Is 1.05 therms/day a lot for hot water heater to use?

Old 10-12-15, 11:29 AM
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Is 1.05 therms/day a lot for hot water heater to use?

I turn off all my gas appliances beside the hot water heater. Looks like it's pulling 1.1 therms a day. I believe it's a 40g tank 17 years old and it's on my to do list. Just wondering if that's the norm or should I upgrade my 20 year old furnace first.

I'll be replacing with a 50g tank if I do.
Old 10-12-15, 12:09 PM
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Many new Energy Star Rated water heaters will have a sticker to illustrate their average annual use. here is one fro HD that shows 242 Therms per year. if your number is correct, yours would be around 380 Therms per year.
Rheem Performance 40 Gal. Tall 6 Year 36,000 BTU Natural Gas Water Heater-XG40T06EC36U1 - The Home Depot

Other factors are involved, number of people, length of showers, low flow shower heads, and other hot water use. but this will give you an idea.

Old 10-12-15, 12:17 PM
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At what temperature do you have it set? The higher, the more therms to maintain that setting.

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