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In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Large heating bills - where to go from here
We had a $600.00 heating bill for the month of December. I'm looking at making some changes.
Currently this is the set up:
Slant Fin Sentry 210,000/176,000 gas boiler. 98,000 BTU's of cast iron radiators on the first
floor. 3/4 inch pex to a Watts manifold and 1/2 inch pex to the radiators.
A Unico System hot water coil with 25 outlets on the first and second floor. Installed capacity
is 70,000 BTU's. 3/4 inch pex supplies the hot water coil.
There are two zones, one pump. A thermostat on the first floor is dedicated to the cast iron radiators.
A thermostat on the second floor is dedicated to the Unico System.
The house is a 4,500 sq ft. 3-story Victorian built in 1888. The finished 3rd floor is not heated. There
are 10 foot tall ceilings and a large, central foyer with a large, open staircase.
I was thinking about ditching the 210,000 boiler and getting two, high efficiency boilers - one dedicated
to the first floor cast iron radiators with an outdoor reset and one dedicated to the Unico System. The current boiler short-cycles like crazy.
I was also considering under-floor heat to provide some warmth underfoot, though not necessarily shouldering a
significant amount of BTU's.
We had the Unico System installed last year as we bought the house with freeze damage. I knew nothing about HVAC
at that time. It was undersized for the house, so I added the radiators myself this Fall. I'd like to salvage
the Unico System and dedicate it to the second and third floor.
Is this a good approach or should I consider something else?