We should create a FAQ for tankless.....
The issues are first the cost to convert. Figure for electric a new
service entrance dedicated to just heating water, at least a 100 amp
but probably 200 amp plus regular service for everything else.
it takes a LOT of power to instaneously heat water...
If you go LP figure in a much larger tank and lines upgrade. again it
takes a lot of gas to instaneously heat water. natural gas will likely
require larger gas lines and perhaps a new meter for higher flow.
the only energy you waste with a regular gas or electric tank is
standby losses in summer. in winter standby loses help heat your home,
so the energy isnt really wasted.
its soiunds great to never run out of hot water:) some folks like
teenagers use that as a excuse to take endless showers increasing
on low flow say cracking a valve open to wash hands the flow may be
below the minimum to trip it on, so cold hand washing
check carefully the flow vs temp rise. in summer it may not matter but
say cold winter water temps may leave you never really hot enough when
If you have a good supply of LP upgrading to that for water heating is
probably a good idea using a standard hot water tank.
the tankless although liked by some have lots of negatives and the
payback or savings will likely exceed the life of the unit.
to save energy add a insulating blanket to your existing tank.
to never run out of hot water series connect your existing electric
tank with a new LP one, electric first. at times of high demands power
on electric tank ands enjoy nearly endless showers.
My current tank is 75,000 BTU 50 gallons natural gas, Installed in 2000
I rarely run out of hot water. I wouldf of gone 75 gallons but it
i hate cold showers