Hours to heat spa

[pwest]

There are some tables at http://www.aquapoolstore.com/heaters/po ... PIPESIZING that suggest:
- your 1" gas pipe is the correct size as long as your run is less than 100'
- a 175k BTU heater should raise a 1,000 gallon spa 30 deg (F) in 107 mins (about 0.28 deg/min)
Your results (49 deg increase in 173 mins = 0.283 deg/min) are in line with this, so things may be as they should be if your spa is around 1k gallon.

-Phil

 

[Hemess]

There are some tables at http://www.aquapoolstore.com/heaters/po ... PIPESIZING that suggest:
- your 1" gas pipe is the correct size as long as your run is less than 100'
- a 175k BTU heater should raise a 1,000 gallon spa 30 deg (F) in 107 mins (about 0.28 deg/min)
Your results (49 deg increase in 173 mins = 0.283 deg/min) are in line with this, so things may be as they should be if your spa is around 1k gallon.

-Phil

Hmmm...I am heating now. It is not windy. Temp is 43 degrees. The spa has gained 19 degrees in one hour.

 

[Heater]

Screw that chart. I have facts, MY SPA! I'd be willing to time it again to make sure it wasn't a "fluke". Your builder has an issue with your current set up.

 

[Hemess]

Heater...totally agree. I gave up last night after 2 hours and it gained 31 degrees. I had to go to sleep.

Should be getting that gas bill any day now...

 

[Heater]

I don't know how your builder OR anyone else can look you in the face and say its working as advertised. That's just stupid. Who in their right mind would ever buy something with the expectation of what you are experiencing!?!?!? NO ONE! I feel so bad for you man you're getting the run around. Don't give up man make them fix it!

 

[bigfunky]

I'd check with the gas company, you may need a larger gas meter. The one you have may not be able to supply enough pressure at the rate your heater needs it.

 

[BoDarville]

FYI, I just posted a spreadsheet to estimate natural gas heater runtime and cost for heating pool/spa water for a desired temperature rise here: Natural Gas Heating Time & Cost Calculator Spreadsheet. Feel free to give it a test-drive.

 

[f3justusc]

So, then what happened........??????

 

[Heater]

No update on this?

 

[Vegas Kid]

4 hours is just stupid.

Either you're regulator is undersized or the heater is probably cutting in and out.

I'd also suggest getting a thermal blanket to put on top while you heat it up...will help with the heat loss...

 

[pragmatic]

FWIW-Our 1400gal spa with a Pentair MasterTemp 400 from 63 to100F takes about an hour.

 

[Heater]

No need for a thermal blanket if the system is running correct.