Starting Sept. 1, 2012, all residential boilers must be manufactured to meet new minimum federal efficiency standards. Residential gas hot water boilers must meet 82 percent AFUE; gas steam boilers, ...
The Series PSC is a sealed-combustion, residential, gas-fired boiler for installations where the chimney is inadequate or unavailable, the manu-facturer says. The direct vent, hot water boiler is ...
ELECTRICITY CAN be made from the sun, the wind or the atom rather than by burning fossil fuels. Cars, buses and perhaps even lorries can be powered by batteries rather than petrol or diesel. But other ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback