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2. Forced-air gas - Wikipedia

   en.wikipedia.org/wiki/Forced-air_gas

   The natural gas is fed to buildings from a main gas line. The duct work supplying the hot air (and sometimes cool air if an AC unit is tied into the system) may be insulated. A thermostat starts and stops the furnace to regulate temperature. Large homes or commercial buildings may have multiple thermostats and heating zones, controlled by ...

3. Forced-air - Wikipedia

   en.wikipedia.org/wiki/Forced-air

   A forced-air central heating system is one which uses air as its heat transfer medium. These systems rely on ductwork, vents, and plenums as means of air distribution, separate from the actual heating and air conditioning systems. The return plenum carries the air from several large return grills (vents) to a central air handler for re-heating ...

4. Hart & Cooley - Wikipedia

   en.wikipedia.org/wiki/Hart_&_Cooley

   In the second half of the century, Hart & Cooley expanded into many other products lines, including Type-B vent for gas-fired appliances, all-fuel chimney systems and flexible air ducting. Hart & Cooley Inc. celebrated its centennial anniversary in June 2001, and 6 years later moved its headquarters to Grand Rapids, MI, 30 miles northeast of ...

5. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as compared to a mid-efficiency forced-air or forced-draft furnace, is the ...

6. 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 ...

7. Plenum space - Wikipedia

   en.wikipedia.org/wiki/Plenum_space

   In the event of a fire, this can expose non-fire resistant building materials to heat. A plenum space is a part of a building that can facilitate air circulation for heating and air conditioning systems, by providing pathways for either heated/conditioned or return airflows, usually at greater than atmospheric pressure.

8. New efficiency standards for home furnaces unveiled [Video] - AOL

   www.aol.com/news/biden-administration-unveils...

   (Canada has already required condensing furnaces for residential heating for over a decade.) Close-up of flames on a natural gas furnace burner in the HVAC system of a suburban home in San Ramon ...

9. Phase-out of fossil fuel boilers - Wikipedia

   en.wikipedia.org/wiki/Phase-out_of_fossil_fuel...

   Ban on new oil boilers and gas connections in Flanders in all new buildings. 2025 Only in Flanders California Ban on new gas furnaces and water heaters. 2030 California Air Resources Board writing rules to implement. [6] Denmark Convert all 400,000 gas boilers to district heating and heat pumps 2029 Use obligation and duty for renewable energy ...