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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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MOBILECOOL 290000 BTU PORTABLE AIR CONDITIONING CHEAP
$2000.00
1 1/2" Brass Ball Valve w/ Actuator mounted on top NIB
$19.00
Liebert DELUXE SYSTEM 3 10 TON UPFLOW HVAC
$10500.00
BELIMO DAMPER ACTUATOR AF-24 MFT US 133 in-lbs
$34.00
Boiler & Water Heater Immersion Wells 121371M or C347-8
$18.25
HONEYWELL L4080B 1352 HI-LIMIT AQUASTAT NEW NIB
$20.00
Boiler & Water Heater Immersion Wells 121371B or C347-3
$13.75
Liebert DELUXE SYSTEM 3 15 TON Downflow Econocoil
$12500.00
Bell & Gossett: Expansion Tank- 15 Gallon, New- PSI 375
$250.00
NEW COPPER P-TRAP 1 1/8" Refrigeration
$19.98
12pcs. SPORLAN RPE-48-BD SUCTION FILTERS ,NIB
$25.00
DAYTON 3C428 Blower 20" Wheel Belt Drive Double Inlet
$449.99
NEW COPPER FITTINGS 1 1/8"OD 90 ELBOW Refrigeration
$34.98
Combustion Analyzer - Bacharach Model 40, Complete
$255.00
Suntec B2VA 8216 or P4-70R
$62.70
BELL & GOSSETT 1/6 HP NEW STYLE H/V or A28-24R
$116.40
AMERON BONDSTRAND M74 FIBERGLASS PIPE SHAVER
$250.00
Honeywell R8184G 1005 or P75-39R
$40.15
Sensor Tip Halogen Refrigerant Freon Leak Detector Tif
$24.95
Honeywell Modutrol Motor M204A27DS4
$0.99
BELIMO DAMPER ACTUATOR AF-24 MFT US 133 in-lbs
$34.00
HONEYWELL R7847 C 1005 FLAME AMPLIFIER ,USED IN BOX
$20.00
TRANE DEFROST RELAY FOR HEAT PUMPS
$10.00
LAU Blower Assembly 20" Wheel Belt Drive Double Inlet
$349.99
Macon Controls #10857 Radiator Valve
$14.85
WATER HEATER FROM THE WOOD STOVE TO HEAT THE HOUSE
$9.99
25 NEW COPPER FITTINGS 7/8"OD 3/4"ID FEMALE ADAPTERS
$39.98
Boiler & Water Heater Immersion Wells 121371A or C347-2
$12.70
R 410A Superheat Subcooling Calculator Charging Chart N
$8.35
Evcon Packaged Unit Air Conditioner 4-Ton
$800.00
HVAC Tool Set - 27 Pieces with Bag
$500.00
WEG 1/3 HP Condenser Fan Motor 115-208/230V 1 Phase NIB
$49.99
HONEYWELL S688A 1007 AIR FLOW SWITCH BNIB
$2.25
Rudd/Rheem furnace board ST9101A 1014 or 47-22827-03
$20.00
controls and boards
$175.00
Honeywell L4081B or C322-4R
$74.65
Honeywell R8182H 1005 or R80-40R
$194.85
BOILER , NATURAL GAS MADE BY HYDROTHERM
$1895.95
BRAND NEW!! Honeywell Zone Valve V8043 F 1036
$55.00
HONEYWELL UDC 200H-2-000-1D0000-0 MINI PRO CONTROLLER
$25.00
Fasco Squirrel Cage Fan Blower 110 115 Volt 2930 RPM
$37.88
R 22 Superheat Subcooling Calculator Charging Chart N
$8.35
NEW UEI DM397 True RMS Digital Multimeter / HVAC 1000v
$199.99
Suntec A1VA 7112 or P4-83R
$51.25
Industrial Fan, 48,000 CFM, Blower, Dryer
$1000.00
LENNOX 20 TON ROOF TOP UNIT
$1.00
25 Replacement Fan Blades for Coolers
$19.99
Luxaire 4 Ton Outdoor Air conditioner. HASE-T048SA
$695.00
NEW HVAC PARTS! Heatcraft Interlink 5008TS Motor (4
$27.00
WHITE-RODGERS 36C03 400 MANIFOLD GAS VALVE
$19.95
30KW Nuptronic SK300 Humidifier Sterile Steam microproc
$600.00
Siebe Low Temperature Manual reset Control Freeze stat
$9.77
3 phase electric heater
$150.00
Viessmann Vitodens 200 -Wall Hung Condensing Boiler
$6400.00
Halogen Refrigerant Freon Leak Detector HVAC R22/R134A
$67.75
Honeywell L8148A or C312-8R
$88.56
Honeywell R8182D or R80-30R Triple Aquastat Relay
$174.58
Boiler & Water Heater Immersion Wells 121371L
$16.40
Honeywell Tradeline Programmable Thermostat T7350D 1008
$30.55
INDUSTRIAL SIZE NATURAL GAS HEATER
$300.00
BELIMO DAMPER ACTUATOR AF-24 MFT US 133 in-lbs
$34.00
BELL & GOSSETT B&G NRF-22 WATER STOVE CIRCULATING PUMP
$82.95
NEW GAS BALL VALVES 1/2" FPT x 1/2" FPT LOT OF 10
$36.98
Honeywell R8184M or R75-58R
$82.25
Honeywell R8184G 4009 or P75-40R
$40.15
Suntec B1VA 8212 or P4-60R
$62.65
NEW HVAC PARTS! 115 Volt 50 Watt Electric Motor (5
$21.99
Suntec A2VA 7116 or P4-91
$35.00
T-25 FRP Cooling Tower, 3.75 CTI/T, New, w/Warranty
$723.00
BOILER HOT WATER HEATING SYSTEM WOOD GAS OIL COMBINED
$9.99
BELL & GOSSETT 1/12 HP NEW STYLE or A28-15R
$82.25
COPLEAND COPELAMETIC CONDENSER WSWM-0075-TAC-001
$299.00
3 Ton Chiller Process Air Cooled Chiller 5 7 10 12 15
$5190.00
WATER HEATER FROM THE WOOD STOVE TO HEAT THE HOUSE
$9.99
A/C,SPLIT SYSTEM WITHOUT DUCT ,12.3 MBtuH,115v
$899.95
WIKA #4343417, 2 1/2" VAC /PRESSURE GAUGE, 30" - 60 PSI
$2.99
Honeywell Cad Cell Replacement Eye OC-10 or F063-0485
$3.15
YELLOW JACKET SUPEREVAC 6CFM ( BRAND NEW NEVER USED)
$150.00
A.O. SMITH C661V1 3/4 HP Condenser Fan Motor 230/460V
$79.99
thursh 1/2 hp circulator pump& motor
$25.00
DIGITAL SENSOR Antunes Adjustable Inputs PN 8563120030
$25.99
T-250 FRP Cooling Tower, 37.5 CTI/T, New, w/Warranty
$2554.00
FANTECH FRD24-14 Inline Centrifugal Duct Fan NIB
$499.99
Carrier Part# 16B4-1551 Octyl Alcohol 16B41551
$113.19
HONEYWELL INTERMITTENT IGNITION OIL PRIMARY
$9.95
NEW DUCTWORK ESTIMATING FOR HVAC MANUAL
$14.95
Webster M34D or P6-31R
$60.72
(2029-12) Condenser Core, new
$34.95
Honeywell Modutrol IV Motor M4182B1002 (A1A)
$65.00
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC
$159.95
BELIMO DAMPER ACTUATOR AF-24 MFT US 133 in-lbs
$34.00
HONEYWELL S 7800 A 1001 KEYBOARD DISPLAY MODULE , USED
$28.00
Universal 150FAS 150,000 BTU Propane Blower Heater Used
$60.00
M 20 Plate Copper Brazed Heat Exchanger Water Beer Wort
$99.00
SPORLAN OVE-30-CP100 Thermostatic Expansion Valve R22
$14.99
60KW Nuptronic SK300 Humidifier Sterile Steam microproc
$750.00
TRANE DEFROST TIMER FOR HEAT PUMP
$10.00
BARBER COLMAN EA71 INDUSTRIAL ACTUATOR, NEW
$59.99
NEW HVAC Parts! Johnson P70AA-118C Fan Cycle Control
$26.00
NEW HVAC PARTS! 230 Volt 50 Watt Electric Motor (11
$33.00