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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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R410A Manifold Gauge 5ft Hoses HVAC/R Professional Tool
$89.75
VACUUM PUMP FREON R22 R410 R134 R12 1/8 HP 3450 RPM
$123.88
Halogen Gas Refrigerant CFC HFC Leak Detector V2T
$23.97
RefrigerationTemp. Control "Johnson Control"
$30.99
Dual Gauge Manifold 5ft High Pressure Hoses AC/HVAC R22
$75.00
Port-A-Cool PAC2K163SFC Evaporative Cooler - Brand New!
$1049.00
R-409A REFRIGERANT
$500.00
HVAC
$300.00
1/4X5/16" Adapter Connector Coupler Ball Valve Set HVAC
$9.95
Lot of 4 Taco #951-3161RP Pump Seal Kits
$3.00
Cooling Tower 58 Tons
$199.00
good condition commercial fan
$200.00
HVAC Blower Motor
$25.00
Dwyer Sight Glasses - 3 - Used Measure GPM
$4.99
A/C MANIFOLD GAUGE SET A C R134a W/ CARRYING CASE
$0.99
HVAC /Plumbing PVC Glue
$5.00
HVAC Blower Motor
$25.00
NEW DOSIVAC VACUUM PUMP 1.3 CFM HVAC 110/230V SAVE BIG!
$96.98
SOLENOID VALVE 3/8" ODF SOLDER
$13.99
ID REFRIGERANT HVAC GAUGES
$22.49
60" HVAC A-C Refrigeration Charging Hoses RYB NEW
$25.95
FS4-3 McDONNELL & MILLER FLOW SWITCH 1" NPT
$50.00
16" CAST ALUMINUM FAN BLADE INDUSTRIAL
$9.99
Commercial Air Conditioner Carrier Roof Top Unit (RTU)
$6437.50
New 8" Round Krueger Steel Louvered Diffuser Model 1400
$44.66
White Rodgers 8A04-1 Fan Relay 24 v coil SPDT Switch
$0.99
RefrigerationTemp. Control 1609-101
$19.99
Halogen Refrigerant Freon Leak Detector AC/HVAC/R Tool
$69.95
11 Schaefer Flue Condensor Brush NIB Brush Lot New NR
$9.62
HVAC 6x10 Floor Registers
$5.00
Fieldpiece HS36 Stick Meter with True RMS and Backlight
$199.99
HEAD PRESSURE FAN CYCLING ( P70AA-118C )
$47.99
SIT - 820 NOVA LP Valve, 4-way pilot, igniter & flex
$50.00
New 12" Round Krueger Steel Perforated Diffuser 6500
$43.66
RobinAire 5CFM VACUME PUMP *BRAND NEW* 15500
$99.99
NORGREN OIL REGULATOR (WASTE OIL)
$49.99
TurboTorch 'B' Reg, Handle, Hose, Tank Key, & (2) Tips
$66.00
SIT - 820 NOVA NG Valve, 4-way pilot, igniter & flex
$50.00
Refrigerant R22
$89.99
INFICON D-TEK REFRIGERANT LEAK DETECTOR
$22.49
Rego Twin Stage Regulator LV404B23 NEW
$12.87
Robinair Refrigerant Recycling Machine
$125.00
New 10" Rnd. Krueger Steel Louvered Diffuser Model 1400
$44.66
combustion
$175.00
XPT DLT8-1800 Duct Leakage Tester (8 inch)
$3999.99
honeywell genetron R-22 cylinder 20lbs left
$65.00
2Stage Rotary Vane Deep Vacuum Pump 29.92" Hg 10Lb HVAC
$117.95
JOHNSON CONTROLS REFRIGERANT LEAK DETECTOR RLD-H10G-1
$280.00
Fieldpiece Superheat Head M# ASH3 NEW
$78.00
Fieldpiece Psychrometer Head M#ARH4 NEW
$54.00
6 NEW ROLLS HVAC FOIL TAPE - NASHUA & VENTURE TAPE - NR
$9.95
R22 NEW IN BOX NEVER USED
$89.99
Fieldpiece Infrared Temp Head M#ATIR3 NEW
$49.95
SIT - 820 NOVA LP Valve, 4-way pilot, igniter & flex
$50.00
HVAC Overflow Float Switches
$4.99
Liebert Challenger 3000 3 Ton Upflow with Condenser
$1950.00
XPT DLT5-600 Duct Leakage Tester- (5 inch)
$2999.99
Johnson Control Air Regular & Oil Removal Filter
$25.00
New 10" Round Krueger Steel Perforated Diffuser 6500
$43.66
ASCO RED HAT 8210G95 SOLENOID VALVE NIB 120V 3/4 PIPE
$41.00
Halogen Refrigerant Freon Leak Detector Air Pump HVAC/R
$99.00
A/C CAPACITORS
$10.00
19 Book CD HVAC * Air Conditioning ! HEATING Manuals CD
$0.99
Flexible Braided Hose with Ball Valve 1 inch MPT NEW
$19.99
EVAPORATOR PRESSURE REGULATING VALVE 1/2"
$31.99
12000 Btu PTAC Package Terminal Air Conditioner Heating
$658.00
Vacuum Pump Robinair 15600 6 CFM 2 stages
$179.99
Baltimore Aircoil Cooling Tower 225 ton
$3500.00
HONEYWELL SMARTVALVE SYSTEM CONTROL SV950 1M 2528
$74.99
SIT - 820 NOVA NG Valve, 4-way pilot, igniter & flex
$50.00
TANK R-404A REFRIGERAT " New"
$190.99
SILVALOY BRAZING RODS SILVER SOLDIER 5% COPPER AC BRASS
$23.28
BELIMO MFT-H ACTUATOR SET UP KIT COMPLETE EX.
$99.99
19 Book CD * HVAC Air Conditioning | HEATING ManualsCD
$0.99
XPT DLT6-1200 Duct Leakage Tester - (6-inch)
$3499.99
BECKETT Fuel Oil Burner Head
$0.99
combustion
$300.00
Fieldpiece Carbon Monoxide Head M# ACM3 NEW
$49.95
IMPERIAL USA HVAC GAUGES
$20.24
Modine Gas Heater Model PA105AF
$75.00
New 12" Round Kruege Steel Louvered Diffusers Model1400
$44.66
Lot 4 Braided Bellows Connectors 2.5 and 2 inch MPT
$49.99
Pressure Switches
$25.00
New 6" Round Krueger Steel Louvered Diffuser Model 1400
$44.66
TURBO 200 UNIVERSAL CAPACITOR
$19.99
VICTOR TURBOTORCH NITROGEN REGULATOR, 0-500 PSIG (NEW)
$45.00
RefrigerationTemp. Control "Johnson Control"
$30.99
New in Box JOHNSON CONTROLS TE6700 2nd Gen. Temp Sensor
$4.99
RANCO ELECT. TEMP. CONTROL MODEL ETC-111000
$39.99
Brazed 30 Plate Stainless Steel Heat Exchanger
$115.00
Estwing sheet metal tinners hammer leather HVAC 18oz.
$9.95
Commercial Air Conditioner Carrier Roof Top Unit (RTU)
$6437.50
Fieldpiece Vacuum Gauge Head M# AVG2 NEW
$49.95
WASTE OIL HEATER BLOCK (CLEAN BURN CB2000/4000 BURNER)
$50.00
C31- Lot of 2 ASCO Red-Hat Valves T 410372 8264G9 1/8NC
$9.99
CONDENSATE DRAIN PAN 115V
$10.99