Hot Tub Forum
Original => Hot Tub Forum => Topic started by: Bosmani on November 28, 2005, 07:26:38 pm
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Seen this asked on another forum. Keep tub at desired heat 24/7 or drop 7-8 degrees untill you wish to use it? Personally I keep mine up there but there were some interesting views on this. anyone any thing to add?
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The answer is setting the temperature down is more energy effiecient and hence cheaper then keeping the tub a constant temperature. This is actually a first year physics problem routinely given to explain "work". It's a fact, there really isn't any question about it. This is the reason home thermostats are now programable, you save lots of money over time by turning down the heat while your not there, in bed, etc. Of course having to go out to the tub an hour ahead of jumping in doesn't seem worth while to me. We're at a constant 102!
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Same here. We keep the temperature constant, I don't want to wait the time to heat the spa up to temp.
But doing so would save money.
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Seen this asked on another forum. Keep tub at desired heat 24/7 or drop 7-8 degrees untill you wish to use it? Personally I keep mine up there but there were some interesting views on this. anyone any thing to add?
If I told you it would save you 20-30 cents a month would it be worth it? That's 2 bucks a year, 20 bucks in 10 years....well you get the idea. Hardly seems worth it.
I will shut my truck off instead of letting it idle one time in a month and save more.
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The answer is setting the temperature down is more energy effiecient and hence cheaper then keeping the tub a constant temperature. This is actually a first year physics problem routinely given to explain "work". It's a fact, there really isn't any question about it. This is the reason home thermostats are now programable, you save lots of money over time by turning down the heat while your not there, in bed, etc. Of course having to go out to the tub an hour ahead of jumping in doesn't seem worth while to me. We're at a constant 102!
Not necessarly. The variables include: how much you are dropping and raisng the temperture.? A well insulated spa will see less of a drop in temp and thus requiring less energ/work to return it to it's desired temp ie: how quickly are you loosing heat?
Also consider the The volume of water your are heating and how often you are bringing it back up to temp.
The efficently of the heater is also a significant factor.
I feel the home programable thermostat analogy is abit deciving as home thermostats are part of a larger zoned system that is heating the air (air heats quicker and cheaper than water)in a larger space, with multiple rooms that may or not be used. Plus, a sweater is ok if the room has a bit of a chill. I wouldn't recomend cashmire in the hot tub.
I had an older ineffeinct tub and tried to save a few bucks by bringing down the temp a few degrees and it resulted in the heater and pumps doing more work than simply maintining a constant temp. Your most expesive times to run a heater and pump is upon start up. Energy consumption spikes on start up. With some pumps, getting the pump spining takes more energy than running it for several hours.
Unless you are going to be away for a significant time, dropping the temp and raising it, wont save you any money and will probably cost you a few cents.