What size water heater?

[LeoKa]

We are looking into replacing our 20 gallon tank.
I am thinking about replacing out rusting unit with one of these.

https://www.homedepot.com/p/Westing...tainless-Steel-Tank-WER020A1X020N10/305554770

We do like a hot shower in the PNW winters..

Thoughts?

I have replaced my old 20g tank with a new 30g. They do exist, with a single 2000w heating element. A second element can be added later. It is not much larger than the 20g and gives you longer showers. I bought it from the same store as the one you quoted, but the 30g version was only available online.

 

[Caballero II]

Remember, one can replace the electrical heating elements. Of course one should investigate the sludge level in the tank prior to making a decision.

Hmmm? How do you evaluate the "sludge" level. Good topic. I think my GB 36 has a Raritan of about 11 gallons or so, and may be as old as my boat. 1982.

 

[Simi 60]

Found this nice site to calculate power used to make hot water.


https://bloglocation.com/art/water-heating-calculator-for-time-energy-power

 

[rslifkin]

Found this nice site to calculate power used to make hot water.


https://bloglocation.com/art/water-heating-calculator-for-time-energy-power

Definitely a handy calculator. I made good use of it when deciding on my replacement water heater.

 

[OldDan1943]

Of course if you have a set up to heat the HW from the main engine too, that negates the formula unless you can isolate the the main engine from water heater.