Help sizing water heater and recovery rates
#1
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Help sizing water heater and recovery rates
My 18 year old AO smith is starting to leak. It is an 80 Gallon capacity. Since I haven't bought a HWH in a long time, I am surprised that there are few 80 Gallon ones out there. Most are 50 or 55. My question..if my 80 Gallon has a first hour rating of 81 and the 50 Gallon new model is also FHR 81, would that mean the 50 Gallon would be good replacement? Is the FHR really the key in picking a HWH? I'm sure they are much more efficient these days. I do have a family of 5, but, a few are in/out college wise. They take long showers though. lol I do have a garden tub, but, that isn't used that much. I'm just worried if I don't get a direct 80 gallon replacement, I might run out of hot water.
#3
80 gallons only come in stainless steel tanks and are lifetime units AFAIK.
What we do is install 50 gal du to cost.Install a mixing valve or tank booster as they call them and turn the temps up on the heaters. Then temper the water to 120f at the mixer. The 50 gal acts as a 70 gallon heater now..
If gas tankless may be an option.
What we do is install 50 gal du to cost.Install a mixing valve or tank booster as they call them and turn the temps up on the heaters. Then temper the water to 120f at the mixer. The 50 gal acts as a 70 gallon heater now..
If gas tankless may be an option.
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Sorry, I should have said Electric, not gas. From my research, It looks like I should either get a 50 or 55 Gallon with high FHR. Install a 2nd tank if necessary. Pretty annoying they stopped making 80 Gallon or I should say there are only a few out there. The Heat pump model ones are just too expensive too. One last question...I see a 50 Gallon model with two 5500 watt elements and a 55 Gallon model with 4500 Watt elements. Will that matter? My current 80 gallon has 4500. I do have a 30 amp breaker and I think wire is 10/2, so, it can run either. Any real difference in running 5500 vs 4500?
#5
Any real difference in running 5500 vs 4500?
Here's an 80 gallon electric model, 4500 watts, at the big box.
https://www.lowes.com/pd/American-Wa...ter/1000213693
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The Heat pump model ones are just too expensive too.