Search what a furnace replacement costs and you will get national averages drawn from data that has very little to do with your house. The honest answer is that the range is wide, and the reason it is wide is worth understanding — because the same factors that make the range wide are the ones you can actually influence.
What drives the number
Fuel type. Gas, oil, and propane systems differ in equipment cost and in what the installation involves. Converting from one fuel to another is a different job again, with its own venting and supply work.
The capacity your house actually needs. This should come from a load calculation based on your home’s size, insulation, windows, and layout — not from reading the model number off the old furnace. Rhode Island’s housing stock runs old, and a house that has been insulated or had windows replaced since the last furnace went in frequently needs less capacity than the unit it is replacing. Oversizing costs more upfront, and an oversized furnace short-cycles for its entire life, which is uncomfortable and hard on the equipment.
Efficiency rating. Higher-efficiency units cost more upfront and less to run. High-efficiency condensing furnaces also vent differently — through PVC out a side wall rather than up an existing chimney — which can mean venting work that a mid-efficiency replacement would not require.
What can be reused. This is the factor that most often explains why two quotes differ. If the existing ductwork, gas line, electrical supply, and venting all suit the new unit, the job is straightforward. If the ductwork is undersized, the chimney needs relining, the gas line needs upsizing, or the flue configuration has to change, that is real work that has to be in the price.
Access and site conditions. A basement with room to work is one job. A tight crawlspace or a finished attic is another.
What a quote should itemize
Ask for the breakdown. A quote worth comparing should show you:
- Equipment: make, model number, capacity, and efficiency rating
- Labour, separately from equipment
- Permits and required inspections
- Removal and disposal of the old unit
- Any venting, ductwork, gas line, or electrical modifications
- The manufacturer’s parts warranty and the contractor’s labour warranty, which are two different things
If three quotes come back at very different totals, the difference is almost always in this list rather than in anyone’s margin. A contractor who has included chimney relining and one who has not are not quoting the same job, and the cheaper one may simply have left out work that still needs doing.
Rebates worth checking
Rhode Island homeowners may qualify for incentives through Clean Heat RI and Rhode Island Energy programs, especially on heat pumps and high-efficiency equipment. These can be significant, and some require the work to be performed by a participating contractor — so confirm eligibility before you sign, not after.
It is also worth asking whether a heat pump makes sense in place of a like-for-like furnace replacement. It changes the cost picture, the rebate picture, and your ongoing bills all at once, and it is a conversation worth having explicitly rather than defaulting to replacing what was already there.
Questions to ask before you sign
- Did you do a load calculation, or size this from the existing unit?
- What efficiency rating is this unit, and what would the next tier up cost?
- Does this price include permits, disposal, and any venting work?
- What is the labour warranty, and how long is the manufacturer’s parts warranty?
- Which rebates does this equipment qualify for, and do you handle the paperwork?
- Who is the licensed individual responsible for this work? (Rhode Island licenses individuals, not companies — you can verify a license at dlt.ri.gov.)
Getting a real number
The only way to get an accurate figure is to have someone look at the actual system, measure the house, and write it down. Anyone quoting a furnace replacement over the phone without seeing it is guessing, and the guess will be corrected upward later.
Horizon HVAC provides written, itemized quotes on replacement work across Rhode Island, and will tell you plainly when a repair is the better value than a replacement. Call 401-425-9879 or request a free estimate. Financing options are outlined on our financing page, and we help homeowners apply Clean Heat RI rebates to qualifying installations.
