Water Heater Btu Difference

A common input is 34 000 btus on a 40 gallon tank and 36 000 btus on a 50 gallon tank.

Water heater btu difference. Input ranges from about 32 000 on a 30 gallon unit to 88 000 on a 100 gallon tank. Let s take a look at the difference between the two. Electric water heaters range in. Tank water heaters typically hold 40 50 or 55 gallons or more.

From 1050 btus the btu value at sea level to equal the normal average altitude of the area. Lowes sells an a o. 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 water heater is ranked by btu input but really means btus hr.

Water heaters with an energy input higher than 75 000 btus are considered commercial water heaters so they aren t given an ef rating. However it gets a little more confusing here as the number can be given in two ways. Recovery of gas fired water heaters is a function of the btu input and overall efficiency. The btu input can be found on the manufacture s id plate on the side of the water heater.

Or 330 pounds by 100 degrees. Input ranges from about 32 000 on a 30 gallon unit to 88 000 on a 100 gallon tank. Recovery of gas fired water heaters is a function of the btu input and overall efficiency. The higher the btu input and efficiency the faster the recovery.

If a water heater is modified for high altitude get doc. The size you buy depends on the number of people living in your home and your peak water usage. Heaters also often use the btu measurement as a common specification. The difference in the case of a water heater is that you cannot control the air mixture.

Thus a 33 000 btu heater can heat 33 000 pounds of water by one degree in an hour. The higher the btu input and efficiency the faster the recovery. The family handyman suggests a 1 000 watt 3 410 btu heater for rooms under 100 square feet a 1 500 watt 5 115 btu heater for rooms measuring 100 to 150 square feet and a 2 500 watt 8 525 btu. The more btus the faster the unit will heat water.

I ve done some research and it appears there are some models of 40 gallon rheem water heaters that are rated for 40k but they apparently don t meet the stringent low nox standards in the bay area of california. A common input is 34 000 btus on a 40 gallon tank and 36 000 btus on a 50 gallon tank.