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  2. Annual fuel utilization efficiency - Wikipedia

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

    The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

  3. Furnace (central heating) - Wikipedia

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

    These furnaces were still big and bulky compared to modern furnaces, and had heavy-steel exteriors with bolt-on removable panels. Energy efficiency would range anywhere from just over 50% to upward of 65% AFUE. This style furnace still used large, masonry or brick chimneys for flues and was eventually designed to accommodate air-conditioning ...

  4. The Best Portable Heaters Will Warm Any Room of the House - AOL

    www.aol.com/warm-room-house-best-portable...

    Plus, it comes backed by over 45,000 five-star ratings from customers who love their heater. This is an excellent investment for heating your home as it comes in at just under $33.

  5. This Is the Best Propane Campfire for Wood-Level Warmth - AOL

    www.aol.com/best-propane-campfire-wood-level...

    For premium support please call: 800-290-4726 more ways to reach us

  6. Thermal efficiency - Wikipedia

    en.wikipedia.org/wiki/Thermal_efficiency

    An electric resistance heater has a thermal efficiency close to 100%. [8] When comparing heating units, such as a highly efficient electric resistance heater to an 80% efficient natural gas-fuelled furnace, an economic analysis is needed to determine the most cost-effective choice.

  7. The 10 Best Propane Grills for Outdoor Cooking, According to ...

    www.aol.com/news/10-best-propane-grills...

    Shop top-rated models from Weber, Blackstone, and other customer-loved brands. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways ...

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