Mine Ventilation Services, Inc.

http://www.mvsengineering.com/

FIT Ventilation
FIT Ventilation - Your source for affordable portable ventilation.
http://www.fitventilation.com

Schaefer Ventilation
Ventilation and circulation fans for the greenhouse industry.
http://www.schaeferfan.com/Horticultural_Ventilation_C264.cfm

Vostermans Ventilation B.V.
Vostermans Companies is the parent company of a multinational enterprise, founded in 1952. Vostermans Ventilation B.V. Vostermans Alu Foundries B.V. Vostermans Tooling and Prototyping B.V.
http://www.vostermans.com

Smoking and Ventilation Standards
Americans for Nonsmokers' Rights (ANR) works to pass legislation at all levels of government to protect nonsmokers from secondhand smoke and protect youth from tobacco addiction. The American Nonsmokers' Rights Foundation (ANRF), ANR's educational arm, promotes smoking prevention and education about smoking, passive smoke, and the tobacco industry.
http://www.no-smoke.org/getthefacts.php?dp=d20

U.S. Products
Cooling, ventilation, dust proofing systems for control panel and drive motors; solutions for all your contamination, ventilation and cooling needs.
http://www.usprod.com/

Infography about Mine Ventilation
Sources recommended by a professor whose research specialty is mine ventilation.
http://www.infography.com/content/994105170943.html

Howden
Manufactures and supplies industrial fans, ventilation fans, heat exchangers, air preheaters, compressors, refits and maintenance service for air and gas handling.
http://www.howden.com/

Carey's Heating & Air Conditioning, Inc.
Specialized ventilation systems for military and police department indoor firing ranges nationally. HAVC installation and maintenance in the Greater Chicago area.
http://www.careyscentral.com

Air Conditioning and Ventilation
A group of companies working in the commercial and industrial sectors of the air conditioning and ventilating industries, offering sales of equipment, installation and full maintenance backup. We offer a free estimation service, which can include design if required. Our fully qualified engineers will come to site and quote a package, tailor made to your individual requirements.......
http://www.air-conditioning-ventilation.co.uk