVAC Text Book
$21.99
1517 Misc. HVAC gage and hoses
$5.00
Mars Phase Fault Monitor Model# PFM-2000
$45.00
TIF Instruments XL-1A Refrigerant Leak Detector AC Tool
$40.99
LARGE WISS DUCKBILL TIN SNIPS SHEET METAL SHEARS V-19
$9.99
CARLIN FUEL OIL BURNER NOZZLE ASSEMBLY
$7.99
NEW - BELIMO DAMPER ACTUATOR AM24-SR ** REDUCED ** !
$34.95
VEECO SC-4 SENSITIVITY CALIBRATOR HELIUM LEAK DETECTOR
$36.12
york johnson controls centrifugal chiller temp sensor
$25.00
NIB~ HONEYWELL TRIPLE AQUASTAT L8124A 1015
$34.59
Kunkle safety relief valve 1 inch
$4.00
NEW HVAC Parts! WhiteRodgers 1609-101 Cooler Thermostat
$36.00
*Fieldpiece HS36 Stick Meter True RMS/Backlight **NIB**
$189.99
Electricity Refrigeration Heating Air Conditioning Book
$18.99
3 HVAC Condenser Pull Out Electrical Disconnect Boxes
$49.95
NEW HVAC Parts! Paragon 4001-00 Defrost Timer
$19.99
PENN-BASO SPDT TEMPERATURE CONTROLLERS CONTROLLER
$31.50
Robynair Vaccum Pump
$86.00
AC Manifold Gauges 2 Sets R12 Freon NR!!
$20.50
TIF Slimline Refrigerant Electronic Scale Model # 9010A
$49.99
UVC ultraviolet light DUAL UV LAMP Air Cleaner 36watt
$129.00
9000 Btu PTAC Package Terminal Air Conditioner Heating
$596.00
JB 4 VALVE ALUM 1/4 CHARGING TESTING MANIFOLD NEW 25158
$75.00
BOILER CONDESOR EXCHANGER TUBE ROLL FLARING EXPANDER
$9.95
Grundfos MQ3-45 96515515 Well / Booster Pump 1 HP 230V
$419.00
NEW HVAC Parts! Johnson Controls P70LB-1C DP Control
$63.00
Appion G5 Twin Refrigerant Recovery Machine
$200.00
NEW HVAC Parts! SUPCO EDT 11 Defrost Timer
$19.99
New Beckett Igniter 51824U, Ignitor Transformer
$9.99
SEIMENS; GMA161.1U DAMPER/ACTUATOR;OPEN AIR, NEW IN BOX
$10.50
BOILER CONDENSOR TUBE COLLAPSING CHISELS WILSON TOOL
$9.95
Johnson Controls AS-VAV110-1 Controller
$50.00
Siemens Terminal Controller Actuator Kit 550-065 NEW
$99.95
Air-Vac A/C Vacuum Pump Evacuation R-134A R22 R12 NEW
$29.99