The byproduct, known as condensate, is carried away by a PVC drain that extends through the wall. Like standard efficiency gas furnaces, oil-burning furnaces also feature a combustion chamber ...

Changing from gas to climate-friendly electric appliances often involves expensive retrofits. A growing list of companies ...

Wall furnaces grew more popular by the 1950s because ... Once a year, if you have a gas burning unit, clean your venting (the exhaust pipe that leads outside). Make sure to wear a dust mask ...