Sizing a boiler for intermittant use

Old 03-03-05, 06:51 AM
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Question Sizing a boiler for intermittant use

We live in one side of a two family home.Each side is approx 2200 sq ft. We have a hot water heating system and hot water also comes off the furnace.
We live in Central upstate NY, a cold area....

The other side of the house has been unheated and unlived in for years. We are planning to renovate the other side of the house and run it as a B&B. As a B&B the heating and hot water use will be more intermittant, as an example we see it as mostly getting summertime use, not a lot of tourists around here in the winter, and yet there might be customers in the winter.

We need to replace the furnace on our side of the house. Should we be thinking of sizing the new furnace on our side to heat and provide water for both sides ? given the likely intermittant use of the other side of the home I am afraid that this will result in oversizing the furnace on our side and lead to inefficency. Even though its more costly should we look to installing a smaller furnace on the other side ?

Do they make variable (switchable) capacity furnaces so that we can efficiently switch off half the heating zones ? perhaps use baseboard electric as a heating meathod for variable but peak periods in the B&B room ?

Thanks for your advice..
Old 03-03-05, 02:34 PM
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1 or 2 boilers

I would certainly suggest getting 2 separate boilers. Not only does this prevent gross oversizing, it's nice come tax time. There is no question as to how much of the heating bill is for the business & how much is for home. While you are renovating you should also have separate electric & gas meters installed for the B & B.

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