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2. Furnace (central heating) - Wikipedia

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

   The fourth category of furnace is the high-efficiency condensing gas furnace. 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 ...

3. Heating, ventilation, and air conditioning - Wikipedia

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

   In the United States, federal licensure is generally handled by EPA certified (for installation and service of HVAC devices). Many U.S. states have licensing for boiler operation. Some of these are listed as follows: Arkansas [46] Georgia [47] Michigan [48] Minnesota [49] Montana [50] New Jersey [51] North Dakota [52] Ohio [53] Oklahoma [54 ...

4. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.

5. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Forced-air - Wikipedia

   en.wikipedia.org/wiki/Forced-air

   Requires less energy than electric resistance heating and possibly more efficient than fossil fuel fired furnaces (gas/oil/coal). Air source types may not be suitable for cold climates unless used with backup (secondary) source of heat. Newer models may still provide heat when coping with temperatures below 0 °C (32 °F).

7. Smart Columbus - Wikipedia

   en.wikipedia.org/wiki/Smart_Columbus

   Smart Columbus is an innovation organization in Columbus, Ohio. The initiative is led by the City of Columbus and the Columbus Partnership, a nonprofit organization for development in Central Ohio. Smart Columbus was founded in 2016 to utilize $50 million in grant awards toward technology, transportation, and environmental developments. [1]