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

Author: Hans Hamill  |  Last update: Wednesday, October 29, 2025

The cost of a furnace for a 1,500 square foot house typically ranges from $2,500 to $6,500, including both the unit and installation. The exact price depends on factors such as the furnace's efficiency, brand, and whether additional work (like ductwork or permits) is required.

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

Furnace Size

However, you may need a larger unit if you live in a region with extremely cold winters. Typically, a 40,000 to 60,000 BTU furnace suitable for a 700 to 1,500 square foot home will cost between $2,000 and $3,000. For larger homes of up to 5,000 square feet, the cost may rise to around $6,500.

Is it worth replacing a 20 year old furnace?

Older furnaces need annual check ups. Main thing is the heat exchanger getting a crack, which could lead to fire or carbon monoxide poisioning. 20 years is a good time to start considering a new one but not essential, if the tech that comes to clean the burners sees an issue they will point it out to you.

What size furnace do I need for a 1500 square-foot house?

A 1,500-square-foot home will require between 45,000 to 90,000 BTUs.

Is it cheaper to replace AC and furnace together?

The cost of a new HVAC system together costs $7,500 on average, usually somewhere between $5,000 to $12,500. This can end up being cheaper than replacing your AC and Furnace separately over time. The cost to replace a furnace and air conditioning at once is $7,500 on average but could range from $2,500 to $15,000.

What size furnace do I need for a 1500 square foot house?

How much should I expect to pay for a new furnace and air conditioner?

You can typically expect to pay between $5,000 and $15,000 for a new furnace and AC system in your home. Units with higher efficiency may have a higher initial cost but can result in significant savings on energy bills over time.

Can I replace just the furnace without replacing AC?

The air conditioner and furnace are separate components of the HVAC system, so they can be replaced independently.

What is the most reliable gas furnace brand?

The 5 Best Furnace Brands
  • Carrier Furnace: Best Warranty.
  • Lennox Furnace: Best Company Reputation.
  • Bryant Furnace: Best for Durability.
  • Trane Furnace: Most Years of Experience.
  • Amana Furnace: Best for Efficiency.

Is it better to oversize or undersize a furnace?

Even a slightly undersized furnace will accomplish the job the majority of the time. Taking things down a few sizes will more than likely solve some of your common heating problems like too high of a utility bill while half of your house is blazing and the other half is an icebox.

What time of year is cheapest to replace furnace?

For people taking a proactive approach, doing a furnace replacement during the “shoulder seasons” of spring and autumn may offer lower prices, shorter lead times, and a better selection of products and service appointment availability.

Why is replacing a furnace so expensive?

Installation Entails More than Just the Furnace

For a gas-powered furnace, a contractor must set up a gas connection and vent. Installing an electric furnace requires running wiring, adding a circuit breaker, or perhaps updating an electrical panel. Holes are often drilled for pipes and wires.

What is the average life of a furnace?

How long does a traditional furnace last? An average furnace is designed to operate for 15 to 30 years in a home. The easiest way to increase the life cycle of your furnace is to hire a certified technician to perform maintenance and repairs once a year.

Does homeowners insurance cover furnaces?

Your base homeowners policy will cover many types of damage to your furnace. An extra endorsement known as Equipment Breakdown Coverage (EBC) will give you additional coverage for certain types of mechanical or electrical failure.

How long does it take to install a new furnace?

If you're worried about not having heat while the installation is in progress, the good news is that most replacements won't take more than a day. On average, home heating companies can complete the installation in about four to eight hours, depending on the size of your house.

What is the most expensive part of a furnace to replace?

Identifying the Priciest Component: The Heat Exchanger

Due to its complex role, a failure or crack in the heat exchanger can lead to serious issues, including dangerous carbon monoxide leaks. This makes furnace repair essential to maintain safety and functionality.

Can you put too big of a furnace in a house?

Bigger isn't better when it comes to your heating system! An oversized furnace causes excess wear and tear, higher energy bills, and more problems (and expenses!) that make it tough to stay warm in the winter.

Can I put a stronger blower in my furnace?

Can I put a bigger blower motor in my furnace so it will perform better? While upgrading blower motor sizes is possible, you might not need to install a replacement motor at all. Sometimes a simple repair is all you need to get your furnace fully functional again.

What is considered a high efficient furnace?

A high efficiency gas furnace has AFUE ratings of 90% or higher, up to a maximum of 98.5% AFUE. AFUE stands for Annual Fuel Utilization Efficiency, and is a measure of how much heat the furnace can pull from the fuel it consumes, ultimately determining how energy efficient a heating and cooling system is.

What brand of furnace is the quietest?

Top Quiet Furnace Brands
  • Trane. Trane is widely regarded as one of the top brands when it comes to quiet operation. ...
  • Carrier. Carrier is another leading furnace brand that prioritizes quiet operation. ...
  • Lennox. Lennox is known for its energy-efficient models, but it also excels in noise reduction. ...
  • Rheem. ...
  • Amana.

Which furnace lasts the longest?

A5: With proper care, electric furnaces can last around 20-30 years, while gas furnaces can last about 15-20 years on average.

Do you need to replace ductwork when replacing furnace?

You won't need to replace your ductwork if…

Your new furnace will likely have a higher efficiency rating than your old one (advances in technology have made furnaces more energy efficient in general) and include more features, but it can use the same ducts without any complications.

How much is a new furnace?

You should expect to spend between $3,800 and $12,00 on a new furnace, including both the unit and installation costs. Factors influencing the price include the type of furnace (gas, electric, or oil), the unit's efficiency rating, and the complexity of the installation.

What is considered old for a furnace?

If your furnace is over 20 years old, it might be time to consider a replacement, especially if you're experiencing issues like poor air quality, frequent repairs, or high energy bills.

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