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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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Reliance Electric Blower
$39.99
Emerson Oil Burner Motor
$6.99
NEW DiversiTech GG-1 Drain Clearing Gun NIB
$20.00
McDonnell & Miller low water cut-off
$15.50
YORK HEAT PUMP SERVICE ANALYZER DIGITAL IN CASE
$19.95
NuCalgon C-4 Mineral Refrigeration Oil SUS300
$0.99
WHOLE HOUSE ATTIC FAN - 30" - 1/2 Hp - 115V - 6,900 CFM
$511.00
ROBINAIR 14664 COMPRESSOR MOTOR TEST CORD WITH CASE
$9.95
Halogen Refrigerant Leak Detector HVAC/R Tool New Model
$99.00
JOHNSON CONTROLS HE-67N3-1B00W HUMIDITY ELEMENT SENSOR
$70.00
A/C MANIFOLD GAUGE SET A C R134a W/ CARRYING CASE
$0.99
Belimo AF24-MFT US Proportional damper actuator
$19.99
WTT SWEP BRAZED PLATE HEAT EXCHANGER EVAPARATOR WP4-50
$184.49
MARS 50304 Control Transformer New in the Box
$0.99
CARLIN UNIVERSAL IGNITOR KIT
$90.00
NEW Carrier Comb. Gas Valve EF33CB271 - 400000 BT
$28.95
TOTALTEST KIT R22 & R12 ACID - MOISTURE TESTER IN CASE
$19.95
GAS VALVE EF 33CB 241 COMB GAS VALVE NEW IN BOX
$99.99
15% SILVER SOLDER MADE BY WOLVERINE SILVALLOY BRAZING
$15.50
BRAND NEW 250 FEET 18/8 T-STAT WIRE STILL IN WRAP!!!!!!
$13.15
GM40 MULTI-VOLTAGE TIME CLOCK NOW RATED AT 40 AMPS NIB
$26.51
DELOREAN. DMC-12.R-12 FREON HOSE. AC REFILL HOSE. R-12
$17.00
EXHAUST FAN Commercial - Direct Drive - 24" - 1/2 Hp
$422.00
Honeywell L4064B 1592 Combo Fan & Limit Control Heating
$26.00
NEW!! FlowPro Industrial Pedestal Fan-30"
$199.95
Johnson Controls universal replacement pilot switch NEW
$0.99
Ritchie Yellow Jacket 69365 AccuProbe Leak Detector
$129.00
TOTALTEST KIT R22 & R12 ACID - MOISTURE TESTER IN CASE
$19.95
NEW Grasslin DTMV40 Defrost Timer
$36.00
Honeywell R8239A 1052 Fan Center Relay
$4.99
8 HEATING VENTILATION AIR HVAC TRAINING COURSES CD -NEW
$7.99
tif 5500 HALOGEN LEAK DETECTOR WITH CASE
$19.95
NEW Three Phase Line Voltage Monitor ICM ICM450C
$7.50
JOHNSON CONTROLS motor actuator AP-VMA1420-0 NEW
$80.00
Carrier/Bryant TXV kit for 1.5 - 2.5 tons R-410
$0.99
REFRIGERATION GAUGES TOOLS PARTS TAKE A L@@K $$$$$
$36.00
Honeywell 8" fan limit new
$0.99
YOKOGAWA HALOGEN GAS MONITOR
$149.99
JOHNSON CONTROLS rotary actuator m9206-BGA-2 NEW
$30.00
KELE Sequencer Control Module Four Stage MODEL UCS-421E
$40.00
Ametek Windjammer Brushless Blower 240V 3.5A 117650-01
$35.00
15% SILVER SOLDER MADE BY WOLVERINE SILVALLOY BRAZING
$21.51
NEW C&D Core Removal Tool CRT CD3900
$19.50
ASCO COIL NIB 120 VAC
$15.00
Carrier 3 wire pilot burner assembly
$11.49
Vaneaxial fan Twin City 28B5 , 7.5 hp unused
$1950.00
Taco Circulator 007 -F5
$26.01
HONEYWELL STACK RELAY SWITCH RA816A CONSTANT IGNITION
$9.95
Carrier transicold Valve 14-00212-03sv
$24.95
carrier hk 02EB 024 pressurestat open 24 psig close 48
$20.00
Carrier Synthetic Centrifugal Compressor Oil POE
$22.01
Carrier Synthetic Centrifugal Compressor Oil POE
$22.00
ATP FAN BLADE PITCH GAUGE
$8.95
R-22 REFRIGERANT NEW WITH FACTORY SEAL 30 POUNDS
$81.00
REFRIGERANT 408A NEW
$153.50
INFICON D-TEK REPLACEMENT BATTERIES PLUS, MORE, MORE
$5.50
Trane YCC Gaspack Flue Collector Box
$0.99
Refrigeration & Air Conditioning Home Training Course
$99.00
Honeywell 2075011 Gas Control Heating New in the Box
$1.25
HVAC FLUKE CO-210 CARBON MONOXIDE PROBE WITH CASE
$58.57
FLUKE EM100A ELECTRONIC MANOMETER WITH CASE AND EXTRAS
$59.95
Honeywell S86E 1002 Intermittent Pilot Control Module
$0.99
NEW 35,000 BTU EMPIRE HEATER, WITH UPGRADED MOTOR. NEW
$399.00
ATCO 12" NON INSULATED CLASS 1 FLEXIBLE AIR CONNECTOR
$19.99
Carrier Synthetic Screw Compressor Oil SW220 POE
$22.49
SUPCO VG60 VACUUM GAUGE--NR
$34.95
DWYER MAGNEHELIC WITH A HARDSHELL CASE
$22.50
Spark Resistant Blower,24 In,Less Dr Pkg
$599.00
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC
$169.95
MASTER FUEL INJECTION PRESSURE TEST KIT & CARRYING CASE
$6.01
Echelon 44101R TP/FT-10 Bus Terminators LONWORKS® NIB
$10.00
Honeywell L8148A 1017 Aquastat Relay
$36.00
brass shut off valve large new radiator flushing water
$0.89
Flex - Tube Man-o-meter
$25.00
MAC Air Conditioning Leak Seeker
$20.00
Heating Coil Integral face , L J Wing , B-36
$450.00
Squirrel cage blower wheel
$10.00
Halogen Gas HFC CFC Refrigerant Leak Detector Checker
$11.00
New Suction Accumulator ~ Stops Compressor Slugging!
$9.99
Delavan oil nozzle tool and 24 oil nozzles
$0.99
HONEYWELL STACK RELAY SWITCH RA816A CONSTANT IGNITION
$9.95
Infrared Laser Thermometer Mannix Model IRT2 HVAC Tool
$14.05
YORK HEAT PUMP SERVICE ANALYZER IN CASE
$19.95
T. Wilson CO. - Boiler Tube & Flue Cleaner - Air Driven
$100.00
ROBERTSHAW GAS VALVE 7200DER 2-6 (NOS)
$1.50
Carrier Synthetic Screw Compressor Oil SW220 POE
$22.49
Cal-Shield Evaporator and Condenser Coil Protectant
$0.99
Fasco furnace stove fireplace blower squirrel cage fan
$16.00
10" WALL SHUTTER
$7.50
HONEYWELL BURNER MANAGEMENT CONTROL RM7800L1012 NIB
$650.00
ThermalZone Akylbenzene Refrigeration Oil ISO200
$0.99
WHITE RODGERS DIGITAL THERMOSTAT **NEW**
$0.99
FIREYE E-110 COMPLETE BURNER CONTROLLER W DISPLAY USED
$112.50
R22 Freon
$56.00
Trane variable speed drive module for blower motor
$40.00
Honeywell R8184G 4009 Intermittent Ignition Oil Primary
$9.99
Testo model 523 Refrigerant System Analyzer *new in box
$300.00