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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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Monnier Automatic Float Drain Series 20-401 New
$4.99
R-410A / R410A INTERACTIVE TRAINING CD -New & Fast Ship
$24.99
CHROMALOX 2104-A0110 TEMPERATURE CONTROLLER ,NEW
$25.00
Tube & Shell Heat Exchanger 8" Dia x 60" Long
$200.00
JOHNSON CONTROLS THERMOSTAT DIRECT-ACTING SINGLE TEMP.
$4.99
Watts RA-1-AP Series Angle Steam Radiator Valves QTY 6
$47.99
DAYTON TUBE HEATER CONTROL BOX
$250.00
NEW COPPER FITTINGS 1 1/8"OD 90 ELBOW
$9.77
Reznor Model F165 Gas-Fired Unit Heater
$202.50
TIF Programmable Refrigerant Meter 9055 - NEW
$189.00
Honeywell L4017A1188 Fan / Limit Control 60 to 140 NOS
$42.50
Goodman Gas Furnace, 4.0 Ton, 70K BTU, 80% GMH80704BNA
$539.00
ZTECH 10" Round Barometer Bypass Damper
$39.00
AMETEK ROTRON 033461 BLOWER NEW
$9.99
VACUM PUMP * 6CFM VACUUM PUMP * DUAL VOLTAGE
$320.00
1/3 hp 460 volt 840 rpm 1phase condenser motor
$85.00
New! DAYTON,1HLA2 12" Shutter Mounted Exhaust Fan,115V
$128.00
Liebert Challenger 3,CU 69W, 208/3/60, Reheat, Humidity
$4995.00
RIELLO MODULE WITH EYE
$23.99
CHROMALOX AR-214 TEMPERATURE CONTROLLER ,NEW
$37.00
HONEYWELL DUAL AQUASTAT HEATING HVAC BOILER CONTROL
$30.00
MCDONNELL MILLER SA63-30 PT# 343400 FLOAT ASSEMBLY NIB
$49.99
New 8" Inch Inline Exhaust Cooling Duct Fan Vent Blower
$129.95
GOODMAN GkS 91155DXAD 2 Stage 95% Gas FURNANCE
$625.00
2 Gallon RCD #9 Mastic HVAC Duct Sealer Local Pick Up
$19.95
FAN EXHHAUST, 60 In,Less Drive Package
$989.95
Riello Capacitor for Riello Burners
$15.00
Goodman, Amana 2 stage Gas Valve NIB White Rogers HVAC
$45.00
RECLAIM MACHINE (BLUE RECLAIMER) * ALL REFRIGERANTS *
$525.00
Lot: 2 RFLS Series Refrigerant Couplings/Couplers, HVAC
$9.99
Two IS LKD100 Combustible Gas Methane Leak Detector
$19.99
Baldor 3 - 1.3 HP 3 Phase electric motor M1223T
$59.00
Loren Cook Exhaust Fan - Brand New
$300.00
Delta Ultrasonic Leak Detector AD-150 with Sensor Head
$175.00
SLOAN 110 REGAL XL FLUSHOMETER ,NIB
$35.00
NEW COPELAND SCROLL 2.5 TON COMPRESSOR ZP25K5E-PFV-830
$199.99
Honeywell Micro Switch Terminal Block 18PA1
$9.99
Luxaire Outdoor Condensing Unit - Luxaire: EESS48TAA
$695.00
CAPACITOR ANALYZER
$14.99
TLV 1/2" NPT THERMOSTATIC STEAM TRAP CF8 SS NIB 081E4
$29.99
2Stage Rotary Vane Deep Vacuum Pump 29.92" Hg 10Lb HVAC
$119.75
Johnson Controls Metasys NCM 401
$100.00
Argo Industries Circulator 3 Zone Control Board used
$30.00
NEW COPELAND 5HP PHASE R-2 COMPRESSOR CRN5-0500-PFV-970
$199.99
TACO 007-F5 CIRCULATOR PUMP HVAC BOILER HEATING
$45.00
Sporlan Thermostatic Expansion Valve Lot (9) CBIZE 3 /5
$39.00
Honeywell Part # 31075707 Digital Pre-Amp Assy
$24.99
NEW TRANE 15 TON 3D SCROLL COMPRESSOR PART# COM07558
$1000.00
Dual 134a / R-12 Aluminum Gauge Set with Hoses 98661
$118.65
Johnson Controls AP-VMA1420-0 Controller Metasys
$19.95
Liebert Glycooled HVAC Refrigeration unit, CK 061G-C00
$3995.00
blower motor
$0.99
HONEYWELL T675A 1003 COMMERCIAL TEMPERATURE CONTROL NEW
$149.99
new gibson/nordyne 3. ton a coil
$125.00
25 HP motor - used - $50
$50.00
3 HVAC GENERAL PURPOSE RELAYS 24V COIL
$9.99
POWERS 656-0014 3 Way Pneumatic Mixing Valve- New cond
$42.50
Fireye EP380 Programmer Module
$49.99
HONEYWELL AM101R-UT-1 THERMOSTATIC MIX VALVE
$72.00
Browning Pulley Wheel For Blower 10-081, 2AK114H *NIB*
$134.95
REFRIGERANT LEAK DETECTOR LS790B
$30.00
2 Carlyle R502 Freon 30 Hp Compressors with Condensors
$2500.00
GRUNDFOS CAST IRON CIRCULATOR UPS15-58FRC
$31.00
HONEYWELL ML8115B1004 HVAC DAMPER TWO-POSITION ACTUATOR
$95.00
SPP6 Solid State Relay Hard Start Booster A/C Capacitor
$14.99
Manuerop: Compressor MT22JC1P 208-230/1/60 *MANY NIB*
$157.50
*NEW* TEK-MATE Refrigerant leak detector
$85.00
New Suction Accumulator ~ Stops Compressor Slugging!
$9.99
Honeywell Focus PRO5000 Thermostat
$10.00
4 X 12 ACTIVATED CARBON FILTER HYDROPONIC ODOR SCRUBBER
$52.20
SUCTION LINE ( FILTER /DRYER ) ,3/4 Sweat I.D. PARKER
$18.95
Tecumseh Compressor: AV5546E 460/380V 60/50hz 3 PH NEW
$445.50
HONEYWELL V8043 E1012 Motorized Valve BRAND NEW!!!!
$0.99
DETECTO-PAK III GAS LEAK SURVEY EQUIPMENT EXCELLENT @
$499.00
NEW!!! ENERPAC Hydraulic Hand press GRAINGER
$169.00
brand new digital clamp clamp-on meter multimeter
$7.99
ROBERT SHAW THERMOSTAT
$10.00
Freon CFC HFC Halogen Gas Refrigerant Leak Detector A4
$21.99
NEW TRANE 15 TON 3D SCROLL COMPRESSOR PART# COM06438
$600.00
2pcs. ASCO 8317G035 VALVES , NIB
$25.00
19 Book CD * HVAC Air Conditioning | HEATING ManualsCD
$0.99
Electrolux E36DD75ESS Downdraft Ventilation System NEW
$51.00
Amonnia Receiver Serge Storage Tank 32" Dia x 72" Long
$1000.00
new gibson/nordyne 3 ton a coil
$125.00
Nelmor Blowers, Spencer Blowers 10 Hp, 4 in all
$950.00
ELECTRONIC SIGHT GLASS
$14.99
New Halogen Refrigerant Freon Leak Detector HVAC/R Tool
$49.95
Fireye EP390 Programmer Module
$49.99
Parker - Liquid Line Filer Dryer
$9.99
NEW BROAN 110 CFM BATH FAN 110CFM BATHROOM FANS 676
$54.99
Used Twin City Fan & Blower Size 245 Type BCV 7.5HP
$500.00
CLARCOR AIR FILTERS HE40 SIZE 24X24X4 6 FILTER/ CASE
$59.99
HONEYWELL IS20327 FURNACE PRESSURE SWITCH NEW
$59.99
Lot 5 Rheem Air Handler Control Boards P/N 47-100436-05
$19.99
McQuay 20 Ton Chilled Water Supply
$14100.00
Sporlan - Solenoid Coil Kit
$9.99
Low voltage control system White-Rodgers
$5.50
NEW HONEYWELL PRESSURETROL CONTROLLER PA404A 1009 NEW
$79.99
JB Refrigerant Guages w/4' Yellow Jacket Hoses ~estate~
$19.99