Key takeaways
- No honest contractor can give a firm price without seeing your house. The ranges below are for planning only.
- The biggest cost drivers are the type of system, the size of the house, and the condition of your ducts or piping.
- Installation labor and extras such as electrical, venting, and duct work often account for a large share of the total.
- A cheaper bid that skips a load calculation or a duct check can cost you more over time.
- Incentives may be available. Confirm current terms before you decide.
An honest note about prices
Cost guides are easy to find and hard to trust. Heating and cooling prices depend on the house, the equipment, the labor involved, the season, and the market. The ranges in this article are rough planning figures in US dollars, based on the general pattern of installed pricing for residential systems in the Northeast. They are not quotes, they are not taken from a single published survey, and they will change over time. Use them to understand the shape of a decision, not to judge a specific bid.
The only way to know what your project costs is a written quote after someone has looked at your house. We offer a free estimate for replacements and new installations.
Rough planning ranges by system type
| System | Rough range | What pushes it up or down |
|---|---|---|
| Gas or oil furnace replacement | $5,000 to $12,000 | Efficiency, size, venting changes, chimney liner, duct modifications |
| Central air conditioner added to existing ducts | $6,000 to $14,000 | Size, efficiency, coil compatibility, electrical work, duct condition |
| Furnace and central AC together | $11,000 to $24,000 | Combined efficiency and staging, duct changes, scope of electrical work |
| Boiler replacement (gas or oil) | $7,000 to $16,000 | Boiler type, piping updates, zoning, venting, indirect water heater |
| Ductless mini-split, single zone | $3,500 to $7,500 | Capacity, line set length, wall type, electrical |
| Ductless mini-split, multi-zone (3 to 4 rooms) | $10,000 to $22,000 | Number of zones, indoor unit type, outdoor unit size |
| Ducted heat pump, whole house | $12,000 to $25,000 | Existing ducts, cold climate rating, backup heat, electrical service |
| New ductwork for a house without any | $6,000 to $20,000 or more | House layout, access, number of runs, finished spaces |
What actually drives the price
- Type of system. Replacing a furnace with a furnace is usually the least complicated. Switching system types often adds duct work, piping, venting, or electrical.
- Size and capacity. Larger houses need more capacity. But the right size comes from a load calculation, not square footage alone.
- Efficiency rating. Higher efficiency equipment costs more. It also uses less energy to do the same job, so the payback depends on how much you run it. In a New England summer, central AC runs fewer hours than in warmer regions, which changes the math.
- Staging and features. Two-stage and variable speed equipment costs more and delivers more even comfort and quieter operation.
- Ducts and piping. Ducts that are leaky, undersized, or poorly routed may need repair or modification. Old boiler piping can need updates.
- Access and complexity. Tight attics, finished basements, second-floor air handlers, and long refrigerant runs add labor.
- Electrical and venting. New circuits, panel upgrades, new venting, and drain lines add to the scope.
- Removal and disposal. Taking out old equipment, and in some cases an old oil tank, is part of the job.
- Permits and inspections. Required in most towns for new equipment, and part of a properly done job.
- Season and availability. Installers are busiest in the first cold stretch of fall and the first heat wave of summer.
Purchase price is only half the story
What you pay each month to run the system matters as much as the install price over the life of the equipment. Efficient equipment, good ducts, and proper maintenance reduce operating cost. Fuel prices move, which makes projections uncertain. A heat pump can lower heating cost compared with oil, propane, or electric resistance in many homes, though the result depends on your house and your electric rates. See our comparison of heat pumps and furnaces in Massachusetts.
Also consider the cost of not replacing. A failing system that needs repeated repairs, wastes fuel, or breaks down in January has costs too. Our guide on when to replace a furnace or boiler can help you weigh them.
Rebates, incentives, and financing
Programs such as Mass Save may offer incentives for qualifying heat pumps, insulation, and other efficiency upgrades, and in some cases financing. Federal tax credits for certain efficient equipment have also existed, with rules that change. We do not quote amounts because terms and eligibility change, and some require pre-approval or a specific process. Always confirm current rules on the official program sites before you sign a contract. Our Mass Save guide explains where to start.
How to compare bids fairly
Two quotes can be very different on paper and very similar in value, or the other way around. Compare them line by line.
What to compare between quotes
- Is the equipment size based on a calculation of your house?
- Are the models, efficiency ratings, and staging written out?
- Is duct inspection or modification included or excluded?
- Who handles permits and electrical work?
- What does the warranty cover, for how long, and on parts or labor?
- What is included for removal, drains, venting, and thermostats?
- What is the payment schedule?
- How long has the company been in business, and what is its reputation?
A lower price that omits the load calculation, the duct check, or proper commissioning is not a bargain. See our guide on how to choose an HVAC contractor on the South Shore.
Ways to manage the cost
- Plan before the emergency. A replacement planned in spring or early fall is calmer and easier to compare than one done at 2 a.m. in January.
- Fix air sealing and insulation first when it makes sense. A tighter house needs a smaller system.
- Consider a staged project. For example, heat pump mini-splits in the rooms you use most, with an existing boiler staying as backup.
- Maintain what you have. A yearly tune-up extends life.
- Ask about incentives and financing early.
To get an actual number, call or text (781) 353-8852 or request a free estimate. You will get a written quote, an explanation, and no pressure.
Questions homeowners ask
Why is there such a wide range in heating and cooling prices?
Because no two houses are alike. System type, size, ducts, access, and electrical needs all vary, and they change the cost a lot.
Is a more expensive system always better?
No. A system that is the right size, installed well, and matched to the house beats a bigger or more expensive one that is poorly installed.
Do prices go up in winter?
Demand rises in the first cold snap and the first heat wave, which can affect scheduling and sometimes pricing. Planning ahead gives you more options.
Is financing available?
Programs such as Mass Save may offer financing on qualifying upgrades. Confirm current terms on the official site, and ask us what you should have ready.
Can you give me a price over the phone?
We can talk through options and expectations. A real price needs a look at your house, and the estimate is free.
Related services
Sources and further reading
Written by the team at Home Heating and Cooling in Norwell, MA. We review our guides at least twice a year and update them when equipment, codes, or programs change. Last updated October 23, 2026.
