On Jun 21, 7:51 am, Roy Starrin wrote:
On Wed, 20 Jun 2007 18:10:13 -0000, Ben wrote:
Any suggestions appreciated!

Maybe not what you and the others want to hear, but years ago, when my
kids were in their teens, it became impossible to meet all of the
shower, bath, laundry demands. I simply installed an electric hot
water heater in series with tankless coil output. The boiler then
preheated the water and the HWH kept it hot. Thru a set of
judiciously placed valves I can cut the HWH system out of the system
(In hurricane aftermath, the generator will handle the boiler, but not
the HWH)
My Burnham is 40+ years old; no way would I ever attempt to replace
that coil - nor would my HVAC guy.
Works for me


I have the same setup you have. Weil-McClain tankless oil
boiler...their smallest one too. It was installed in 1999 and has had
no issues since. I believe my hot water supply is endless. We have
used to for filling large bathtubs, running dishwasher laundry often
at the same time. Our issue has been a notice in pressure drop more
than anything else. Our water though is always very very hot and we
have never run out. Boiler is set at 180F high and 160F low. Our
water is not hard at all, all have is a whole house filter. It's
either you mixing valve or your coil...or the aquastadt. These units
are generally very reliable.