LINKS:

Products:

• www.aprilaire.com
• www.waterfurnace.com (radiant floor systems)
• www.gerberonline.com
• www.bio-clean.com
• www.arcan.com (“Septic Scrub”)
• www.anaheimmfg.com/ (Whirl-away garbage disposers)

Organizations:

• www.igshpa.okstate.edu (International Ground Source Heat Pump Association)
• www.americanstandardair.com (air conditioners and gas furnaces)

Information:

• www.geoexchange.com
• www.ppfahome.org/pex/faqpex.html