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wrote:
I will be building a 100' long home with water usage at the two ends
of the house.

At one end will be a mostly over the garage apartment for my daughter
with kitchen, bath, laundry. Also there will be a bath with on the
first floor with our kitchen and also laundry and utility tubs in the
laundry and garage.

In the middle will be a 2nd floor guest bath.

On the other end will be a first floor master bath with shower and 72"
jetted tub (Venus II).

A priority is not to have to wait "forever" for hot water to reach a
spigot, especially at the kitchen & lavatory sinks and utility tubs.

I am planning to have a hot water heater in the garage and another
under the master bath (crawl space here will be about 6 feet high due
to land slope).

How large should I make each water heater. Should I have a separate
additional heater for that huge tub and only turn it on when needed?

Many thanks for any knowledgeable help!

I would also go with the single HW heater and a return loop. Get the
pipes well insulated or an on demand system.

As for sizing the HW heaters, maybe some more information would be in
order.

How many people how many bath rooms. Dish washer?

How about schedules. Will everyone be using the hot water at the same
time as also running the clothes and dish washers? Any big spas?

--
Joseph Meehan

Dia duit