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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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Mountain 3.0 Single Stage Deep Vacuum Pump NEW

$137.99
Electronic Freon Leak Detector CPS Model L790a

$15.00
Dual 1/4" & 5/16"Valve Core Remover/Installer AC/HVAC

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Replace Sensor Halogen Refrigerant Freon Leak Detector

$17.95
Johnson Controls NXA-PEC-01 LONWORKS® NIB

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Dunham Bush Outdoor M# WC8A Water Cooled 8 Ton Chiller

$2495.00
NEW COMAIR ROTRON BD24A3 DC BLOWER FOR EN60950 24V/48A

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Cylon Unitron DDC HVAC Controllers (Lot of 4)

$30.00
Cutler-Hammer 40 amp 2 pole contactor

$10.00
Vacuum Gauge

$7.99
R407C REFRIGERANT NEW NEVER OPEND 25 POUND

$50.00
Halogen Refrigerant Freon Leak Detector AC/HVAC/R Tool

$69.95
(4) New GE ASP 4124-53 Switches, Switch 120V/240V 17A!!

$9.99
ASCO REDHAT solenoid valve 8215G030 120/50 110/50 NIB!!

$59.99
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe

$2.95
Lennox 1750m RELATIVE HUMIDITY room SENSOR 17m5001

$9.99
Electronic Halogen Refrigerant Leak Detector w/Air Pump

$99.95
Johnson Controls NXT-INT-01 LONWORKS® NIB

$20.00
NEW EBM RL90-18/00 AC FLATPAK BLOWER 115VAC/20W/25CFM

$21.99
DELOREAN. DMC-12.R-12 OIL CHARGE FOR A/C.DMC-12

$17.00
Manifold Gauge 5'High Pressure Hose HVAC R134/R22/R404

$75.75
2 Stage Rotary Vane Deep Vacuum Pump 29.92"Hg 2CFM HVAC

$119.95
Trane rupture guard 4"

$99.00
GREENLEE 46020 PUNCH DOWN IMPACT w/ 2 CUTTERS 66, 110

$42.99
DELAVAN 2IN 1 NOZZLE CHANGER NEW IN PACK

$19.00
ROBINAIR TEMPERATURE TESTER #12860 WORKS W/INSTRUCTIONS

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Pneumatic Piston Autuator

$40.00
Infrared detector hot water leak locator pipe new Wow !

$1.00
HONEYWELL EXCEL 10 - SMART VAV ACT W7751H2025 Lonworks

$50.00
Trane Voyager Series RTU -- Complete set Control Mods.

$100.00
FIREYE BURNER CONTROL E110,EP160, E1R1, ED510

$649.99
new copeland sentronic & oil pressure control

$9.99
50 Lb. R-134a A/C Tank

$228.95
New 6" Round Krueger Steel Louvered Diffuser Model 1400

$44.66
Pocket Air Filters for Industrial Air Handler 20x20x15

$20.00
Honeywell Lennox Electronic Thermostat, T7047C

$4.99
NEW AIR SYSTEMS INTER.Vinyl Hose Ducting SVH-6 8" X 6'

$4.99
New USA 30lb Refrigerant R134a R-134a R134-FREE FREIGHT

$125.00
EXHAUST FAN Commercial - Direct Drive - 16" - 1/4 Hp

$336.00
Best Exhaust Fan (EB15)

$100.00
Uniweld Liquid Filled Gauge 200 psi 1/4 2.5" Stainless

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Action Aire 1/4hp 3spd Non Reciprocating Fan Motor NEW

$69.00
(4) New GE ASP 4124-49 Switches, Switch 120V/240V 17A!!

$9.99
Gas Test Gauge 30 PSI Pressure Max. 1" FPT

$9.00
Infrared/Laser Temperture Meter -4 to 604 Deg. F. -NEW

$49.99
Johnson Control Air Regular & Oil Removal Filter

$25.00
ROBINAIR Manifold Gauges for R12 & R22 w/Hoses

$22.95
1 NEW HAMMOND SKT011419NO THERMOSTAT KIT

$7.99
TIF Electronic Refrigerant Charging Meter/Scale - HVAC

$49.99
R407C REFRIGERANT NEW NEVER OPEND 25 POUND

$25.00
Large 2 oz Compressor Oil/Dye Screw-in Injector AC/HVAC

$57.75
Liebert 21 Ton Water Cooled Chiller Rack Unit M#-CH-21G

$2495.00
Refrigeration & Air Conditioning 4 Part Course 488 pgs

$7.99
Yokogawa H10X PRO/MARS TOP GUN 2 REFRIG. LEAK DETECTOR

$49.95
SERCON 4000 ACID PURIFICATION MACHINE LOW HOURS LOOK NR

$395.00
New 12" Round Krueger Steel Perforated Diffuser 6500

$43.66
36" HVAC Refrigeration Refrigerant Charging Hoses

$18.95
Trol A Temp honeywell MM-2 zone panel

$4.99
Dayton PSC Blower (4C446)

$20.00
Yellow Jacket 46080 BRUTE R12/22/502 Manifold w/o Hoses

$9.99
RAMFAN UB20XX MAN HOLE VENTILATION BLOWER EXHAUST FAN

$157.38
FLUORO TECH FLUOROMIZER REFRIGERANT RECOVERY~BEST OFFER

$499.99
NOVAR HVAC CONTROLS IOM/2 CONTROLLER IN/OUTPUT MODULE

$125.00
Flex - Tube Man-o-meter

$30.00
Marini Transformer Padova Italy - 100VA VDE 0550 230V

$59.95
NOVAR EXECUTIVE CONTROLLER EC-4040 ELECTRICAL MODULE

$175.00
WHOLE HOUSE FAN - 48" - 1/2 Hp - 115V - 13,800 CFM

$573.00
R407C REFRIGERANT NEW NEVER OPEND 25 POUND

$50.00
Qmark MUH074 Electric Unit Heater & Bracket

$89.00
Dwyer Pressure Gauge

$40.00
Hoffman Design Aire Package Indoor A/C *NEW* 12,000 BTU

$1250.00
Side Wheel Manifold Gauge Set

$109.95
R407C REFRIGERANT NEW NEVER OPEND 25 POUND

$50.00
Lightstat TME Commercial Series setback Thermostat

$9.99
NOVAR EXECUTIVE CONTROLLER EP/2 ELECTRICAL HVAC MODULE

$175.00
Carel pCO1 DDC Temperature Controller

$25.00
Rotron Centrimax CHX33 Blower

$25.00
2 Stage Rotary Vane Deep Vacuum Pump 29.92"Hg 2CFM HVAC

$119.95
1 COMAIR ROTRON MD24K3 DC FAN 24 VDC / 13.2 W NIB

$16.99
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC

$169.95
Honeywell T874F1130 thermostat with Q674G1005 subbase

$10.00
Mini Tube Tubing Cutter Plumbing HVAC Tool 1/8-5/8" OD

$7.95
New 10" Round Krueger Steel Perforated Diffuser 6500

$43.66
yokogawa h10pm refrigerent leak detector

$100.00
12 Copeland Compressor mounting hardware Refrigeration

$18.99
R407C REFRIGERANT NEW NEVER OPEND 25 POUND

$75.00
Mini Tube Tubing Cutter Plumbing HVAC Tool 1/8-5/8" OD

$7.95
leak detector locator pipe locator water Free Shipping

$19.95
UEI DL269 Phoenix Digital Clamp On Meter HVAC NEW

$68.95
HONEYWELL 673731-001 3-WAY VALVE W/ ACTUATOR

$129.00
GEMTECH FREON GAGES WITH HOSES NEW

$29.99
HONEYWELL 2-POSITION DIRECT COUPLED ACTUATOR NEW

$9.99
Leak Detector Water Pipe locator air gas electronic

$120.00
Blazer Computemp Unit - 5 Ton, M-50AC, 460V, Heavy Duty

$5995.00
Gas Test Gauge 30 PSI Pressure Max. 3/4" FPT

$8.50
Honeywell 4 Zone Digital Energy Management System

$89.95
Little Giant Automatic Condensate Removal Pump New

$34.90
Yellow Jacket Test & Charging Manifold With hoses NEW

$15.00
New 8" Round Krueger Steel Louvered Diffuser Model 1400

$44.66
R134A Block Manifold Gauge Set 72" Hoses Quick Coupler

$39.95