Turning on heater to help with cold temps

dphanes

Well-known member
Aug 19, 2020
50
NC
it is going to get quite cold here tomorrow (low 20s) and wanted to get peoples thoughts about running the heater during the day to get the water temp up a few degrees before it gets very cold tomorrow night. More worried about negative issues with the pool trying to use heater to help and not so much the cost of heating.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
22,113
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Your signature does not say what heater you have.

The Pentair MasterTemp Heaters say:
  • Operating this heater continuously at water temperatures below 68° F. (20° C) will cause harmful condensation and will damage the heater and void the warranty.
  • When starting the heater for the swimming season with a water temperature below 50° F (10° C), the heater may be used to heat the water; however, make sure that the heater operates continuously until the water temperature reaches the heater’s minimum setting of 68° F (20° C).
The Hayward H-Series heaters say "Do not use the heater to maintain the water temperature just above freezing or for freeze protection."

 

dphanes

Well-known member
Aug 19, 2020
50
NC
Your signature does not say what heater you have.

The Pentair MasterTemp Heaters say:
  • Operating this heater continuously at water temperatures below 68° F. (20° C) will cause harmful condensation and will damage the heater and void the warranty.
  • When starting the heater for the swimming season with a water temperature below 50° F (10° C), the heater may be used to heat the water; however, make sure that the heater operates continuously until the water temperature reaches the heater’s minimum setting of 68° F (20° C).
The Hayward H-Series heaters say "Do not use the heater to maintain the water temperature just above freezing or for freeze protection."

We have a Jandy JXI400N. Current water temps is 56 so was going to get that up to around 60 and then turn it off and over the next couple days that will drop but the extra 3-4 degrees would help keep temp up a bit,
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
22,113
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
I think you heater will struggle to give you much of a temperature rise if you don't have a pool cover.

I am not sure what you expect to accomplish by running the heater and I don't think it will make any difference in your situation.
 

wireform

Silver Supporter
In The Industry
Aug 15, 2017
1,646
Spring Valley, NY
As it has been said running the heater below 68° is just shortening its life for no benefit at all. When the temps get that low keep the water circulating and you'll be just fine.