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Question DetailsAsked on 8/19/2013

how much is oil furnace replacement generally run? need split between equipment & avg labor; & duct work cleaning

example of equipment: Regal Star / Bechett Burner; what would be reasonable BTUH (input/output)?
House is ~1250 sq ft 2 story --old 1904 build / NO asbestos
Need range of cost estimates / for:
warm air furnace;
duct cleaning;
12' section 6 inch wide pipe replacement for warm air supply at furnace;
removal old furnace and burner; and
std wiring expected;

What would be expected labor component;(hrs ..avg cost per hr )

Also -- what is estimated elapsed time for the install and removal of old

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1 Answer


You can find other posts regarding furnace replacement issues and costs, including asbestos if that applies, in the Home > HVAC link right under your question.

Ballpark numbers for your case, just to know what sort of numbers you should be seeing in your bids -

Total job range $2-10,000 - usually in $3500-6000 range including installation. Installation typically about $1500-3000 labor, at typically about $250 plus or minus $50 per manhour, and about 3-4 hour bare minimum with 2 men with almost zero plumbing changes to about 8 hours with some plumbing and duct modifications and addition of some safety devices now required by code. Usually a long day to two elapsed days, so best to get it done before cold weather sets in,, though in a pinch contractors are usually prepared to set up temporary heat supply if necessary, though increases job cost about $500.

Unit rated Btu needs to be calculated based on your house configuration and duct system, window expanse, insulation, whether waste heat from the furnace will help heat the house (like in tuck-under garage or interior utility room) or heat the outside (outside utility room or in detached garage or unheated basement or in attic), ambient heating conditions (inside to outside temperature differential on coldest day), local code requirements, whether forced air or baseboard or steam heat, etc. Could range from 30,000 Btu in a highly insulated home to 60,000 or so in an older home with antique insulation to as much as 100,000 Btu in a clapboard house with no vapor barrier, house wrap, or insulation. You need a certified heating contractor to run the number to see what you case calls for. Nameplate rating needed also depends on the unit efficiency - going to a high-efficiency unit could cut 10-20,000 Btu off the required nameplate rating, which is based on energy input to the unit rather than the actual amount of heat that makes it into your heating system rather than to radiated and up the stack losses.

The 12' piece of duct rerplacement would probably add about $200-250 additional, assuming it is accessible rather than hidden in ceiling. If in finished ceiling, probably a bit more than double that by the time you get drywall fixed and painted.

Duct cleaning typically about $250-400 for one that actually does something - high pressure air or mechanical brush run clear through the ducts rather than just hooking a vacuum to it. Since this sounds like an nolder house, I would seriously consider getting the ducts sealed with a reputable spray-in sealer like Aeroseal right after the cleaning if your ducts are in outer walls or unheated or open crawlspace or basement, as it greatly reduces your duct air losses into places where the heat largely goes to waste.

Answered 7 years ago by LCD

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