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2. 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 ...

3. Condensing boiler - Wikipedia

   en.wikipedia.org/wiki/Condensing_boiler

   Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.

4. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   A steam heating system takes advantage of the high latent heat which is given off when steam condenses to liquid water. In a steam heating system, each room is equipped with a radiator which is connected to a source of low-pressure steam (a boiler). Steam entering the radiator condenses and gives up its latent heat, returning to liquid water.

5. Category:Residential heating appliances - Wikipedia

   en.wikipedia.org/wiki/Category:Residential...

   Pages in category "Residential heating appliances" ... out of 45 total. This list may not reflect recent changes. B. Boiler (water heating) ... High efficiency ...

6. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   A high-efficiency condensing combination boiler provides both space heating and water heating, and is an increasingly popular choice in UK houses, accounting for over half of all new domestic boilers installed. [7]

7. New Law Gives You $8,000 for Free To Make These 5 Home ... - AOL

   www.aol.com/finance/law-gives-8-000-free...

   The new “high-efficiency electric home rebate program” delivers homeowners in lower income households — earning less than 150% of an area’s median income — up to $14,000 cash back when ...