Difference In Water Heater Btu

Because btus are measured per hour the 500 comes from one gallon of water that weighs 8 33 pounds.

Difference in water heater btu.

Recovery of gas fired water heaters is a function of the btu input and overall efficiency. A water heater is ranked by btu input but really means btus hr. A btu is the quantity of heat needed to raise one pound of water by one degree fahrenheit. Although they require fewer btu h to operate storage tank water heaters generally have higher operating costs because they heat and reheat water to a preset temperature regardless of a home s hot water demand.

The higher the btu input and efficiency the faster the recovery. My most likely sources for a replacing my 18 year old 40 gallon 40 000 btu water heater for my home are lowes and home depot. The difference in the case of a water heater is that you cannot control the air mixture. And s torage tank water heaters while less expensive up front don t last as long as tankless options.

Input ranges from about 32 000 on a 30 gallon unit to 88 000 on a 100 gallon tank. If a water heater is modified for high altitude. Current water heater is 40 gallon 40k btu state brand wh. Let s take a look at the formula to see what each piece of it means to help you understand it better.

Current wh is 19 years old and is starting to give some trouble pilot won t stay lit even after thermocouple replacement so i m getting a new water heater. Recovery of gas fired water heaters is a function of the btu input and overall efficiency. From 1050 btus the btu value at sea level to equal the normal average altitude of the area. Thus a 33 000 btu heater can heat 33 000.

Existing wh is set on the lower end of the temperature range just above the vacation setting to reduce the chance of a visitor getting. The simple formula for water is system delivered btu 500 x gpm x system water temperature change. It may be referred to simply as btu per day in specifications but both the numbers are the same measurement. The internal microprocessor provides more precise sensing and quicker heating response while the thermopile powered electronic gas valve runs the gas control without needing external power.

Lowes sells an a o. A common input is 34 000 btus on a 40 gallon tank and 36 000 btus on a 50 gallon tank. Input ranges from about 32 000 on a 30 gallon unit to 88 000 on a 100 gallon tank. The btu input can be found on the manufacture s id plate on the side of the water heater.

The btu multiplier in the formula is 500. Label does not give recovery time. Smith 40 gallon rated at 40 000 btu input but the rheem unit that home depot sells is rated at only 38 000 btu. A common input is 34 000 btus on a 40 gallon tank and 36 000 btus on a 50 gallon tank.

Gas stoves and grills. What does btu stand for in water heaters. The specific measurement used for solar hot water panels is btu per square foot per day.