Just filled hot tub(cold water) how long will it take for the water to heat up? i have the heater on.

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Just filled hot tub(cold water) how long will it take for the water to heat up? i have the heater on.

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How big is the heater and how big is the tub? The heater and tub should have a BTU/gal rate or a Kilowatt/ liter rate listed on them. Some simple math should give you the answer.

Is this a large hot tub outside? If yes then it probably has a 4000 watt heater in it which can raise the water temp an average of 10-12 degrees per hour depending on the model. Water comes out of the tap at around 55 degrees so to get to 98 degrees it will take about 4 – 4.5 hours to heat it up with it covered in mild weather. Hope you enjoy it.

I’m not sure, but my best guess would be three hours or so.

Check the manual. I’m sure it explains times.

It depends on the heater.A 120 volt heater will take about a day and a half.A 220 volt heater will take about 12 hours.