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2. Equivalence of direct radiation - Wikipedia

   en.wikipedia.org/wiki/Equivalence_of_direct...

   Equivalence of direct radiation (EDR) is a standardized comparison method for estimating the output ability of space-heating radiators and convectors. Measured in square feet, the reference standard for EDR is the mattress radiator [ 1 ] invented by Stephen J. Gold in the mid 19th century.

3. Radiator (heating) - Wikipedia

   en.wikipedia.org/wiki/Radiator_(heating)

   Hot-water baseboard-style radiator (top) which is covered (left) and opened (right), with inside view (bottom) showing the aluminium fins which are attached in series to the copper pipe A hot-water radiator consists of a sealed hollow metal container filled with hot water from a boiler or other heating device by gravity feed, a pump, or natural ...

4. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   The Summer Palace in St. Petersburg had an early system of hydrologic central heating. Early hot water systems were used in Ancient Rome for heating the Thermæ. [13] Another early hot water system was developed in Russia for central heating of the Summer Palace (1710–1714) of Peter the Great in Saint Petersburg. Slightly later, in 1716, came ...

5. Baseboard heating - Wikipedia

   en.wikipedia.org/?title=Baseboard_heating&...

   From Wikipedia, the free encyclopedia. Redirect page. Redirect to: Radiator (heating)#Hot-water baseboard; This page is a redirect.

6. Space heater - Wikipedia

   en.wikipedia.org/wiki/Space_heater

   Turning off the heater when the last adult leaves the room or goes to sleep and keeping children and pets three feet away from the heater. Placing heaters on a flat, hard, nonflammable surface. Avoiding the use of heaters near flammable materials such as paint or gasoline. Installing smoke alarms and carbon monoxide detectors nearby.

7. Energy factor - Wikipedia

   en.wikipedia.org/wiki/Energy_factor

   The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...