Hot Tub Forum

Original => Hot Tub Forum => Topic started by: sjde on May 30, 2019, 01:47:51 pm

Title: How long does it take your water to heat up?
Post by: sjde on May 30, 2019, 01:47:51 pm
We have a 375 gallon hot tub. On a refill , how long do you expect it to take for yours to heat up?

Ours just took 18 hours and that seems excessive. We figure the tap/hose water is about 50 degrees year round.  Outside temp was cool-40's- but that shouldn't matter since the spa is well-insulated.
Title: Re: How long does it take your water to heat up?
Post by: Spatech_tuo on May 30, 2019, 02:00:36 pm
We have a 375 gallon hot tub. On a refill , how long do you expect it to take for yours to heat up?

Ours just took 18 hours and that seems excessive. We figure the tap/hose water is about 50 degrees year round.  Outside temp was cool-40's- but that shouldn't matter since the spa is well-insulated.

220V hook-up?
Title: Re: How long does it take your water to heat up?
Post by: bud16415 on May 30, 2019, 02:35:44 pm
I leave the cover open until the tub hits the air temp. Our tub same size as yours 240V and starting temp about the same i would guess about 12 hours. I have my fill hose hooked to both hot and cold water and if I'm in a hurry or doing a partial drain I can add up to 50 gallons of 150f water. That speeds it up a lot. I often use the hot water to top it off before we get in.   
Title: Re: How long does it take your water to heat up?
Post by: sjde on May 30, 2019, 03:18:58 pm
Yes, 220V
Title: Re: How long does it take your water to heat up?
Post by: BullFrogSpasMN on May 30, 2019, 03:56:59 pm
need more info on the spa itself, some manufacturers are putting heaters as low as 3.5-3.7kw all the way up to 5.5kw in 220V spas so depending on heater size it could take 16-18 hours, 12-14 for the larger heaters
Title: Re: How long does it take your water to heat up?
Post by: sjde on May 30, 2019, 05:19:34 pm
I don't think I'd find that info in my manual but it's a Caldera Vanto spa. I did find this-
HEATER OUTPUT

Hi-Flow Heater (4,000 Watts)
Title: Re: How long does it take your water to heat up?
Post by: castletonia on May 30, 2019, 07:41:28 pm
I would expect 10-12 hours for a Vanto depending on starting water temp.
Title: Re: How long does it take your water to heat up?
Post by: Ralith on May 31, 2019, 10:15:44 pm
My 550g Artesian Island Margarita Elite took about 10-12 hours... approx 3-4 degrees an hour.
Title: Re: How long does it take your water to heat up?
Post by: sjde on June 05, 2019, 01:20:05 pm
I shouldn’t have taken the salesman’s word for it . He said 8 hours. When I called the manufacturer she said 3-5 degrees / hour, so that’s 10-18 hours,  and it seems we’re on the longer end.