Are vent free gas product safety in terms of indoor air quality?
A. Yes. This has been verified by research concert by the Gas Research Institute and conducted by American Gas Association Research. This research shows that when the product is properly sized and installed, vent free gas heating products meet applicable emissions requirements, even when used over and extended period of time, among sensitive populations, and with oversized units. In fact, using oversized appliances actually results in lower average emissions because the unit operates for a shorter period of time. The researchers concluded that under “worst-case” conditions, vent free gas heating products perform well within nationally recognized guidelines for indoor air quality. For instance: when tested for nitrogen dioxide, the vent free gas products tested by AGAR produced less than one-half of the ppm level of N02 recommended by Health occupational safety and Health Administration for 1 hour. Also, when tested for carbon monoxide, vent free gas products emitted less than 20 percen
