15000 gallons
15,000 liters = 3,962.58 US gallons.
It uses as many as you run through it, but who would want to heat hot water?
The answer will depend on the units used for 15000. Millilitres, litres, gallons? And since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.
That's going to depend on the temperature of the water before you heat it, and on how hot you want it to be when you're done.
51210 Btu's in 15kw heat strip. 3.414 * 15000= 51210
264.172 gallons.
The average-size hot tub holds approximately 475 gallons of water. The earliest known hot tubs were calderas. Hot stones were used to heat the water.
1,260 pounds of water is about 151 gallons of water.
About 15,360 gallons.
42 gallons.
44,260 gallons of water.