Water Heater Size For Whirlpool Tub

03 18 2012 at 6 35 am.

Water heater size for whirlpool tub. A standard whirlpool tub requires one 15 amp gfci receptacle to run the motor. A very small bathtub might hold 40 gallons while a larger single person bathtub could. Determining if a water heater is large enough for a bathtub is actually pretty simple. Before we get to how to use the calculator to size a tankless water heater let s talk about the factors that go into understanding what size inline water heater you need.

Your tub is only halfway full and you re out of hot water. Before we talk about tankless hot water heaters here is a recap of the above. For a tank style heater household size is a simple indicator of hot water needs. However every family has different water demand requirements.

We fill it halfway wait about 40. You can fill it but no one else can take a hot shower for about an hour or so until the water heater catches up. If filling a fairly large whirlpool tub is something you like to do you re stretching the capacity of a 50 gallon standard water heater. We already covered gpm.

This will happen if the water heater isn t large enough for the bathtub. 1 or 2. That is a water heater in the north either tank or tankless will need a higher btu input in the winter than the summer to heat and deliver water to a given temperature. Consequently these are the two most frequently installed sizes.

For example if you have a 40 gallon water heater it would be just large enough for a 60 gallon bathtub. You can estimate the necessary tank capacity in gallons based on the number of people in the house. The water heater tank should be about 2 3 the size of the bathtub. A 15 amp circuit is the minimum standard but a 20 amp is better and is required by some tub manufacturers.

If your whirlpool tub is equipped with a heater you will need an additional 15 amp gfci receptacle. You should post a photo that sounds like a cool tub but an average hot water heater is 40 gallons it would take 2 3 tankfuls to fill that tub. We have a 6 foot whirlpool tub in our bathroom that we hardly use because filling it takes more than an hour since we only have a 40 gallon water heater. Tankless water heater sizing calculator.

Usually most homeowners find that either a 40 or 50 gallon hot water tank is the best fit for their needs. For tankless water heaters the key criterion is hot water flow rate.