Many older furnaces that were installed even as late as 1999 only operated at an AFUE of about 60%. What that means is that for every dollar's worth of gas you buy, you get about 65 cents worth of heat, and about 40 cents is wasted.
One VERY SIMPLE TEST is to turn your furnace on, wait about 15 minutes, and very carefully hold your hand near the flue pipe. Do not touch it, as some are over 500 degrees and would burn you before you could react. Your flue pipe is the pipe that
takes carbon dioxide, carbon monoxide, and a few other things you don't want in your home, outside. The results analysis is very simple. If this pipe is to hot to touch, then you are wasting valuable heat.
Please take time to read about how our ECM Fan Motors use much less electricity than standard furnace fans.
Yes, I know, you came to this page, because you are interested in being a responsible steward of this environment. So, how does a HIGH EFFICIENCY FURNACE do that? Very simply, it does the same job as a standard furnace, but it uses LESS GAS,
AND LESS ELECTRICITY. Most of the electricity we use around here is generated by burning fossil fuels. Therefore, we burn less fossil fuels because of our lower gas, and our lower electricity usage.
If you are interested in saving even more money, and lowering your CARBON FOOTPRINT even more, then look into our HEAT PUMPS or GEOTHERMAL.
A Secondary Heat Exchanger is an additional heat transfer device used to take most of the extra heat out of your flue gasses before allowing them to leave your home. Sometimes they look much like an air conditioning coil and sometimes much more like an additional standard type of heat exchanger. On a normal upflow furnace they are normally located just above the blower.
Weber Refrigeration Heating and Air Conditioning