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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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30 TON BRAND NEW HEAVY DUTY INDUSTRIAL COOLING TOWER

$2295.00
Dayton Blower, 265 CFM, 230 V, Shaded Pole Motor 4C869

$29.99
HONEYWELL LUMIDOR IMPACT PRO MULTI GAS MONITOR

$10.49
FURNAS COIL CONTACTOR 45CG20AJB669R SERIES B PN E- 011A

$0.99
HVAC FSK ALUMINUM FOIL DUCT TAPE 3IN X 50YD 4 ROLLS

$9.99
TIF RX-1A Leak Detector

$11.00
Honeywell L 4079B 1033 Pressuretrol--Brand New In Box

$39.99
CARRIER 30 TON CHILLER

$4999.99
SNAP ON ACT 6570 HALOGEN LEAK DETECTOR / MUST HAVE !!!

$36.50
Sporlan ADRHE-6-0/80 Discharge Bypass Valve, NEW

$24.95
ANDOVER CONTROLS SENSOR PLUS TEMPERATURE SENSOR TTS-SE

$160.00
HEATING SYSTEMS Burners Boilers * Fuels Gas Coal Oil CD

$0.01
INFICON D-TEK SELECT REFRIGERANT LEAK DETECTOR-NEW

$365.00
Lot of 11 3 Pole Power Outlets

$9.50
HONEYWELL L8148A 1009 AQUASTAT RELAY

$9.99
Johnson Controls 20 scfm filter element 5 NIB

$25.00
EWC Controls BMPlus2000 Ultra-Zone Control Panel

$12.50
EWC Controls Temperature Probe 3.25"

$0.99
PLATE HEAT EXCHANGER #31 PLATE MUELLER ACCU-THERM NRSV

$2500.00
NEW SOLARONICS 30,000btu INFRARED HEATER K30QSAN

$320.00
Honeywell P658A P. E. Relay NEW

$7.50
SSCOR VACUUM REGULATOR 2315 + BATTERY & CHARGER S-SCORT

$69.99
J/B Recal HVAC Refrigerant Charging Manifold 12 22 502

$6.50
Honeywell R841E Electric Heat Relay NEW

$9.50
Add-A-GAUGE Vacuum Pump Gauge with Adapters

$21.95
GOODMAN 5 TON GAS PACKAGE UNIT 115BTU /FREE SHIPPING

$3250.00
3 new KMP WorldSeries WAH 083 liquid line filter driers

$11.50
Honeywell T872F Thermostat NEW

$7.50
Honeywell Super Mod Motor Spring Return M955A1024

$199.00
ROBINAIR Thermistor Vacuum Gauge Model Number 14830A

$52.99
NEW TIF ZX-1 REFRIGERANT LEAK DETECTOR W/ CASE $1 NR

$115.00
Three New A/C Filter Dryers

$27.00
14 Contactors 8 Single/6 Double pole ALL 24 VOLT

$47.00
Heat Buster DBD4223 Industrial Fan

$299.00
Trane Compressor Overload Relay New in Box

$40.00
Honeywell Case & Cover Assembly for R450A NEW

$7.50
Inficon HLD-3000 leak detector

$400.00
Rheem Ruud 62-24044-71 Upgraded Flame Sensor Kit

$29.95
Vacco Stainless Hand Loader Regulator, 0-7000psig

$19.95
Furnace Ignitor for 41-409 Carrier LH33ZS004 Igniter

$15.95
Honeywell Diaphragm gas valve V48A 2185 120 v. 1- 1/2"

$49.00
SMITHS 18 INCH CLEAT BENDER

$10.50
BELL & GOSSETT BEARING ASSEMBLY 189134 FOR 100 SERIES

$50.00
Danfoss Solenoid Valve with Coil 018Z6301 *NIB

$32.20
TACO 1/8hp Circulator Pump

$100.00
Heater EdenPure Quartz Infrared Heater 1000 XL / Remote

$250.50
3 Quarts Robinair Premium Pump Oil

$6.00
Fieldpiece Magnetized Pocket Extension Claw PBS2

$10.99
Yellow Jacket Refrigerant Charge Cylinder

$121.00
TurboTorch (X-3B) Extreme Acetylene Kit (NR - NEW)

$100.00
BACKDRAFT DAMPER 6 inch inline fan exhaust hvac

$14.00
Robinair 15300 3 CFM Vacumaster Vacuum Pump HVAC NEW

$159.99
42" 14,726CFM 1/2HP FPC42-5 PORTABLE FAN ON WHEELS COOL

$129.00
Siemens 599 series 2"valve w/ 8" pneumatic actuator New

$199.00
EWC Controls Pressure Regulated Bypass Damper 10"diam

$0.99
TurboTorch (X-4B) Extreme Acetylene Kit (NR - NEW)

$140.00
STRAPMASTER ***MODEL A****HVAC IN EXCELLENT CONDITON!

$300.00
NEW TELEMECANIQUE CONTACTOR LA1 DN 22 120V 60HZ

$9.99
EWC Controls Zone Damper 8"x20"

$0.99
New Johnson Controls MS-VMA1410-0

$75.00
VENSTAR COMMERCIAL THERMOSTAT T2700 FOR A/C HVAC

$19.99
Dual Gauge Manifold Set 5'High Pressure Hoses HVAC R134

$75.75
Honeywell control

$5.50
AO Smith Commercial Natural Gas Boiler Model HW 670

$2490.00
EWC Controls Zone Damper 12"x8"

$5.50
DAMPER ACTUATOR KMC TITUS 8031 2 NEW IN BOX ACTUATORS

$35.00
25 TON BERG WATER CHILLER W/ ROOF TOP RADIATOR/ 300 HRS

$1075.00
New Halogen Refrigerant Freon Leak Detector HVAC/R Tool

$69.95
TIF 8800A Combustible Gas Leak Detector

$50.00
Blower Ventilator

$500.00
COPELAND, AIR CONDITION, CONDENSOR, REFRIGERATION UNIT

$450.00
TECUMSEH HVAC REFRIGERATION COMPRESOR AW5524E

$269.00
INFICON WHISPER ULTRASONIC LEAK DETECTOR-NEW

$195.00
19 Book CD * HVAC Air Conditioning | HEATING ManualsCD

$0.99
FURNAS COIL CONTACTOR 45CG20AJB669R SERIES C

$0.99
AMOT Controls Thermostat Element 1096x-160 NIB

$49.99
Honeywell P6588 Relay NEW

$7.50
Carrier Furnace Control Board HK42FZ012

$15.00
HUGE LOT OF 91 VIBRATION ELIMINATOR SPRING MOUNTS NEW

$299.99
EPA Refrigerant Exam Freon HVAC Guaranteed MiniTest 608

$6.99
One NEW Johnson Controls AS-UNT1144-0

$75.00
ARGO / TACO 1 ZONE HYDROAIR CONTROL! BRAND NEW! ARH-1

$50.00
New Model Rotary Vacuum Pump 29.9"Hg 3CFM AC/HVAC Light

$112.50
GOODMAN 5 TON HEAT PUMP PACKAGE UNIT /FREE SHIPPING

$3050.00
Carrier 20Ton Air Handler

$3500.00
Invensys/Siebe MN-FLO3T MicroNet VAV Controller

$0.01
condenser brushes

$0.99
LOT OF 7 NEW TITUS 300RS SUPPLY REGISTERS 18X36

$199.99
Inficon HLD-4000 Leak Detector 134a

$400.00
Marsh Airconditioning Charging Gauges R12

$19.99
FREON FR -12

$75.00
Heater EdenPure Quartz Infrared Heater 1000 XL / Remote

$263.00
Dwyer-Photohelic Pressure Switch/Gage- (-).25-0-.25"WC

$24.99
COPELAND, AIR CONDITION, CONDENSOR, REFRIGERATION UNIT

$300.00
Halogen/Freon Leak Detector HVAC Refrigerent Tool NEW

$69.95
Huge Swedish ThermoElectric Peltier w/ Heatsink & Fan!

$49.99
UEi Electronic Manometer EM100 in Box w/Instructions

$50.00
12 JOHNSON CONTROLS METASYS EXPANSION MODULES XP9105

$59.00
Parker Skinner Safety shut of Valve 73218BN4UN00N0D10B2

$31.99
Condensate Removal Pump

$25.00