I just need a small one for a guest bedroom. First, how many degrees do you need to warm your home, or rather, how cold is it outside. 1 BTU = 1,055 joules, 252 calories, 0.293 watt-hour or the energy released by burning one match. A beach bungalow built in the 1800s with no renovations should probably be classified as poor. 1 BTU is the energy needed to heat 1 pound of water by 1° Fahrenheit. Is your space well insulated? Finally, we also need to consider the location of the room … Darker surface absorbs more radiant energy than a lighter one. BTU as a unit of measurement is more useful than physical quantity because of fuel's intrinsic value as an energy source. For instance, adjustable gas valves and remote controls for fireplaces, inserts and stoves. There are several factors which can affect this, such as room dimensions, heating levels and types of window, which are all covered in our radiator BTU calculator. The middle part of the country - Zone 3 and 4 - require between 40-45 BTU per square foot, while the northern areas of Zone 5 need up to 60 BTUs per square foot. Size of air conditioning condenser. ENERGY STAR certified room air conditioners come with better materials and clearer instructions to improve sealing and insulation around the unit, so costly and uncomfortable air leaks are minimized. This allows many different commodities with intrinsic energy properties to be compared and contrasted; for instance, one of the most popular is natural gas to oil. These controls easily vary the amount of natural or LP gas that’s burned, or the energy in BTU’s delivered to the room. Step 1 Find the Area of the Room,. This may shorten the lifespan of the air conditioner. It is possible to try and place shady trees around the condenser, but keep in mind that condensers also require good surrounding airflow for best efficiency. The required rating of a unit can be calculated on the basis of several factors, the most important of which is the area (size of the room) it must keep at a comfortable temperature. We’ve rated and measured our units against a number of different room and/or home conditions that can effect the cooling power required. The best way to get an accurate calculation is to enlist the services of a plumber. It could mean reducing humidity levels. It is approximately the energy needed to heat one pound of water by 1 degree Fahrenheit. BTU will usually apply to rooms with 8 The color of roofs can affect BTU usage. How many yards of carpet do I need for a 12x12 room? i have the same size room and 75°F for Boston winter, 45°F for Atlanta winter. If the house or room is very sunny, however, add 10 percent more BTUs. Knowing the amount of energy, measured in BTU’s, is necessary to keep your home comfortable in the both heating and cooling seasons. 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