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2. Forced-air gas - Wikipedia

   en.wikipedia.org/wiki/Forced-air_gas

   High-efficiency condensing furnaces condense the water vapor (one of the by-products of gas combustion) and extract the latent heat to pre-heat the incoming furnace airflow, using a second heat exchanger. [2] This increases the efficiency (energy delivered into the building vs. heating value of gas purchased) to over 90%.

3. Rheem Manufacturing Company - Wikipedia

   en.wikipedia.org/wiki/Rheem_Manufacturing_Company

   In North America, Rheem and Ruud both manufacture and sell a full line of heating and cooling products for residential and commercial applications, including up to 98.7% annual fuel use efficiency gas furnaces, oil-fired furnaces, up to 20 SEER air conditioners, heat pumps, thermostats, air handlers, package units, and indoor air quality ...

4. Annual fuel utilization efficiency - Wikipedia

   en.wikipedia.org/wiki/Annual_fuel_utilization...

   The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

5. Manitowoc Heating giving away free furnaces to those in need

   www.aol.com/manitowoc-heating-giving-away-free...

   Homeowners in need can be nominated to receive a new, high-efficiency Rheem furnace. Manitowoc Heating and its employees, along with vendors Design Air, Dynamic Air Quality Solutions and Hubbartt ...

6. Biden administration updates furnace efficiency standards for ...

   www.aol.com/lifestyle/biden-administration...

   The Energy Department issued its final efficiency rules for residential furnaces on Friday, which it projects will save Americans over $1.5 billion in heating expenses per year. The updated ...

7. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   EER is the Energy Efficiency Ratio based on a 35 °C (95 °F) outdoor temperature. To more accurately describe the performance of air conditioning equipment over a typical cooling season a modified version of the EER, the Seasonal Energy Efficiency Ratio (SEER), or in Europe the ESEER, is used. SEER ratings are based on seasonal temperature ...