Heating, ventilation, and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics and heat transfer. "Refrigeration" is sometimes added to the field's abbreviation, as HVAC&R or HVACR or "ventilation" is dropped, as in HACR (as in the designation of HACR-rated circuit breakers). HVAC is an important part of residential structures such as single family homes, apartment buildings, hotels and senior living facilities, medium to large industrial and office buildings such as skyscrapers and hospitals, vehicles such as cars, trains, airplanes, ships and submarines, and in marine environments, where safe and healthy building conditions are regulated with respect to temperature and humidity, using fresh air from outdoors. Ventilating or ventilation (the "V" in HVAC) is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases. Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air. Ventilation often refers to the intentional delivery of the outside air to the building indoor environment.
Related Searches

If you like heater, try these related items.

Similar Topics

Customers looking for heater also searched for:

Sponsored Links
Banner 1
Graco E-20 with 6.0 kW Heaters - 259025
Graco E-20 with 6.0 kW Heaters - 259025
Price:
19,980.00 USD
Ends:
Dec 30, 09:00 pm
Heat Rail Tank Heater And Other Tanks Fast
Heat Rail Tank Heater And Other Tanks Fast
Price:
19,950.00 USD
Ends:
Dec 21, 12:26 pm
TLS-SAFETHERM700TR-480V - NTN - Induction Heater - Induction Heater
TLS-SAFETHERM700TR-480V - NTN - Induction Heater - Induction Heater
Price:
19,900.60 USD
Ends:
Dec 18, 09:40 pm
Fulton thermal transfer hot oil heater , CTR plug flow reactor Xylem (2012)
Fulton thermal transfer hot oil heater , CTR plug flow reactor Xylem (2012)
Price:
14,950.00 USD
Ends:
Dec 10, 06:16 pm
Graco E-10 Package, 2.0 kW Heater, 240V / 2 Cord 249571, 35' Hose, Fusion AP Gun
Graco E-10 Package, 2.0 kW Heater, 240V / 2 Cord 249571, 35' Hose, Fusion AP Gun
Price:
19,620.00 USD
Ends:
Dec 19, 01:37 pm
Westinghouse 20kW Industrial Induction Heater Radio Frequency Generator
Westinghouse 20kW Industrial Induction Heater Radio Frequency Generator
Price:
19,500.00 USD
Ends:
Dec 29, 05:16 pm
2001 BOBCAT T200 NEW TRACKS SKID STEER LOADER BRAND NEW TRACKS HUGE 73
2001 BOBCAT T200 NEW TRACKS SKID STEER LOADER BRAND NEW TRACKS HUGE 73" BUCKET!!
Price:
18,999.00 USD
Ends:
Dec 14, 02:03 am
Solar Pool Heater Radiant Hybrid 120' 6000W 20° Flow to 110° AC/DC Solar Powered
Solar Pool Heater Radiant Hybrid 120' 6000W 20° Flow to 110° AC/DC Solar Powered
Price:
18,999.00 USD
Ends:
Dec 15, 04:52 am
Waste Oil Heater - 200,000 BTU - 80 Gallon Tank- Wall Chimney Kit - 5,000 sq ft
Waste Oil Heater - 200,000 BTU - 80 Gallon Tank- Wall Chimney Kit - 5,000 sq ft
Price:
18,668.73 USD
Ends:
Dec 16, 07:08 am
Waste Oil Heater - 300,000 BTU - 80 Gallon Tank - ROOF Chimney Kit - 10,000 sqft
Waste Oil Heater - 300,000 BTU - 80 Gallon Tank - ROOF Chimney Kit - 10,000 sqft
Price:
18,626.20 USD
Ends:
Dec 18, 04:45 am
PORTABLE HEATER - 2,000,000 BTU - Ductable - LP & NG Fired - 12,500 CFM
PORTABLE HEATER - 2,000,000 BTU - Ductable - LP & NG Fired - 12,500 CFM
Price:
18,307.10 USD
Ends:
Dec 18, 05:35 am
Jackson TempStar High Hood Dishwasher w/ Exterior Gas Booster Heater
Jackson TempStar High Hood Dishwasher w/ Exterior Gas Booster Heater
Price:
18,290.59 USD
Ends:
Jan 02, 06:30 pm
Waste Oil Heater - 200,000 BTU - 80 Gallon Tank - ROOF Chimney Kit - 5,000 sq ft
Waste Oil Heater - 200,000 BTU - 80 Gallon Tank - ROOF Chimney Kit - 5,000 sq ft
Price:
18,092.11 USD
Ends:
Dec 18, 04:21 am
2012 ALLMAND HEATER MH1000 HOURS-3,917
2012 ALLMAND HEATER MH1000 HOURS-3,917
Price:
18,000.00 USD
Ends:
Dec 20, 06:24 pm
Cynosure Sculpsure Heater upgraded  with Submental FDA Approve
Cynosure Sculpsure Heater upgraded with Submental FDA Approve
Price:
18,000.00 USD
Ends:
Dec 27, 06:13 am
2014 Wacker Neuson HI 900 DGM Towable Indirect Fired Diesel Air Heater Used
2014 Wacker Neuson HI 900 DGM Towable Indirect Fired Diesel Air Heater Used
Price:
17,900.00 USD
Ends:
Jan 04, 01:38 pm
 New 1969 Camaro Steel Body No Heater,Firewall,Quarter Panels,Decklid,Doors
New 1969 Camaro Steel Body No Heater,Firewall,Quarter Panels,Decklid,Doors
Price:
16,325.00 USD
Ends:
Jan 03, 03:36 pm
McElroy 412  4 to 12 inch Pipe Fusion Machine With Heater Facer Works Fine
McElroy 412 4 to 12 inch Pipe Fusion Machine With Heater Facer Works Fine
Price:
16,999.99 USD
Ends:
Dec 07, 09:35 pm
AMAT Applied Materials 0010-24357 E-Chuck Heater Assembly Refurbished
AMAT Applied Materials 0010-24357 E-Chuck Heater Assembly Refurbished
Price:
17,502.10 USD
Ends:
Dec 27, 10:37 pm
3M87-058595-11 / STAGE HEATER ASSY 300MM,(ELPR NS)/TOKYO ELCTRON LIMITED TEL
3M87-058595-11 / STAGE HEATER ASSY 300MM,(ELPR NS)/TOKYO ELCTRON LIMITED TEL
Price:
17,500.97 USD
Ends:
Dec 31, 04:33 pm
BANNER 2