Great Business Articles
Read business related articles here
Featured Articles
    Laptop Computers
Office Products
    CD-R, DVD-R, Blank Media
    Copiers & Copier Supplies
    Fax Machines & Supplies
    Microfilm & Microfiche
    Office Equipment
    Office Furniture
    Presentation, AV, Projectors
    Shredders
    Supplies & Small Equipment
    Trade Show Displays
    Other Office Products
    Wholesale Lots
Computers
    Acer
    Alienware
    Asus
    Dell
    Gateway
    HP, Compaq
    IBM, Lenovo
    Sony
    Whitebox, Custom Systems
Apple Computers & Components
    Apple Accessories
    Apple Components
    Apple Desktops
    Apple Laptops & Notebooks
    Apple Networking
    Apple Printers, Scanners & Ink
    Vintage Apple
    Wholesale Lots
    Other
Retail Equipment & Supplies
    Beauty & Salon Equipment
    Labeling & Tagging Supplies
    Mannequins & Dress Forms
    Racks & Fixtures
    Security & Surveillance
    Shopping Carts & Baskets
    Other
Plastics
    Auxiliary Process Equipment
    Injection, Blow Molding
    Molds, Dies
    Raw Materials & Scrap
    Other Items
Manufacturing & Metal Working
    Manufacturing Equipment
    Metalworking Equipment
    Metalworking Tooling, Supplies
    Process Equipment
    Metals & Alloys
    Semiconductor & PCB Equipment
    Textile & Apparel Equipment
    Welding
    Other
Printers
Printer Supplies & Accessories
    Cleaning, Repair Kits
    Feeders, Trays
    Ink Cartridges
    Ink Refill Kits
    Ink Ribbons
    Laser Drum Cartridges, Fusers
    Laser Toner
    Power Supplies
    Print Heads
    Printer Memory
    Printer Paper
    Sign Vinyl
    Other
Industrial Equipment, MRO
    Adhesives & Sealant
    Cleaning Equipment & Supplies
    Commercial Radios
    Compressors
    Fasteners & Hardware
    Forklifts & Other Lifts
    Forklift Parts & Accessories
    Government & Public Safety
    HVAC
    Hydraulics & Pneumatics
    Lighting & Lasers
    Industrial Automation, Control
    Manuals, Books
    Forklifts & Material Handling
    Painting Equipment & Supplies
    Motors, Transmissions
    Professional Tools & Hardware

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Search:  
9 SEALED JUGS R-22, 2 JUGS R-404A NIB FREON REFRIGERANT
$1574.99
DATALOGIC MX4000 Data Logic Reporting Device NEW?
$0.99
Ritchie Yellow Jacket GAS PRESSURE TEST KIT 78060 HVAC
$9.99
ROBINAIR
$800.00
Dayton Aluminum Fan Blade, Diameter 20 Inches 2C369
$14.99
Sporlan - Solenoid Type Valve - Type #XRN - NEW
$9.99
Alerton TX-SA-651 Controller
$4.99
Kit-Crank Case Heater Coil (BAYCCHT301)
$0.99
Honeywell Excel Modules 1)-T7770C1044 NIB +3 Total of 4
$10.00
Understanding TXV Refrigeration Systems
$22.95
Dildyne Refrigeration Vacuum Pump
$49.00
refrigerant R 404a
$99.99
DAYTON Fan 30 Inch Air Circulator 5PV05 230/460V 1/2 HP
$129.99
SLING PSYCHROMETER -GOOD AS NEW (BACHARACH) NO RESERVE!
$9.99
inficon tek-mate refigerant leak detector extra nice
$30.00
AUTOCLAVE OVEN 6 INCH BLOWER AND 3 PH MOTOR
$39.99
HONEYWELL RRD6 6 inch Retrofit Round Damper automatic
$24.99
Snap0n EEAC 312C Refrigerant Identifier W/ BIend ID
$89.00
NEW REFRIGERANT 22 VIRGING FACTORY SEALED
$149.00
HVAC freon recovery unit
$50.00
A.O. Smith Centrifugal Blower Assembly 9492 -NEW IN BOX
$9.99
TIF Multi-Refrigerant Leak Detector NIB Model TIF5050A
$1.25
Freon Refrigerant Leak Detector Pump HVAC R22 R134 R410
$61.00
New Bottle Refrigerant R-12 R12 AC HVAC Refrigeration
$280.01
1/4X5/16" Adapter Connector Coupler Ball Valve Set HVAC
$39.95
Motor Run Capacitor Mix Lots Qty 19
$0.99
GOLDLINE TWO STAGE TEMPERATURE CONTROL .P300 NEW NO/RES
$9.95
SMALL-Elec. Motors
$9.99
Blower, Dayton Electric
$30.00
NEW Copeland Compressor CR42K6PFV960
$99.99
NEW ITT Bell & Gossett Centrifugal Pump 3BC 370GPM 15HP
$399.00
Alerton TX-SA Controller
$9.99
Bear Blower from B-Air Blowers BP-1
$29.99
Siebe, Barber colman, Invensys damper actuator HVAC
$19.99
NASCAR Blue Blower Fan
$50.00
Asco RedHat Valve 8210G034 General Purpose 2-Way 1/2 NO
$0.99
Gripnail Machine
$400.00
New Johnson Controls AS-AHU102-0
$75.00
Sussman BASB20 20kw electric steam boiler
$0.99
Waste Oil Heater Furnace Plans Burns all waste oil
$54.99
NATIONAL REFRIGERATION PRODUCTS LV1 FREON RECOVERY SYS
$5.50
LIGHTLY USED RIDGID TUBING CUTTER # 20 * 5/8"TO 2 1/8"
$15.40
Ranco Water Cooler Control K-3001 "NEW IN BOX"
$0.99
Duro Dyne Pin Spotter
$400.00
HVAC Lennex Evap. Coil- 2 to 2 1/2 Ton with R-22 TXV
$75.00
HVAC- 2 Ton Trane AC Unit
$99.50
DAYTON GEN PURPOSE SOLENOID VALVE BODY 1A577 W/SOLENOID
$10.45
Dayton Auto Gas Pilot Relighter System 24/120 vac
$0.99
Asco RedHat Valve 8210P095 Shutoff 2-Way 3/4 NC New
$0.99
Power First 1/4 Hp Condensor Fan Motor NIB!!!!!!
$34.99
WALL ACCESS PANEL WITH INSULATION 12X12
$2.99
Liquid Line Filter Drier Alco ADK 052 1/4 " SAE flare
$0.99
NEW JOHNSON CONTROLS MODEL T-2100-61 THERMOMETER
$9.99
JOHNSON CONTROLS DX-9100 OPEN BOX
$250.00
Large 2 oz Compressor Oil/Dye Screw-in Injector AC/HVAC
$57.75
FIN COMB SET 6 Most Popular Sizes *COLOR CODED
$8.95
NIP Robinair 72" Hose Set
$7.16
A/C Radiator Fin Straightener Condenser Rake Comb Tool
$3.00
HVAC TXV Kit- 3 1/2 to 5 Ton R22 A/C Metering Device
$49.95
Snap-on Halogen Leak Detector Model No. ACT6550
$0.99
Automatic Halogen Gas Refrigerant Freon Leak Detector
$28.99
Motor Run Capacitor Mix Lots Qty 16
$16.50
Laser NON-CONTACT THERMOMETER infrared HVAC tool
$15.51
ERIE FAN COIL VALVE 1 INCH NORMALLY CLOSED NEW IN BOX
$9.95
ULTRA TRAC GAS DETECTION SYSTEM MODEL 2000
$99.99
BLC Roll-O-Mat Green 1" Thick 65' Long
$14.99
Rooftop Fan / Centrifugal Blower Model CPS - 3 HP #217a
$150.00
Motor Run Capacitor Mix 30+5, 35+5, & more. Lots Qty 15
$42.00
Premium Fiberglass Duct Knife w/Sheath New!
$6.00
asco solenoid valve
$5.99
Refrigeration Fundamentals For HVACR (E-BOOK) on CD
$19.95
USED 1/4 HP FURNACE BLOWER MOTOR
$45.00
3 FURNAS COIL CONTACTORS 45CG20AJB669R SERIES C
$5.99
Refrigerant Recovery Tank
$60.00
RANCO ECT111000 ELECTRONIC TEMPERATURE CONTROL
$36.00
FEBCO 765-1" BV Pressure Vacuum Breaker Assembly NEW
$20.50
Maneurop refrigeration compressor
$1100.00
CARRIER 07DB Condensing Unit 15 Ton 208/230 VAC
$499.99
2 tubes of silvaloy 15
$60.00
WHITE RODGERS DIGITAL THERMOSTAT **NEW**
$0.99
bell and gossett pressure reducing valve
$5.99
ERIE MFG. FAN COIL VALVE 1 INCH NPT 2 WIRE NEW IN BOX
$9.95
TIF 9450D Digital Micron Gauge
$20.51
HVAC Tool, Superheat/Subcooling Calculator, Software NR
$20.50
A/C Refrigerant Recovery Machine
$125.00
TIF RX-1A Refrigerant Leak Detector
$50.00
Beckette Oil Burner Motor 1/7 HP 3450 RPM Salvaged Work
$9.95
AUTOCLAVE OVEN PRESSURE SWITCHES
$39.99
HVAC Control Automated Logic R683
$5.50
Manifold Gauge 5'High Pressure Hose HVAC R134/R22/R404
$75.75
HVAC REFRIGERANT LEAK DETECTOR ( UEI RLD 10 ) a/c tool
$41.00
Air Brush/Flush Tool Kit Canister Hose Gun Assembly AC
$49.95
Model 14571Thermal Engineering Super VAK-CHECK II
$100.00
CARLIN UNIVERSAL IGNITOR KIT
$90.00
MASTER COOL MOBILE EVAPORATIVE COOLER MMB12
$250.00
(12) FREEZE 12 12oz. cans refrigerant r-12
$59.99
PAPCO #400 Flaring tool
$9.99