How much does it cost to upgrade the heating system in an old house?

Author: Laron Morar  |  Last update: Friday, June 27, 2025

For a standard-efficiency air conditioner and furnace with simple duct layout, you can expect an average HVAC installation cost of around $10,000–$15,000, based on market research by the This Old House team. However, if you own a larger home and want premium-efficiency equipment, total project costs can exceed $20,000.

How to update the heating system for an old house?

In most cases, heat pumps are the most efficient way to heat your older home. These super-powerful HVAC systems work by transferring heat from outside your home to the inside of your home and they also double as an air conditioning system in the warmer months—a win-win.

How much to add HVAC to an old house?

Central air conditioning systems are a sizable investment, typically ranging in price from nearly $3,800 to nearly $8,000. Key factors that determine what central AC will cost include the home size, the system's energy efficiency, ductwork and labor.

What is the $5000 rule for HVAC?

The $5,000 rule is an industry-accepted rule for determining whether to repair or replace an HVAC system. Multiply the age of your equipment by its estimated repair cost. If the outcome is under $5,000, you should probably repair it. If over $5,000, you should replace it.

How much does it cost to upgrade the heating system?

An HVAC replacement cost is $7,500 on average. This range could be as low as $5,000 or as high as $12,500, depending on the type and size of your unit, the brand, and labor costs. Your overall cost for a new HVAC unit could reach $22,000 if you add new ductwork and additional features like a HEPA filtration system.

How to Upgrade Baseboard Heating | This Old House

How much is a HVAC system for a 2000 sq ft house?

How much does a new HVAC system cost for a 2,000 sq. ft. home? The costs range from $6,224 to $11,434, depending on the system type and installation requirements. Key factors include system size, type, efficiency, and local labor rates.

Is it worth it to upgrade HVAC?

Upgrading your HVAC system can lead to significant savings in the long run. By enhancing air sealing and insulation, you can ensure that your home is better equipped to maintain a consistent temperature without overworking your HVAC system.

Should I replace a 20 year old AC unit?

On average, you can only expect about 15 years of reliable service from a central AC system. And that's only if you maintain your system well. So, if your home has an AC that's 20 years old or older, it's likely living on borrowed time. Here are all the reasons to replace your home's 20-year-old air conditioner.

Does new HVAC qualify for tax credit?

The Inflation Reduction Act (IRA), effective through 2032, offers annual tax credits up to $2,000 for ENERGY STAR-certified heat pumps and other high-efficiency HVAC systems. This recurring credit can be claimed each year that eligible improvements are made.

How much does a full HVAC system cost?

Generally, the average cost to replace an HVAC system can run anywhere from $5,000 to $15,000 depending on the customers' needs. We know that putting that much money down on anything can be daunting, but for a system as crucial as an HVAC unit, you can never be too safe.

Does homeowners insurance cover HVAC?

Homeowners insurance covers HVAC systems when the damage is a result of a covered disaster or peril, including high winds, fallen trees, theft, hail or even a fire. So if lightning strikes your unit and damages its electrical components, your homeowners insurance policy would probably cover it.

What time of year is the cheapest to replace HVAC?

Better pricing: Since there's less demand for HVAC system replacement in spring and fall, your HVAC contractor might even offer their own savings incentives.

How much is a furnace for a 1500 square-foot house?

Gas Furnace: $3,000 – $6,000. Electric Furnace: $2,500 – $5,000.

What is the best heating system for old houses?

As a replacement for old gas and oil boilers, pellet boilers are considered the best heating system for old buildings. Their great advantage is that they work with all conventional radiator systems and do not need to be replaced. In addition, pellet boilers have a significant cost advantage in terms of running costs.

How to update a 50 year old house?

How to Make an Old Home Feel New?
  1. Create Space in your Home. ...
  2. Renovate Your Bathroom. ...
  3. Install New Lighting in Your Home. ...
  4. Add New Door Handles to Renovate the Kitchen. ...
  5. Garden Landscaping. ...
  6. Replace Window Treatments. ...
  7. Insert Temporary Wallpaper. ...
  8. Smart Home System.

Why is my old house so hot?

Air leakage – if there are gaps and cracks in your home (under doors, around windows, through attic penetrations, around your foundation, etc.) warm air will leak into your home increasing the temperature, and potentially the humidity levels, in your home.

Can you write off HVAC replacement on taxes?

Federal Tax Credits

The Inflation Reduction Act (IRA) of 2022 makes tax credits available on high-efficiency HVAC units through 2032. It allows you to deduct 30 percent of the purchase and installation costs and caps the amount you can write off: Air conditioners, furnaces, boilers, and water heaters max out at $600.

What appliances are eligible for the Inflation Reduction Act?

The Inflation Reduction Act provides home appliance rebates for discounts on electric energy-efficient appliances like Induction cooktops, ranges and heat pump laundry appliances. Sign up to be notified when rebates are available in your state.

Can you write off home repairs on your taxes?

As an average homeowner, the answer is generally no as most remodeling projects completed at your personal residence can't be written off. However, there are certain cases that can qualify your bath remodel as tax deductible. One would be medically necessary changes.

Is it worth fixing a 20 year old furnace?

Repair: If your furnace system is less than 15 years old and the cost of repair is less than half the cost of replacement. Replace: If your furnace system is more than 15 years old and requires a costly repair to maintain efficiency.

Is it worth repairing a 10 year old air conditioner?

If your aircon is older than 10 years and plagued with ongoing issues, you might want to consider replacing your air conditioner. A benefit of replacing your aircon is that you will get a more energy efficient model which would ultimately save you a lot of money on power bills.

How long does it take to replace an old AC unit?

If you are installing a new central air system or replacing an old one. If you are changing out an older AC unit for a newer or similar one, the job will generally take one day, or eight hours – as long as the other components, like the ductwork, remain the same. This is what we call a changeout.

How do most people pay for new HVAC?

Many HVAC companies offer financing to their customers to streamline the HVAC replacement process and paying for it. Banks and credit unions may approve you for a personal loan, home equity line of credit, or a home improvement loan where loan proceeds are used specifically to make the upgrades your home demands.

What is the most expensive part in an HVAC unit?

Usually, it is a quick fix, but sometimes the failure can be caused by a much bigger problem. The most expensive part of an AC unit to replace and repair is the air compressor.

How much does it cost to upgrade HVAC system?

Overview: A typical full system HVAC replacement can range between $6,500-$15,000. Costs vary widely depending on various factors including the efficiency, type and size of the system you choose. Heating and air conditioning equipment is a big expense.

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