Do vent free gas appliances produce water?
Some people may be surprised to learn that vent-free appliances produce water. This occurs naturally by burning a combination of gas and air. The water is in the form of a vapor rather than a liquid. You can’t see it with your eyes. During cold months of the year, the relative humidity – the percentage of water vapor in the air – is low. You’ve probably experienced a scratchy throat caused by the dryness inside a home during the winter. Health studies have shown that increasing the indoor relative humidity results in a reduction of respiratory illnesses. AHAM, the trade association for the humidifier industry, recommends a 60% indoor relative humidity. Answer provided by the Vent-Free Products Alliance Brochure – 2002.
