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2. Annual fuel utilization efficiency - Wikipedia

   en.wikipedia.org/wiki/Annual_fuel_utilization...

   But for an instantaneous fuel consumption rate, the thermal efficiency may be better. The theoretical limit for a conventional furnace's instantaneous efficiency is 100%, whereas a heat pump used for building heating may exceed 100%. For example, a COP of 1.5 is equivalent to 150%. Heat pumps are readily available for electric and gas sources. [3]

3. What's The Difference Between A Heat Pump And A Furnace ...

   www.aol.com/whats-difference-between-heat-pump...

   Heat pumps run on electricity and furnaces run on fossil fuels, natural gas, propane, or oil. ... In colder climates, 95% efficient gas furnaces fare better than ENERGY STAR® heat pumps. And, due ...

4. Propane - Wikipedia

   en.wikipedia.org/wiki/Propane

   Propane has lower volumetric energy density than gasoline or coal, but has higher gravimetric energy density than them and burns more cleanly. [ 6 ] Propane gas has become a popular choice for barbecues and portable stoves because its low −42 °C boiling point makes it vaporise inside pressurised liquid containers (it exists in two phases ...

5. Gas heater - Wikipedia

   en.wikipedia.org/wiki/Gas_heater

   A gas heater is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane, or butane. Indoor household gas heaters can be broadly categorized in one of two ways: flued or non-flued, or vented and unvented .

6. 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 ...

7. Shopping for a furnace? Don't spend thousands more than ... - AOL

   www.aol.com/news/2008-06-26-shopping-for-a...

   After 17 years, our furnace is wearing out. Earlier this week, the blower finally seized up, so we decided to bite the bullet and shop for a new furnace. Our house requires an 80-90,000 BTU furnace.

8. Liquefied petroleum gas - Wikipedia

   en.wikipedia.org/wiki/Liquefied_petroleum_gas

   2 per unit of energy than does coal or oil, but more than natural gas. It emits 81% of the CO 2 per kWh produced by oil, 70% of that of coal, and less than 50% of that emitted by coal-generated electricity distributed via the grid. [41] Being a mix of propane and butane, LPG emits less carbon per joule than butane but more carbon per joule than ...

9. Gasoline - Wikipedia

   en.wikipedia.org/wiki/Gasoline

   This lower density is a property of the lower molecular weight of propane (LPG's chief component) compared to gasoline's blend of various hydrocarbon compounds with heavier molecular weights than propane. Conversely, LPG's energy content by weight is higher than gasoline's due to a higher hydrogen-to-carbon ratio.