should a heat only hot water boiler be cold start?

Jim Pompetti

Look At reset

JOHNNY10

IN A LARGE HOUSE @ 6000 SQ. FT SHOULD A HOT WATER HEAT ONLY WATER BOILER BE A COLD START OR MAINTAIN TEMPERATURE
WHICH WOULD SAVE MORE FUEL?

JOHNNY10

Supply House Rick

What?

Please clarify your question

JOHNNY10

SHOULD A OIL FIRED HOT WATER BOILER FOR HEAT ONLY PURPOSES NO DOMESTIC HOT WATER COIL BE A COLD START BOILER OR MAINTAIN BOILER WATER TEMPERATURE WHICH WOULD BE MORE EFFICIENT AND WHY WOULD YOU WANT TO MAINTAIN TEMPERATURE FOR HEAT ONLY PURPOSES

Leo

Read the post

Read the post titled non-maintaining boiler start question

Leo

JOHNNY10

IT DIDNT GIVE ME MUCH INFO

A.J.

Heat only

You wouldn't leave your car running 24-7 juat incase you might go to the grociery store some time that day.Don't leave the boiler sitting at limit bleeding BTU's up the chimney 24-7. Leave it cold start.

D107

issue of expansion/contraction?

my boiler guy advises not to have it cold start due to increased wear and tear on boiler due to greater expansion and contraction arising from greater temperature fluctuation.
(Probably much less an issue in the really cold weather when heating cycles are more constant.)
any thoughts?

David

Steve_35

There are certainly differing opinions.

We only do cold start boilers unless there's a domestic coil and I can't remember the last one of those we installed. Probably 10 years at least.

Some say there's a difference in cleaning cold start vs maintaining boilers but we haven't seen that in the ones we regularly service.

jeff_51

couple of ideas

nothing wrong with cold starts, thats only spring and fall anyways, but you could go with constant circulation with preferably a multi speed pump and an outdoor controller. That would lower your temp, give you a flatter heat curve ( which usually means more even heat). Don't know how you are set up with zones or primary secondary piping, but those can pretty easily be rectified.