Other factors in determining the BTU size would be the room's purpose. A BTU is measured as the quantity of heat required to raise the temperature of 1 pound of water by 1°F. A gallon of water weighs 8.33 lbs. Temperature must be within the ranges 0-370 °C, 32-700 °F . Water Heating Time Calculator | How Long to Boil Water Specific heat: 1BTU/lb °F The complete calculation is then: You will notice in the formula being used that the specific heat and density are referenced to 60°F wa-ter. Calculator that tells you how long it takes to heat water from start to end temperature with a given heating power. Use our calculators to help choose the right products! * Free slots for orders with water heaters, boilers and other bulky items only Hot water radiant heating costs less to operate than electric systems because water conducts and holds heat very well, meaning there is less actual operating time. Water is often used to store thermal energy. BTU/HR to Boiler Horsepower Calculator. Water Heating Calculator for Time, Energy, and Power. Use this formula to calculate BTU cooling required: Formula BTU = Flow Rate In GPM (of water) x (Temperature Leaving Process - Temperature Entering Process) x 500.4 *Formula changes with fluids others than straight water. Water weighs 8.33 pounds per gallon so we can calculate that one gallon of water requires 8.33 BTU to raise the temperature 1ºF. Every gallon of water that evaporates from a pool takes with it 6000 BTU's of heat in the process, and a typical uncovered pool loses 1 to 1½ inches of water a week through evaporation. Click to see full answer Any item in blue font can be modified. Do a quick conversion: 1 Btus = 0.55555559065989 celsius heat unit using the online calculator for metric conversions. Terms. For example, a 25MJ heater will consume 1 litre per hour or a 91,502 BTU heater will consume 1 gallon of propane per hour. BTU Calculation The BTU (British Thermal Unit) is universally accepted as a unit of heat transfer measurement. How do I calculate BTU for floor heating? Is This Application Sanitary? How to Size a Pool Heater | AQUA Magazine How To Calculate Btu From Watts - arxiusarquitectura BTU Calculator 1. Input ranges from about 32,000 on a 30-gallon unit to 88,000 on a 100-gallon tank. If you have problems with the units, feel free to use our temperature conversion or weight conversion calculators. [Steam Property Calculator] => Specific Enthalpy = 1,198.0 btu/lbm; Steam Energy Flow = Specific Enthalpy * Mass Flow [ Steam Energy Flow = 117,297 = 1,198.0 btu/lbm * 92.8 klb/hr] Step 2: Determine Feedwater Properties and Mass Flow The feedwater flow rate can be calculated from steam mass flow and blowdown rate: Installing a radiant heat boiler costs from $6,000 to $9,000 and an extra $6 to $20 per square foot for the hydronic heating system in the house. Hot water radiant heating costs less to operate than electric systems because water conducts and holds heat very well, meaning there is less actual operating time. Add 25 BTU per cubic foot if your home has moderate to fair insulation. Flow Rate BTU Calculator - Carlson Heat Exchanger Usage: When BTU requirement is known (most applications): - enter the BTU requirement. This field is required. Calculate the kilowatt-hours (kWh) required to heat the water using the following formula: Pt = (4.2 × L × T ) ÷ 3600. Carlson Heat Exchanger Fluid to Fluid Sizing Calculator. The chart below is a great starting point for sizing your AC. * Free slots for orders with water heaters, boilers and other bulky items only 40,000 btu divided by 1,075 = 37.21. How To Calculate LPG Consumption Per Hour - Elgas This comparison does not reflect stand-by heat loss; or recovery. Propane Gas Tankless Natural Gas Volume of Hot Water Heated Temperature rise in degrees F BTUs required to heat water EF rating of the water heater purchased to heat water Cost per therm Fill in the blanks in the grey shaded areas. (e.g. Convert BTU to GJ - Energy Conversions GPM = BTU/hr8.33lb./gal x 60 min x ^t°F. Regarding this, how many BTUs do I need for radiant floor heating? This is the standard measurement of heat output needed to heat any structure, therefore can measure radiator power. 1 btu is the energy needed to heat 1 pound of water by 1° fahrenheit. Upvote. Q A or Q B = w • Cp • ∆T. Since watts are a measurement of the amount of electricity used, you have to add "per hour" into the formula when you convert from BTU units to watts. PROCEDURE. 1 KW = 3413 Btu = 4.1 Gals. This video shows you a system to calculate the BTUs require to heat up water. This is the typical heat capacity of water. In other words, the amount of heat that the system needs to remove from the space in summer, and the amount of heat that the system needs to bring to space in the winter season. Boiler BTU. It is an exact measurement that can be applied to most heating equipment. Once you punch in that information, the calculator will tell you the BTU/hr required. Other factors of the pool that may impact heating performance include design and configuration, volume/size, orientation, R-value of construction materials, plumbing length/materials, operating conditions and more. For a 20 by 40 foot pool, an inch of water amounts to 500 gallons—roughly, a heat loss of more than 30 therms every seven days. BTU Calculator for Weighed Water Test GPM A BTU is a measurement of heat - specifically, the heat needed to raise the temperature of one pound of water 1 degree Fahrenheit. Calculator. BTU . Electric Cost per Million BTUs at Various Costs per KWH Type Efficiency $ 0.040 $ 0.050 $ 0.060 $ 0.070 $ 0.080 $ 0.100 $ 0.120 $ 0.150 A 400k BTU heater will heat a pool twice as fast as a 200k BTU heater and burn gas twice as fast. Calculate the BTU requirement for your system in order to correctly size your boiler. Assuming you use the whole 100 L every hr then you use 220 lb of water per hr. 20,000 gallons x 8.3 lbs / gallon = 166,000 lbs of water that needs to be heated. Radiant Heat) High Temperature Heat (e.g. British Thermal Units or BTUs are a measurement of the energy required to raise the temperature of one pound of water by one degree. Use the swimming pool heater size calculator below. 1 btu is the energy needed to heat 1 pound of water by 1° fahrenheit.This btu calculator will determine what hearth product size is required with only a few steps and information such as square footage (sq ft). EER: The Energy Efficiency Ratio or EER is the ratio of the total cooling Btu/h to the total input This calculator tells you how much heating power is required to heat the water within a specified amount of time. US households require anywhere from 20,000 BTU to 300,000 BTU of heating output in the winter. The formula indicates a water temperature of 60°F. where . Steam Usage Calculator - How Much Steam Does It Take to Heat Water? This HVAC calculator is the closest estimate to the actual Manual J calculation done by HVAC pros. For sensible heating or cooling, the following equation holds true: Q = M * Cp * Delta T Where: Q = The amount of heat transferred to or from the fluid (BTU/hr) M = Mass flow rate of the fluid (lb/hr) Cp = Specific heat of the fluid (BTU/lb-°F) Heat Pump Calculator 2. Other water heating calculators are: time and energy. E = energy (kJ, Btu) c p = specific heat of water (kJ/kg o C, Btu/lb o F) (4.2 kJ/kg o C, 1 Btu/lb m o F for water). Remember to make your units of measurements consistent. Heating BTU Calculator The output specific heat is given as kJ/ (kmol*K), kJ/ (kg*K), kWh/ (kg*K), kcal/ (kg K), Btu (IT)/ (mol*°R) and Btu (IT)/ (lb m *°R) Note! It is approximately the energy needed to heat one pound of water by 1 degree fahrenheit. @ 100°F Rise 1 KW = 1,000 Watts Btu X 0.293 = Watts Determine % of hot water portion of total mixed water requirements M-C = 140-40 = 100 = 71.5% of mixture H-C 180-40 140 is hot water % of cold water in mixture is: 1 ∅ 3 ∅ (Balanced Circuits) Watts = Amps .577 X Watts = Amps Heating up a pool versus a pool/spa combination requires less BTU power. Calculations are rough estimates as to which size pool heater you may need. Multiply the cubic footage of a room by 25 BTUs to determine the rough estimate of BTU requirements for the room. The calculator supports Celcius/Centigrade, Fahrenheit, Watts (w), Kilowatts (Kw), Btuh, Joule, British termal unit (Btu), liter, gallon, kg, lb, cubic inch, cubic foot etc. . 1 Btu = 0.00029308 kW (kilowatt) 1 kW = 3412 Btu. Heating air with a steam coil or a hot water coil is an example of sensibly heating air. For example, if a furnace is rated at 100,000 btus and is 80% efficient, then the heat output will be 80,000 btus (100,000 ×.8). How to calculate the conversion of gallons of propane or natural gas to pounds or btus or to volume of gas 40,000 btu divided by 1,075 = 37.21. The calculators assume 100% efficiency and no loss of energy during the heating process. (e.g. One is roughly equal to 1,055 Joules. The amount of BTUs given a specific flow rate and delta T. Using the equation: BTU = 60 (minutes per hour) * 8.345404 (lbs per gallon of water) * Specific Heat * Specific Gravity * Delta T * Gallons Per Minute If you raise the T by 60 deg C then you raise it 140 F so i think youd use 30800 btu/hr. To find the system delivered Btu, multiply the Btu constant of 500 x the estimated Pump GPM x the System Temperature Change. 50 BTU/h * 0.2930711 [ (W) / (BTU/h) ] = 14.653555 W. To convert from W into units in the left column divide by the value in the right column or, multiply by the reciprocal, 1/x. 3.412 . To do so, we divide the BTU/hour by a constant of 33,475. The heat output or 'BTU' (British Thermal Unit) calculator is a great way to work out how much radiator power you need. The calculators on this page compute how long it takes to heat water, how much energy is consumed, and how much heating power is required. Heat load is in BTU/Hr or BTUH 'T = Temperature difference between the supply and return °F 500 is the constant for standard water properties at 60°F Density: 8.33 lbs. It is approximately the energy needed to heat one pound of water by 1 degree Fahrenheit. 3 british thermal units to cubic feet of natural gas = 0. More importantly, 0.29 BTUs per Watt. Dont know if this answers your question completely, but i think it should help. 1 BTU is the equivalent of 1,055 joules or .293 watts. The purpose of the 'Heating BTU Calculator' below is to pinpoint how many BTUs of heat your need as precisely as possible. Baseboard, Fan Coils, Radiators) Q2 What is the square footage of your home (the area to be heated)? Click to see full answer. Must be between 30 and 250. This calculator is approximate because it doesn't account for the many factors that impact heat loss in the swimming pool. There are 947,817.12 BTU in a gigajoule. If you want to raise the water temperature by 10 degrees, you would need 1,660,000 . 1 BTU is enough heat to raise the temperature of 1 pound of water by 1°F. The exact time needed to change the pool temperature will vary based on evaporation rate, convection losses, thermal radiation losses and conduction losses (explained more below). E = c p dt m (1). - Temp In, Temp Out, and GPM are shaded for Hot and Cold. Radiant Heat) High Temperature Heat (e.g. K). [Steam Property Calculator] => Specific Enthalpy = 1,250.0 btu/lbm; Steam Energy Flow = Specific Enthalpy * Mass Flow [ Steam Energy Flow = 56,183 = 1,250.0 btu/lbm * 42.6 klb/hr] Step 2: Determine Feedwater Properties and Mass Flow The feedwater flow rate can be calculated from steam mass flow and blowdown rate: Energy Conversion Calculator A BTU - or British Thermal Unit - is an approximation of the amount of energy required to heat 1lb (one pound) of water from 39°F to 40°F, and is roughly equal to 1.055 KJoules. According to your notes, the old boiler is 125,000 BTU/hr. The BTU/hour to Boiler Horsepower calculator is used to help size both steam and hot water boilers. The output specific heat is given as kJ/ (kmol*K), kJ/ (kg*K), kWh/ (kg*K), kcal/ (kg K), Btu (IT)/ (mol*°R) and Btu (IT)/ (lb m *°R) Note! 1 Btu = 1 055.05585 joules. heat rejection from air to water greatly improves the efficiency because the heat transfer is much better with water due to its increased heat capacity. Heat Pump Calculator 1. Accurately measure the water temperature entering and exiting your process. How to Size Hot Water Baseboard Heaters Measure the height of the room, the width of the room and the length of the room. The equation for heat transfer to a liquid is as follows: Q=W (T2-T1)Cp Q =Heat transfer per unit time (BTU/hr) BTU CONTENT OF FUELS Click calculate to get your. This example will heat up a virtual block of ice until it evaporates to steam. Usually, if you have a pool and spa combination, I recommend purchasing 30% higher BTU, for example going from a 300k to a 400k. The usual recommendation is an increase of 1 to 1 and a half degree per hour. Pt is the power used to heat the water, in kWh. BTU or 'British Thermal Unit' is a unit of heat. However, since 60°F water is too cool for a hot water heating system and too warm for a chilled water system, to calculate the correct flow rate, the formula should be based upon more appropriate water temperatures for each type of system, such as the . Example #1: A 25MJ Heater If you have a heater that consumes 25MJ/hr, to calculate the LPG consumption per hour, just divide 25 by the values in the MJ column of the consumption conversion chart. The BTU is defined as the quantity of heat required to raise the temperature of one pound of water 1°F. Cost Per Million BTU Calculator To compare cost per million BTUs, use chart below. In most water-based heat transfer applications, EG-based fluids offer excellent heat transfer efficiency and somewhat lower operating temperature ranges due to the lower viscosity of EG solutions compared to equal concentrations of PG. Since C p is measured in pounds, your mass of water heated should be measured in pounds as well. Upon returning to the office, you start to work on the quote. Please note that heat rise varies when dealing with different heaters. The higher the BTU input and efficiency, the faster the recovery. . The equation for heat transfer to a liquid is as follows: Q=W(T2-T1)Cp Q=Heat transfer per unit time (BTU/hr) W=Mass flow rate (lb/hr) A common input is 34,000 BTUs on a 40-gallon tank and 36,000 BTUs on a 50-gallon tank. What is a British Thermal Unit (BTU)? 1L water = 2.2 lb. In more moderate climates, multiply by 20 - 30. 1 BTU = 1,055 joules, 252 calories, 0.293 watt-hours, or the energy released by burning one match. One watt is equal to about 3.41 BTUs per hour. Convert 20000 BTU/hr to watts: P (W) = 20000 BTU/hr / 3.412141633 = 5861.42W These BTU calculations are based on a standard room with 8-foot ceilings, two windows and one door. per gal. L is the number of liters of water that is being heated and T is the difference in temperature from what you started with, listed in degrees Celsius. Btu is a unit of energy used to measure heating and cooling systems, as such, a heating or cooling system will have a Btu rating, e.g., 10,000 Btu. One BTU is the amount of heat energy required to raise one pound of water by 1ºF. Calculations are done automatically within the tables. How to calculate btu from watts. How thick is radiant floor heating? And in cold climates multiply the square foot number by 30 - 40. How to Calculate Furnace Size in BTUs What is a gigajoule (GJ)? Calculator App Code to add this calci to your website Formula: TT = 100 * ( (v * 8.33 * 453.59237) * ( ( (5 / 9) * (ET - 32)) - ( (5 / 9) * (ST - 32))) / (eg * 0.238845896628 * eff)) / 60 Where, TT = Time to Temperature v = Volume (Gallons) ET = End Temperature (Fahrenheit) ST = Start Temperature (Fahrenheit) eff = Efficiency eg = Energy Example If you prefer the value in British Thermal Units per hour, multiply by 3412 (1kW = 3412 BTU/h) To simply convert from any unit into W, for example, from 50 BTU/h, just multiply by the value in the right column in the table below. For example, if you're trying to heat 1000 square feet in a cold climate, 30,000 - 40,000 BTU's will add significant warm air to your home. A British Thermal Unit, or BTU is a unit of measurement of energy. British Thermal Units, or BTUs are a measurement of the energy required to raise the temperature of one pound of water by one degree. Pentair recommends consulting a pool professional for assistance with heater/heat pump sizing for specific locations and . The BTU is defined as the quantity of heat required to raise the temperature of one pound of water 1°F. The latent heat of fusion for changing Ice to water is a whopping 144 BTU per pound. Q A = Heat Required to Raise Temperature of Materials During Heat-Up (Wh) Q B = Heat Required to Raise Temperature of Materials Processed in Working Cycle (Wh) w = Weight of Material (lb) Check the chart for more details. Simplified, a single BTU is more or less equal to the amount of heat and/or energy produced by burning a single wooden match from end-to-end. This calculator will help determine which exchanger has enough heat transfer capacity for your system. Step 2 — Calculate kW: Cp = Specifi c heat of water = 1 Btu/lb/°F 2505 kW=lbs x 1 Btu/lb/°F x (115-70°F) 3412 Btu/kW x 1.2 SF kW= 39.6 kW Temperature Rise Vs. Water Flow1 Flow Through Oil Heating Oil Heating with Circulation Heaters — The procedure for calculating the requirements for "fl ow through" oil heating with circulation If the room has more windows, doors or higher ceilings, adjust the BTUs upward. 3 british thermal units to cubic feet of natural gas = 0. A British Thermal Unit is a unit of energy in the Imperial System. Only input whole numbers, do not use a comma or point. Write this number down, and keep it handy as you examine your options. If no heat dissipation is specified you can take the typical power consumption as heat dissipation. The BTU multiplier in the formula is 500. We often refer to the British Thermal Unit as a BTU, but the rating is actually the BTUs per hour, or BTU/h. The "water formula" says: Q (Energy) = 500 x f x DeltaT (in F) Q = rate of heat transfer (Btu/hr.) Example. A British Thermal Unit (BTU) is the measure of energy required to heat 1 pound of water 1 degree Fahrenheit. 19,620 btu/lbm) and multiply by the . A rough calculation tells you the home is about 1,800 square feet. The room's length, width, ceiling height, and insulation, as well as the lowest outside temperature, are all considered on the Total Home Supply calculator. Your instrument's Site Preparation Guide should specify the heat dissipation in kW. Number of square feet Calculate the number of cubic feet to heat. This btu calculator will determine what hearth product size is required with only a few steps and information such as square footage (sq ft). The math calculation is accurate for electricity. The calculator supports Celsius/Centigrade, Fahrenheit, Watts (w), Kilowatts (Kw), Btuh, Joule, British thermal unit (Btu), liter, gallon, kg, lb, cubic inch, cubic foot etc. Energy Required To Heat 1000 Gallons Of Water A Btu, or British thermal unit, is the amount of energy needed to raise one pound of water from 60°F to 61°F at sea level. The calculator below can be used to calculate the liquid water specific heat at constant volume or constant pressure and given temperatures. Evaluate the amount of BTUs needed to heat a space, taking into account several factors such as the insulation level and the desired temperature. BTU CALCULATION The BTU (British Thermal Unit) is universally accepted as a unit of heat transfer measurement. A btu is the energy it takes to raise 1 lb of water by 1 degree Fahrenheit. If the incoming water is 60°F and we want to raise it to 140°F, that is a 80°F rise. Therm : The therm is a non-SI unit of heat energy equal to 1000,000 British thermal units (BTU). Since it takes one Btu to heat one pound of water by a single degree, we now know that raising this entire 20,000-gallon pool by one degree will require 166,000 Btu of heat energy. Installing a radiant heat boiler costs from $6,000 to $9,000 and an extra $6 to $20 per square foot for the hydronic heating system in the house. 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. Btu stands for - British thermal unit - . Must be between 1 and 20000. One therm is equal to 1.055 056 × 108 joules. Just multiple the BTUs by 0.92 to find the number of Watts needed. There is a quick back of the envelope formula used for calculating the BTU/h values for heating water. Energy stored - or available - in hot water can be calculated. f= flow rate (gallons per minute or gpm) DeltaT = temperature change (degrees F) This page has a set of custom SupplyHouse.com calculators that will estimate the requirements for your projects and help you determine what products you will need. The symbol for British Thermal Unit is BTU or Btu. Width ( ft) Length ( ft) Height ( ft) Number . Because BTUs are measured per hour, the 500 comes from one gallon of water that weighs 8.33 pounds, times 60 minutes in one hour. This calculation translates the heat transfer input requirement to BHP. A BTU (British Thermal Unit) equals the energy needed to raise the temperature of one pound of water by one degree F. System Efficiency - Measure of the percentage of potential energy contained in a fuel source that actually gets delivered as heat within a home heating system (i.e., an 85% efficient system wastes 15% of its heating potential). Other water heating calculators are: power and energy. Baseboard, Fan Coils, Radiators) Q2 What is the square footage of your home (the area to be heated)? A British Thermal Unit (BTU) is a measurement of heat energy. . Must be between 10 and 300. This field is required. Electric water heaters typically have one 5,500-watt or two 4,500-watt elements. What is a BTU? Temperature must be within the ranges 0-370 °C, 32-700 °F . Boiler BTU Calculator - Boiler Sizing Calculator - Boiler Sizing - Boiler BTU Calculator . This HVAC Load Calculator estimates the size of your heating and cooling system in BTU's. The heat load estimate is based on your climate region, total square footage, number of rooms or zones you want, ceiling height, insulation type, number of windows and doors. How to convert BTU/hr to watts. In warmer climates, multiply this number by 10 - 15. 1 BTU is the energy needed to heat 1 pound of water by 1° Fahrenheit. P (W) = P (BTU/hr) × 0.29307107 = P (BTU/hr) / 3.412141633. The full name is British thermal unit. 1 watt is approximately 3.412 BTU per hour. 1BTU/hour is equal to 0.293 watt. Since all calculations are in watts, an additional conversion of 3.412 Btu = 1 Wh is introduced yielding: Equation 1. dt = temperature difference between the hot water and the surroundings (o C, o F))m = mass of water (kg, lb m) Boiler BTU Calculator - Boiler Sizing Calculator - Boiler Sizing - Boiler BTU Calculator . Subtract the supply water temperature from the return water temperature to find the system temperature change. How thick is radiant floor heating? 1 BTU/hr = 0.29307107 W. So the power P in watts (W) is equal to the power P in BTUs per hour (BTU/hr) times 0.29307107 and is equal to the power P in BTUs per hour (BTU/hr) divided by 3.412141633:. A BTU is approximately the energy required to heat 1lb of water from 39°F to 40°F. How to calculate btu from watts. You also notice the newer windows and doors. Btu. The heat output of radiators and towel warmers is often given in the form of BTUs, which allows homeowners to be sure that the products they are buying will supply enough heat. Air Conditioner BTU Chart. The calculator below can be used to calculate the liquid water specific heat at constant volume or constant pressure and given temperatures. To calculate the Heat Required, use this equation: Where … = mass of water heated = the heat capacity of water (1 BTU / lb ºF) = temperature difference. The British Thermal Unit, or BTU, is an energy unit. This being the case, Once our example of 5 pounds of snow has been raised to 32 degrees by the addition of 26 BTU per square foot, we will need another 750 BTU per square foot to actually melt the snow. (8.33 pounds X 60 minutes = 500) The second piece of the formula and sometimes the hardest to identify is flow rate in GPM, or the system gallons per minute. - enter two of the three shaded portions . 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That information, the old boiler is 125,000 BTU/hr 1 ) a 40-gallon tank and 36,000 on... On a 40-gallon tank and 36,000 BTUs on a 50-gallon tank 8.33 BTU to 300,000 BTU of heating output the... Most applications ): - enter the BTU input and efficiency, the Calculator will tell you the BTU/hr.... Footage of your home ( the area to be heated ) moderate to fair insulation old boiler is BTU/hr! This number down, and find the system temperature Change BTU per cubic foot if home! Size would be the room & # x27 ; is a Unit energy... Input and efficiency, the faster the recovery 108 joules btu to heat water calculator climates multiply the BTU the. Within the ranges 0-370 °C, 32-700 °F your instrument & # x27 ; Thermal... Comma or point multiple the BTUs per hour, or the energy needed to heat 1 pound of 1°F! Be calculated recommendation is an exact measurement that can be calculated = 1,055 joules or.293 Watts room. ) number energy during the btu to heat water calculator process as to which size pool heater you may need BTU calculations rough! So we can calculate that one gallon of water per hr your AC joules or.293 Watts pound!: - enter the BTU input and efficiency, the faster the recovery units! Pound of water per hr requirement to BHP units to cubic feet of by. This Calculator will tell you the BTU/hr required water weighs 8.33 pounds per gallon so we can calculate that gallon! Thermal Unit as a BTU, multiply the lineal feet of radiation by 590 BTU/hr, find... Will tell you the BTU/hr required Temp Out, and keep it handy you... The equivalent of 1,055 joules or.293 Watts water heating calculators are: power energy! Gas in United Kingdom, but i think it should help heat Exchanger Fluid to Fluid sizing Calculator w Cp. As heat dissipation in kW foot if your home ( the area to be heated?. Temperature by 10 degrees, you start to work on the quote and in cold climates multiply square... This is the energy needed to heat 40-gallon tank and 36,000 BTUs on a 50-gallon tank & x27. Recommends consulting a pool versus a pool/spa combination requires less BTU power degrees, you would 1,660,000. Btu = 1,055 joules, 252 calories, 0.293 watt-hours, or.... Vs. temperature < /a > K ) ) = p ( w ) = p ( BTU/hr ) × =! An exact measurement that can be calculated room with 8-foot ceilings, the. 5,500-Watt or two 4,500-watt elements 3412 BTU 32-700 °F the amount of energy. Varies when dealing with different heaters: - enter the BTU is heat.
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