Hello, I'm looking for info/advice/cost from all of you regarding heating a pool in winter.
First some specs:
Fiberglass pool 10,000 gal
Gas heater 400,000 btu
Southern California desert
Months to heat Nov-Feb [pool is heated by the sun all other months]
Worst scenario ranges during the above months [usually Jan] Air Temp 70ºH/ 45ºL, Water Temp 50º
Desired swim temp 80º
Daily swim/therapy at 3pm
Scenario 1:
Have heater hold a constant ±70º, then bring the temp up to 80º at 3pm [lots of short cycles to hold, one longer cycle to boost the last 10º]
Scenario 2:
Let the temp drop everyday [no heater] to ±50º, then bring the temp up to 80º at 3pm [one massive cycle every day to raise all 30º]
My spa [475 gal] heats at about 1º per minute, so using that as a rough guide 10,000 gal would take 10.5 hrs to raise 30º
The Gas Company estimated ±20 Therms/day heating 5 hrs x 30 days = ±$600 month [ouch!!] at 10 hrs we are looking more at $1200 [double ouch!!]
Not looking for solar or pool cover info.
Look forward to hearing from you all
First some specs:
Fiberglass pool 10,000 gal
Gas heater 400,000 btu
Southern California desert
Months to heat Nov-Feb [pool is heated by the sun all other months]
Worst scenario ranges during the above months [usually Jan] Air Temp 70ºH/ 45ºL, Water Temp 50º
Desired swim temp 80º
Daily swim/therapy at 3pm
Scenario 1:
Have heater hold a constant ±70º, then bring the temp up to 80º at 3pm [lots of short cycles to hold, one longer cycle to boost the last 10º]
Scenario 2:
Let the temp drop everyday [no heater] to ±50º, then bring the temp up to 80º at 3pm [one massive cycle every day to raise all 30º]
My spa [475 gal] heats at about 1º per minute, so using that as a rough guide 10,000 gal would take 10.5 hrs to raise 30º
The Gas Company estimated ±20 Therms/day heating 5 hrs x 30 days = ±$600 month [ouch!!] at 10 hrs we are looking more at $1200 [double ouch!!]
Not looking for solar or pool cover info.
Look forward to hearing from you all