It doesn't matter what it is that you're keeping warm. Air, Bricks,
water, Ectoplasm. It always takes more energy to keep it warm
than it does to let it cool to ambient, and then warm it back up.
Depending on other factors, (mostly insulation) it may not take
*MUCH* more, but it always takes more.
Right, I don't deny that. My point is that the difference in cost is
not a whole lot, and I don't have to wait for my spa to get up to
temperature if I get inspired at some crazy hour to get into it (an
issue in my cold climate, in particular).
You are correct. It will not save "much" money. However, if I know I'm not going
to use the spa for a week or more, I turn the thermostat to it's lowest setting.
That's not much of a bother, and it does save a little energy. Turning the tub
up and down on a daily schedule would not be worth the effort involved. The
economy mode is really most useful for those who only use their tub once or
twice a week or even less. I know people who use their tub only a few times a
month. Others use it more than once a day.
Mine has that feature, but it is not a temperature setback. It only
determines when to run the heater, not what temperature to set it back
to. On my house setback thermostat I set it for 65 degrees at night,
then 72 degrees in the morning. That's a setback thermostat.
Look Dick, I've got 30 years + experience as a mechincal
engineer........energy calcs are part of the biz. Plus I've got 10
years + owning a spa.
Do whatever you want to do with your spa, it's a free country
but lowering the temp of any heated "space" will result in energy
As for the "a quote from one of the largest spa dealers" "It is
to maintain your water temperature on a consistent daily basis during
think what their motivation is.......they want maximum comfort & usage
so you have good things to say about spa ownership, so they will have
you touting their product.
I'd be skeptical that the thermal insulating blankets that you can
float on top of the water add much in the way of energy savings. The
spa should already have 3-4 inchs worth of insulation in the cover. I
find it hard to believe that one of these thin blankets that floats on
top of the water adds much in the way of energy savings, unless there
is something I'm missing about the way they are supposed to work.
I see people here claiming they do work, but I don't see how you would
ever know, since spa electric is bundled in with everything else.
Unless you put a meter on it and monitored it for many days with
similar weather/temps, you'd never know.
On 7 Mar 2006 10:48:22 -0800, firstname.lastname@example.org wrote:
They are pretty effective for the same reason that storm windows are
effective. Another example is the similar bubble mats sold for picnic
coolers. I use one of those in my boat's icebox, and it keeps ice for
almost twice as many days as without. It's not a minor difference. Spa
covers are not airtight where they meet the top rim of the tub. The
hinged area down the center is less well insulated than the rest. I
can tell this by how the snow melts on the cover. It always melts over
the hinge first.
All that said, I stopped using a floating mat because it was a pain in
the ass to deal with. My medium sized spa costs about $30 a month to
operate. You can either drive yourself crazy trying to save $5 a
month, or you can simply decide if you really want a spa or not. At
$30 a month, I find it worth having. Think about some of the other
things you spend money on and this becomes a bargain. You could save
money by remembering to turn off the lights when you leave a room. In
my kitchen, I have a 25 watt lamp near the fridge that can be left on
for the evening, rather than leaving 8 75 watt halogens blasting. It's
enough light to get around and pour yourself a drink. Don't run the
dishwasher, washing machine or clothes dryer unless they are full. If
your car is paid for, drop the collision insurance. And so on...
I got a question for you.
I have never had or even used a hot tub, so this question lingers in
You got the hot tub outdoors. Winter or Summer you use it. To use
it, you got to go outdoors to get in, which means removing the cover
(which I am sure takes some time). You crawl into it and it's nice
and warm. OK..... So far this all makes sense.....
Except for one thing.... You obviously take your clothes off, and I
would take a guess that you wear some swimming gear at least during
the day when neighbors can see you.
Here comes the confusing part. (especially in winter)
You have to walk outdoors practically naked. The outdoor temperature
is below zero. That alone sounds more than I'd want to deal with.
Then when you get out of that thing, you are soaking wet, and standing
in sub-zero weather almost naked. Even if it only takes 3 seconds to
get into the house, that sounds horrible.... And that dont take into
account how and when you put the cover back on that thing.
Why would ANYONE put one of these things OUTDOORS in a climate that
gets cold in winter? The tub itself might be wonderful, but getting
in and out of it in winter sounds horrible.
The worst part is the wet swim trunks; they do get cold fast. Walking 15
feet to the tub with dry swim trunks is no problem at all. The hot tub
cover is on a hinge so it's also no problem at all. Where I live the
temperature range is low 30's and up for winter nights, so you'll have to
ask someone else about the subzero scenario.
Personally I don't get into the tub very often during daylight hours.
For me it's more of a nighttime activity; sitting under the stars listening
to the breeze blowing through the trees and just relaxing in a hot tub is
The outdoor hot tub concept is one you'll have to experience for yourself to
understand; maybe you'll like it, maybe you won't.
On Wed, 08 Mar 2006 14:41:39 -0600, email@example.com wrote:
Actually, winter is more enjoyable than summer. I have been in indoor hottubs,
and they were uniformly awful.
The cold really isn't a factor until it gets down around 5F. I go out and open
the tub ahead of time. Then it's a few seconds in the cold with the reward at
the end of slipping into that wonderful bubbling hot water. After being in there
for 20 minutes or so, you are heated up enough that you don't really feel the
cold when you get out. We have a big hill off to one side, and my wife and her
friends like to periodically jump out of the tub and roll down the hill in the
snow naked. It's a riot, especially when one of them goes off course and ends up
stuck under a shrub.
On Wed, 08 Mar 2006 14:41:39 -0600,
For many people, it is indeed horrible, but not for me and certain of
my friends in western New York, where I really enjoy using the spa in
20F temps with snow coming down. I was smart enough to put the spa
not too far away from the back door (about 15 ft.), so I can sprint
outside, plug in the party light strings (to fool the motion detector
light into staying off), lift off the spa cover, drape my towel over a
nearby deck chair, and leap into the warm water. I stay in my spa an
average of an hour at a time, and by the end, I'm pretty thoroughly
warmed up so by the time I need to get out, my internal core
temperature is radiant enough that I don't feel the outside air temp
or the snow too severely.
It's really about the contrast, especially with fresh snow on the
ground, the perfect time to get out of the spa after warming up
thoroughly and then lying down on some clean fresh cold snow for the
rush (not recommended for people with heart conditions) and then
leaping back into the spa. This is what Scandinavians do, all the
I hate using my spa in the summer. What's the point? There's no
temperature contrast, no thrill, no quickening of the senses.
Nothing is greater than sitting in a hot tub in the freezing cold as snow
flakes land on your face and feel so refreshing....yah, it's really cold
going out and getting in the tub at first, but after about 5 mins. when your
body temp has risen, you don't feel the cold anymore, so when it's time to
get out, it's no big deal..personally I wouldn't lay in the snow afterward,
but I can say from experience, an outdoor hot tub is awesome!!!
C in NY
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