spa temp in winter

[enjoyjoshua]

This is our first winter with our inground fiberglass salt water spa. We're in Northern Indiana and will see temperatures in the teens and tens at some point during winter. We have a gas heater that heats very quickly. We've been maintaining 80 degrees and turning it up to 99 when we want to use it. With air temperature in the 30's, it's been taking about 15 minutes to heat to 99 from 80.
Since it does heat up to desired temperature so quickly and efficiently, we're curious if it would make sense to lower the temperature below 80 during non-use to save on energy. Is there a standard? Could we get away with 65 or 70? Thank you!

 

[RDspaguy]

If your controller lets you. Some have a minimum of 80 for the spa.

 

[enjoyjoshua]

Thank you. Yes, it's Hayward Omnilogic and we can set any temp. What's hard to tell is whether maintaining 80 makes much difference in gas costs than maintaining 65. We're on propane, but so is our furnace and oven, etc., so very difficult to monitor consumption of just the spa heater.

 

[RDspaguy]

With a tight fitting cover, inground spas are very efficient. It might save you a few $ a month, but it's not going to pay for that cruise or anything.