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2. Hypocaust - Wikipedia

   en.wikipedia.org/wiki/Hypocaust

   Hypocaust under the floor in a Roman villa in Vieux-la-Romaine, near Caen, France. A hypocaust (Latin: hypocaustum) is a system of central heating in a building that produces and circulates hot air below the floor of a room, and may also warm the walls with a series of pipes through which the hot air passes.

3. Building insulation - Wikipedia

   en.wikipedia.org/wiki/Building_insulation

   In cold conditions, the main aim is to reduce heat flow out of the building. The components of the building envelope—windows, doors, roofs, floors/foundations, walls, and air infiltration barriers—are all important sources of heat loss; [35] [36] in an otherwise well insulated home, windows will then become an important source of heat ...

4. Building envelope - Wikipedia

   en.wikipedia.org/wiki/Building_envelope

   Barrier walls are designed to allow water to be absorbed but not penetrate the wall, and include concrete and some masonry walls. Drainage walls allow water that leaks into the wall to drain out such as cavity walls. Drainage walls may also be ventilated to aid drying such as rainscreen and pressure equalization wall systems. Sealed-surface ...

5. Winter Heating: How To Choose the Best System for Your ... - AOL

   www.aol.com/winter-heating-choose-best-system...

   Heat pumps are an extremely energy efficient home heating method. The federal government is offering up to $3,200 for the installation of a heat pump system in your home, according to EnergyStar.gov.

6. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   A condensing boiler Hot water central heating unit, using wood as fuel. A central heating system provides warmth to a number of spaces within a building from one main source of heat. A central heating system has a furnace that converts fuel or electricity to heat through processes.

7. Thermal energy storage - Wikipedia

   en.wikipedia.org/wiki/Thermal_energy_storage

   A steam accumulator consists of an insulated steel pressure tank containing hot water and steam under pressure. As a heat storage device, it is used to mediate heat production by a variable or steady source from a variable demand for heat. Steam accumulators may take on a significance for energy storage in solar thermal energy projects.