General > Beating a dead horse
full foam vs thermopannels
Micah:
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Sure sounds good. Unfortunately, it is completely wrong.
If you take a poorly insulated tub and put a great cover on it, you will still pay a fortune to keep it hot.
8-)
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So the study that shows that in an average climate (Southern California to be exact) you loose 90% of your heat through the cover or where the cover meets the spa. Are you saying that is incorrect.
drewstar:
--- Quote ---So the study that shows that in an average climate (Southern California to be exact) you loose 90% of your heat through the cover or where the cover meets the spa. Are you saying that is incorrect.
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SO CA is an "average" climate? :-?
Dr. Spa™ Ret.:
Study? What study?
As chas says, HEAT does not rise. Heated substances though do rise. Air or water, when heated expands. This make it lighter than what's around it, and it rises. This, is called convection. Once that heater "substance" hits a solid barrier, convection ends, and conduction take over. Heat will conduct rather equally in all directions. Hence the reason homes floors are insulated :)
Now, as for more heat escaping through the cover compared to the sides of a spa.... well, figure out the R values. The average cover is R-12 - R-14. Put 6" - 10" of full foam insulation around a spa and yeah, way more heat will travel through the thinner cover.
Tailhooker:
--- Quote ---I suggest pouring a tall drink, get a snack, find your most comfy chair (although you didn't sit in it prior to buying it ;) ) and search the PAGES of debate on this subject over the past 5 years on here benalexe...
nuff said...
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That's what I tried to say earlier!!! ;D
Spatech_tuo:
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Now, as for more heat escaping through the cover compared to the sides of a spa.... well, figure out the R values. The average cover is R-12 - R-14. Put 6" - 10" of full foam insulation around a spa and yeah, way more heat will travel through the thinner cover.
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It all depends on the combination of your spa. If it is a well insulated spa with a cheapo low R cover then sure, you'll lose a great deal of energy out of the top. If however, you have a great cover and poorly insulated sides then much more of that energy loss will be out the sides than in the previous example.
You don't just need a good cover, you need a well insulated spa in ALL directions.
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