What is a Furnace Cost Estimator?
A furnace cost estimator is a budgeting tool designed to give you a reliable price range for a new furnace installation. By entering your home's size, your local climate, and your preferred fuel type and efficiency level, our free calculator provides an instant estimate for both the furnace unit and professional installation. This allows you to plan your budget, understand cost factors, and compare quotes from HVAC contractors with confidence.
Last updated: November 8, 2025
How to Use the Furnace Cost Estimator
Get a personalized estimate for your furnace replacement in just a few clicks:
- Enter Your Home Size: Input the total square footage of your home.
- Select Your Climate Zone: Choose the correct U.S. climate zone to help determine the required furnace size.
- Choose Furnace Type: Select the fuel source for your furnace (Gas, Electric, or Oil).
- Select Efficiency Level: Choose between a standard (80% AFUE) or high-efficiency (95%+) model.
- Click "Estimate Cost": Instantly receive your estimated cost range for a complete professional installation.
Understanding Your Furnace Cost Estimate
The total cost to replace a furnace is determined by several major factors. Our calculator uses these variables to generate your budget range.
- Unit Size (BTU): The furnace's heating capacity, measured in BTUs, is the primary driver of cost. We estimate the required size based on your home's square footage and climate zone. Colder climates need higher BTU furnaces.
- Fuel Type: The cost varies between gas, electric, and oil furnaces. Gas is generally the most common and balanced option.
- Efficiency (AFUE): A higher AFUE (Annual Fuel Utilization Efficiency) rating means the furnace wastes less fuel. High-efficiency units (95%+) cost more upfront but lead to lower monthly heating bills.
- Labor & Installation: A significant portion of the total cost (often 40-50%) is for professional labor, which includes removing the old unit, installing the new one, and ensuring it runs safely and efficiently.
According to the Department of Energy, heating accounts for nearly 45% of the average U.S. home's energy bill, making an efficient, properly-sized furnace a critical investment.
Example Furnace Cost Calculation
Here is a typical scenario for a mid-sized home in a cold climate (Zone 5).
| Input | Example Value |
|---|---|
| Home Size | 2,000 sq ft |
| Climate Zone | Zone 5 |
| Furnace Type | Gas |
| Efficiency | High (95%+ AFUE) |
| Estimated Installed Cost | $6,000 - $9,000 |