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Question DetailsAsked on 4/8/2014

how much is a oil to gas coversion in the bronx ny ?

there is a gas meter in the house for cooking. I have a 8 year old oil boiler which gives steam heat.

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1 Answer


Here are a couple of prior responses to that type of questions, parts of which might not apply to you since you already have gas service, if it was sized for as water heater furnace - commonly 1 inch service line but 3/4 in many cases if run is short to water heater/boiler/furnace -

Note the pricing in the two cases was estimated differently because one of the systems was likely an old heavy cast iron unit with asbestos cement insulation which will likely not be the case with yours, whereas the other sounded more modern.

More cases in the Home > HVAC link right under your question.

I would start by contacting the manufacturer of your unit - because for an 8 year old unit, they may have a natural gas conversion kit for typically in the $500-1000 range as I recall but some come as low as $300 range - total installed cost $1000-1500 probably IF your flue system is properly sized - otherwise possibly $500-1500 more depending on difficulty and how many stories it is to roof. Because oil furnace/boiler burns about 400 degrees hotter than natural gas, commonly you have to change flue size when changing fuels, which can get very expensive if the flue is original or goes up on old chimney with offsets in it.

I would so a bit of research, because your boiler is probably only going to be about 60-75% efficient after conversion (manufacturer should have efficiency info if they make a natural gas conversion kit) because the chamber and heat exchanger (boiler passages) are different for oil and gas boilers, and many gas companies give discounts to change to a new gas furnace/boiler, so with gas company discounts and energy rebates and such, you might be better off getting a brand new higher efficiency gas boiler. You would have to get at least 3 bids to see - and maybe ask for both conversion and replacement options on the bids to see what the difference is.

Answered 5 years ago by LCD

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