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Can I put a stronger heater in my HotSprings Grandee?

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scoobywagon02:
The spa is full foam insulated so it is designed to hold heat and in my opinion is the best form of insulation. When you open the spa cover you are now losing heat and battling ambient temperature. Two hours with the cover open will result in heat loss which is normal. When you are in the spa with it running you are making the heater work harder to come up to temperature because it is now battling ambient temperature. If you have a thermos with hot coffee and one has a cover and one doesn't which once is going to get cold faster? The heater is more then adequate even in the cold winters of NY. My suggestion would be to make sure you have the temperature set higher before you get into it. It will rise in temperature much faster with the cover closed and when you are in it the spa should maintain temperature just like it maintained the 99 degrees you had it set at when you got in it. Just my two cents..

SerjicalStrike:
You can talk to your plumber about installing a heat exchanger that runs off your home heating system. 

SRay:

--- Quote from: scoobywagon02 on October 10, 2016, 12:06:10 pm ---Two hours with the cover open will result in heat loss which is normal. When you are in the spa with it running you are making the heater work harder to come up to temperature because it is now battling ambient temperature.... The heater is more then adequate even in the cold winters of NY. My suggestion would be to make sure you have the temperature set higher before you get into it. It will rise in temperature much faster with the cover closed and when you are in it the spa should maintain temperature just like it maintained the 99 degrees you had it set at when you got in it. Just my two cents..

--- End quote ---

Thank you for your input and for taking the time to reply. Yes I know all of that. And I HAVE had it set on other evenings to 104 before I got in, but no, the heater in not adequate to maintain that temperature even in the not frigid outdoor temperature of 45-55 degrees. It will easily lose 1-2 degrees per hour.

I had a HotSprings Grandee spa back in the late 80's when there was no 104 degree limit, and it would maintain its temperature even when it was 15 degrees outside. That is not an exaggeration. The truth is that Watkins/Hotsprings makes a 6k heater (as opposed to my 4k) for a reason. And the reason is that a 6k heater will indeed maintain the temperature better. It's just that the Grandee was designed to not draw too much amperage while both the heater and the jets are on. Other models are designed to have either the heater on or the jets on, but not both. My house and wiring can handle the extra amperage and I would like to have that 6k heater in my Grandee.

Chris_H:
You'd need to upgrade your electrical to go to the 6K heater.  The spas where the 6K is utilized (Jetsetter NXT) they use the 30 amp breaker.  Your 4K heater runs on the 20amp.  In the Grandee, the heater stays on when the jets are on.  Only on Hotspring 110V spas does the heater kick off when jets are on.
You'd void your warranty if you change it.

dertl:
Quote:  I even used the override trick to set it to 106 :Quote

What? How is this done? Does it hurt the tub at all?  I would love to get a little higher than 104. I have a 2016 Hot Springs Prodigy.

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