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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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TACO MODEL 5000 MIXING VALVE (USED)
$17.27
INFICON VORTEX Refrigerant AC Recovery unit Machine
$191.51
3 ACCO Helicoid Test Pressure Gages Gauges 500-3000 PSI
$49.99
EMERSON CONDENSER FAN MOTOR NEW 1859 K55HXSSM 7146
$39.99
Marathon 1/3 HP 115 V Electric Motor 4406 5KH32FN5586AX
$15.50
2 Sanyo Air Condition refrigeration condensor unit A/C
$900.00
Evapco Stainless Cooling Tower, Used.
$17500.00
WHITE-RODGERS IGNITION DETECTION CONTROL 50A47-82 50a47
$10.00
New Honeywell VisionPro 8000 Touchscreen TH8320U1008
$53.23
HONEYWELL AM101R-UT-1 THERMOSTATIC MIX VALVE
$72.00
NIB 4 inch 152 cfm ELICENT INLINE FAN W/POWER CORD!
$135.00
Robinair VacuMaster 15600 6cfm Vacuum Pump XLNT CONDTN
$139.99
2 Crosby Pressure Gauges #A1H 1000 PSI #AAO 60PSI NICE!
$49.99
NEW AMETEK BRUSHLESS BLOWER
$60.00
carrier vav and damper control 33cs new in box
$75.00
ICM CONTROLS. ICM450. 3 PHASE VOLTAGE MONITOR
$52.00
Camfil Farr 2' x 4' Panel Filter Lot of 3 CleanRoom NEW
$300.00
WIKA 5000 PSI Glycerine Liquid Filled SS Pressure Gauge
$49.99
honeywell excel 10 vav and damper control
$49.00
ANDERSON GENERAL IMPERIAL FLARING CUTTER CHAMFER TOOLS
$9.99
NIB CARBON FILTER 375 CFM HYDROPONICS
$125.00
Liquid Line Filter Drier 5/8 Flare 41 cu. in.
$0.99
Control Instuments monitor flammable gas vapor Analyzer
$799.99
HVAC MICRON VACUUM GAUGE THERMAL REFRIGERATION TESTER
$21.38
NIB 8 inch 635 cfm ELICENT INLINE FAN w/POWER CORD
$200.00
HONEYWELL AM101R-UT-1 THERMOSTATIC MIX VALVE
$72.00
Blower Assembly, 2000 CFM 3/4 HP 208/230V
$98.50
NEW MILWAUKEE 18GA SWIVEL HEAD SHEARS # 6850
$51.00
BACHARACH SLING PSYCHROMETER PGH, PA
$20.50
NIB CARBON FILTER 275 CFM HYDROPONICS
$100.00
TX5N4 Expansion Valve Kit (HVAC) R410-A Or R22
$39.99
25' Flexible Duct Hose for 20" Vent Ventilation Blower
$79.99
Honeywell Super Mod Motor Spring Return M955A1024
$199.00
REZNOR FAN POWERED UNIT HEATER UDAS 45S
$132.50
Inficon D-Tek Select
$200.00
Honeywell C7012E Solid State Ultraviolet Flame Detector
$20.00
Goodman Furnace Ignitor B1401009 Norton 271NM 41-412
$14.95
WINEMATE 8500HZD COOLING UNIT GREAT CONDITION Used
$350.00
BRUTE YELLOW JACKET TEST/CHARGING MANIFOLD NICE!!
$51.00
R-410A / R410A INTERACTIVE TRAINING CD -New & Fast Ship
$19.75
Emerson Electric unit heater
$300.00
SANYO & MITSUBISHI REMOTE CONTROLLERS (NEW)
$9.99
Lot of 8 Scully Oil Tank Econ-O-Gages 01421 1401421
$28.77
Lot of 7 Scully Oil Tank Fill-Signal Alarms 00275 2"
$5.99
TACO POWER HEAD NIB ONE DAY ONLY (( FREE SHIPPING))
$0.01
MALCO SC-1 HAND CRIMPER
$8.00
INFICON 714-202-G1 REFRIGERANT RECOVERY MACHINE NR
$162.50
NIB 8 INCH FANTECH FX8XL 521 CFM INLINE FAN W/CORD
$200.00
BELIMO DDC HOT WATER VALVE FOR HVAC
$26.00
KURZ SERIES 490 MINI-ANEMOMETER
$20.50
TIGERLOOP OIL DE-AERATOR 69R4 MODEL TN FOR OIL BURNERS
$24.99
Asco Gas Vent Valve 3/4"
$20.00
HONEYWELL TRIPLE AQUASTAT RELAY L8124A 1007 NEW IN BOX
$79.99
IMPERIAL EASTMAN 364-FHA TUBE TUBING BENDER 5/8" 2 1/4R
$15.50
Johnson Controls Metasys DX-9100-8990 Mounting Base
$107.50
Johnson Controls P70DA-1C High Pressure Lockout Switch
$24.00
Digital Vacuum Gauge DV-22N
$113.50
Sid Harvey's 250-48 Micro-Flow Oil Filter Elements
$3.00
SNAP-ON AIR CONDITION GUAGES W/ HOSES
$54.99
Two New Liebert Refrigerant Muffler S6032.
$24.99
Johnson Controls P70AA-118E Fan Cycling Switch
$24.00
Johnson Controls METASYS TC-9102 Fan Coil Unit Control
$14.99
NEW 18x18 Greenheck Relief Hood (Aluminum) W/ Curb
$99.99
SOLVENT RED 175 40.LB PAIL
$640.00
HVAC Carrier Parts - Circuit Board, NIB CB010-1
$100.00
HONEYWELL AM101R-UT-1 THERMOSTATIC MIX VALVE
$72.00
MOVINCOOL CLASSIC PLUS 26
$750.00
honeywell excel 10 vav controller
$49.00
Energy Saving Thermostat, Aube TH108-A-347S3
$19.50
AIR CURTAIN ,3800 FPM
$299.95
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe
$2.95
NEW DAYTON 16" AIR CIRCULATOR
$39.99
NIB 6 inch 309 cfm ELICENT INLINE FAN W/POWER CORD.
$160.00
EWC ND 8X12 MOTORIZED DAMPER 24VAC 50/60Hz
$39.95
NIB Honeywell Valve Solenoid Vent Type V4297s1003
$9.99
Johnson Controls Metasys DX-9100-8454 Digital Controler
$156.50
Andover controller W/ 2 static pressure inputs TCX 853
$25.00
HONEYWELL MOTORIZED VALVE V8043 F 1036 NEW IN BOX
$51.00
White Rodgers Direct Spark Ignition Control 50D21
$99.00
A/C,PORTABLE ,10000btuh MADE BY MOVINCOOL
$1695.95
WHITE ROGERS Comfort Set Thermostat
$15.00
Honeywell R81846 4009 Protectorelay oil burner control
$29.82
EMF 20 SPARE MIST ELEMENT P/N A22304199 QTY 5 NIB
$29.99
VES Pittsburgh Lock Hammer Pistol or Inline Grip-NR
$125.00
New in box Honeywell v8043 F 1036
$46.53
(1747-21) CERABLANKET, 50’ Roll, new
$49.99
NEW Trane Scroll 15-Ton 230/460 HVAC Compressor
$350.00
Understanding TXV Refrigeration Systems
$22.95
MAXON C-1450-12 242 CFM SERIES FG PRESSURE BLOWER/FAN
$150.00
Johnson 50 to 250 Degree Duct Thermostat A19EBA C PENN
$0.99
Siebe, Barber colman, Invensys damper actuator HVAC
$19.99
LoadCalc Plus 2008 HVAC/R Load Calculation Software
$49.95
Trane Modular Climate Changer Coil/Air Filter+3HP Fan
$879.99
NRP LV2000 Refrigerant Recovery Unit
$11.00
Refrigeration Fundamentals For HVACR (E-BOOK) on CD
$19.95
Honeywell RA832A 1066 Switching Relay NIB
$8.99
Lot of 4 Linebacker Voltage Protectors EAC400 NIB
$6.50
EXPANSION TANK 4.4 GAL / BOILER INSTALL KIT
$92.00