A thought

singh

type of job I looked at recently.
What I suggest is a OD reset control like Taco pc 700.
Limit the temperature so the RETURN is not less than 140* (if C.I)
If you have to do any piping , then add bypass or do pri/sec piping,
then you can lower the return temps even greater. If a condensing boiler
the lower the better. The savings are there.
OD reset is the key. you only need that 56,000 on design days and baseboard should be ok at 160*. I would look into last room on loop, and if that can be satisfied at the lower baseboard temps.

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KAG

To much baseboard

O.K. I went to a job and the customer wanted options for replaceing old boiler. I told them I will do a heat loss and get back to them with estimate. Here is the question.

As I was taking measurements I noticed to much baseboard in each room. Every inch of outside wall and in some rooms inside walls had baseboard. I did the heatloss and come up with a low BTU output (117,000 old, 56,000 new)can I lower the temp of water on boiler (180 degrees to 140 degress) with the lower BTU output boiler and lower the HO operating cost even lower or will it not heat the home. My heat loss was based on 180 degrees.