Big Ass Fans is a manufacturer of industrial ventilation including large high volume or low speed (HVLS) fans. Recent innovations include the Powerfoil, has revolutionized the air movement industry.

http://www.bigassfans.com/appl_wareho... [ Industrial Ventilation ]

    Nationwide providers of heating, air conditioning, indoor air quality, sewer, plumbing and drain cleaning and other residential services. Features regular special offers and a searchable directory of service providers.

http://www.ars.com/ [ Residential Services ]

    Pennsylvania based distributor of name brand replacement HVAC parts for heating, ventilation, and air-conditioning systems. Includes product listing, online quotation request, and technical support contacts.

http://www.hvacplus.com/ [ HVAC Parts ]

    Residential and commercial, Maryland air duct cleaning contractor for homes or businesses. HVAC cleaning service include dryer vent cleaning with national air duct cleaners association certification.

http://www.tdducts.com/ [ Maryland Air Duct Cleaning ]