Articles About Computers
Read all about computers with these informative articles
Featured Articles
    What is a Computer
Computers
    Acer
    Alienware
    Asus
    Dell
    Gateway
    HP, Compaq
    IBM, Lenovo
    Sony
    Whitebox, Custom Systems
Retail Equipment & Supplies
    Beauty & Salon Equipment
    Labeling & Tagging Supplies
    Mannequins & Dress Forms
    Racks & Fixtures
    Security & Surveillance
    Shopping Carts & Baskets
    Other
Apple Computers & Components
    Apple Accessories
    Apple Components
    Apple Desktops
    Apple Laptops & Notebooks
    Apple Networking
    Apple Printers, Scanners & Ink
    Vintage Apple
    Wholesale Lots
    Other
Plastics
    Auxiliary Process Equipment
    Injection, Blow Molding
    Molds, Dies
    Raw Materials & Scrap
    Other Items
Manufacturing & Metalworking
    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
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
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
    Pumps & Plumbing
    Pumps
    Safety & Security
    Wholesale Lots
    Other
Construction
    Building Materials, Supplies
    Buildings, Modular & Pre-Fab
    Construction Equipment
    Mining Equipment

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 27 28 29 30 31 32 33 34 35 36

Search:  
Spotcool 30HU Portable Air Conditioner
$999.00
PROMAX RG5410A Refrigerant Recovery Machine
$227.50
Bell & Gosset Series 100 Circulator Pump
$10.00
Transformer Square D industrial control 220/440 230/480
$20.00
A/C VACUUM PUMP R134A & R12 CONNECTORS AIR CONDITIONER
$19.89
BACKDRAFT DAMPER 6 inch inline fan exhaust hvac
$16.00
CATCH ALL FILTER DRIER SPORLAN C-083 3/8 SAE FLARE 3QTY
$69.99
APPION G5 TWIN REFRIGERANT RECOVERY SYSTEM - BRAND NEW
$500.00
ignitor module
$89.99
BACKDRAFT DAMPER 10 inch inline fan exhaust havc
$25.00
HONEYWELL PA404A 1033 PRESSURETROL CONTROLLER NEW
$22.00
Ranco commercial temperature control 010-1419,-35F-15F
$10.70
Dwyer Manometer L@@K
$16.28
Honeywell Super VS8194E 1304 Combo Gas Control Heating
$0.99
Replace Sensor Halogen Refrigerant Freon Leak Detector
$24.99
RobertShaw 24 volt Electronic Ignition Tester HVAC Tool
$19.99
Annie A-2 Hermetic Analyzer Air Condition Refrigeration
$24.95
York Parts Lot TXV Sensors
$0.99
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe
$2.95
HONEYWELL REMOTE RESET MODULE S7820A 1007 USED
$5.00
New Sporlan Lot of 4 Catch All Filter Drier C-164-S
$14.50
Echelon 50020 LONWORKS® Lot of 20 NIB
$10.00
Mastercool 3 CFM High performance Vacuum Pump Brand New
$96.99
( NEW ) 3/4" 8210G095 Asco 2-Way Solenoid Valve
$20.00
White Rogers 24A01G-3 Electric Heat Relay
$0.99
Mastercool Accu-Charge Programmable Refrigerant Scale
$138.98
robertshaw gas valve 7200 7200er 7A7-A1B-001
$5.00
New Sporlan Lot of 4 Catch All Filter Drier C-083-S
$15.50
Honeywell Super Tradeline R4243 B 1038 Contactor
$10.00
TACO LOW WATER CUTOFF AUTO RESET 120 VAC LNA1203S-1 NIB
$34.99
Yellow Jacket 69080 Digital LCD Vacuum Guage NEW!!!
$76.00
Bronze 1 1/2 inch angle steam radiator valve
$20.00
Taco 110 Circulator Motor & other Parts
$19.95
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe
$2.95
( NEW ) 3/4" 8210G095 Asco 2-Way Solenoid Valve
$20.00
LEAK SEEKER LS790B Electronic Refrigerant Leak Detector
$29.28
EWC ND 8X12 MOTORIZED DAMPER 24VAC 50/60Hz
$39.95
Ranco household refrigerator control mod. K-401
$4.99
Siemens Actuator (New)
$14.95
New Bottle Refrigerant HP81 R-402B HVAC Refrigeration
$12.49
HONEYWELL FLAME RELAY RM7890A 1015 USED
$29.00
Transformers New 120/277 24 Volt 100 VA
$29.00
EXHAUST FAN Commercial - Direct Drive - 24" - 1/2 Hp
$422.00
6 X 12 CHARCOAL SCRUBBER ODOR REMOVER AIR FILTER
$66.45
S8610U 3009 Universal Replacement Ignition Module, nib
$25.49
NEW IN PACKAGE SUPCO DELAY ON BREAK TIMER #TD70
$3.99
Lot of 11 Koch Air Filters Microsafe ES 18x20x2 NEW!
$1.75
Taco Zone Valve 2 Way W/Heads - Gold Series
$285.00
Industrial Furnace 6MM BTU Horizontal Propane Fired
$177000.00
NEW CO1000 Carbon Monoxide Meter
$96.95
Beckett Oil Burner Ignition Electrode Kit
$12.50
26lb. R-11 Refrigerant Solevent AC R11 Refrigeration
$31.00
8 x 14 ACTIVATED CARBON FILTER ODOR SCRUBBER 240 CFM
$132.95
Inficon TEK-Mate Refrigerant Leak Detector
$99.99
White-Rodgers Gas Manifold 1/2x3/8 36C67-186
$49.99
78060 Yellow Jacket Gas Pressure Test Kit
$25.00
1-wholesale of electrical connectors plus
$27.00
DAYTON FURNACE FAN BLOWER MOTOR 4C448A RPM 1530 1/15HP
$51.00
( NEW ) 3/4" 8210G095 Asco 2-Way Solenoid Valve
$20.00
RSI PORT-OZONE 1 PORTABLE REFRIGERANT RECOVERY SYSTEM
$250.00
Fantech In Line Grow Light Exhaust Fan Duct Canister 5"
$31.00
Lot of 4 Solenoid Coils for Ranco reversing valves
$14.99
NEW JOHNSON CONTROLS TERMINAL UNIT VALVE, #VTM-TM019314
$9.99
Definite purpose contactor-2 pole-open type
$10.99
CG Tracer Gas detector Model 501
$10.00
15 HP ELECTRIC MOTOR GENERAL ELECTRIC
$120.00
HONEYWELL UV FLAME AMPLIFIER R7849A 1023 USED
$13.00
AFG BECKETT OIL BURNER
$59.87
NEW CASE OF COMPAC FOIL TAPE 2" BY 150' 24 ROLLS
$56.99
REFCO ECO-5 ULTIMATE VACUUM PUMP L@@K!!! NICE!!
$76.00
Solenoid Coil for Ranco reversing valves, L27-2000
$4.99
Dayton Exhaust Ventilator Model 3GY68G
$1290.00
HONEYWELL DYNAMIC UV FLAME AMPLIFIER R7886A 1001 USED
$13.00
Ranco Low ambient cut-out thermostat mod.A30-204
$4.99
NEW WHITE RODGERS REFRIGERATION TEMPERATURE CONTROL
$26.31
VENSTAR PROGRAMMABLE DIGITAL THERMOSTAT
$59.99
EMPIRE GAS SPACE HEATER WITH BLOWER
$169.99
( NEW ) 3/4" 8210G095 Asco 2-Way Solenoid Valve
$20.00
TIF8900 Combustible Gas Leak Detector
$14.99
1 lot of electrical tools
$30.00
HOFFMAN THERMOSTATIC STEAM TRAP 17C LOT OF 10 NEW
$202.50
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC
$169.95
Duo-Therm Inline Duct Blower
$34.00
Yellow Jacket 95760 RecoverXLT Recover XLT Recovery
$325.00
KoolTronics KLLC100 Lead-Lag Controller, New
$99.95
Liebert 3 ton Condensing Unit Model PFH037A-PL3
$890.00
Honeywell L6006C - 1018 Strap On Aquastat
$45.00
Bronze 1 inch angle Hydronic Radiator Valve
$12.00
( NEW ) 3/4" 8210G095 Asco 2-Way Solenoid Valve
$20.50
New Cylinder Refrigerant R-12 AC R12 HVAC Refrigeration
$112.50
HONEYWELL FLAME RELAY RM7823A 1016 USED
$23.00
( NEW ) 3/4" 8210G095 Asco 2-Way Solenoid Valve
$20.00
manitowoc control board
$59.99
Reznor Indoor Duct Furnace, Natural or Propane Gas
$335.00
Halogen Leak Detector mfg MAC tools
$10.99
Waste Oil Burner 120V
$650.00
3 Honeywell Y8610F5003 Intermittent Pilot Retrofit Kit
$51.59
Drying Blower Fan 3200 CFM 3/4 HP Dry Wet Carpet Floor
$233.33
NEW MARATHON 1/4hp 1075/900 RPM 208-230 VOLT MOTOR
$5.99
Bell & Gossett Series #100 pump-Used
$40.00