The best furnace for your home depends on your budget, climate, and how long you plan to stay in the house. For cost-effective reliability, brands like Goodman or Amana are excellent. For premium, long-term performance and high efficiency, consider Trane or Lennox.
The "$5,000 rule" is a quick, rough guideline to help homeowners decide whether to repair an aging furnace or replace it entirely. It helps you determine if pouring money into an old system is a waste of cash, or if it still has plenty of life left.
“Homeowners should consider their budget, the size of the unit, the unit's efficiency, the number of stages of the furnace, and the brand reliability when picking out a furnace for their home,” Dickson said.
A 60,000 BTU furnace typically heats homes ranging from 1,200 to 2,000 square feet. However, the exact size depends heavily on your local climate, insulation levels, and window efficiency.
Yes, furnace prices are definitively going up in 2026. Homeowners and contractors are seeing ongoing HVAC equipment increases, with manufacturers like Lennox, Goodman, Daikin, and Amana pushing through price hikes ranging from 2% to 10%.
Federal tax credits for residential furnaces and HVAC systems expired at the end of 2025. If your furnace was installed and placed in service in 2026, it no longer qualifies for the Section 25C Energy Efficient Home Improvement Credit.
The average lifespan of a home furnace is 15 to 20 years, though well-maintained units can last up to 30 years. Gas furnaces typically last 15–20 years, while electric furnaces may last up to 30 years. Experts generally recommend starting to plan for a replacement when your unit is 15 years old.
For long-term reliability, Trane and Rheem generally stand out as the top furnace brands. Trane is celebrated for its heavy-duty, durable build, while Rheem is highly praised by HVAC technicians for its simple, easy-to-service design and long-lasting performance.
A 45,000 BTU furnace can typically heat between 1,000 and 1,500 square feet. The exact coverage depends heavily on your local climate, ceiling height, and how well your home is insulated.
The best months to buy a furnace are May (late spring) or September (early fall). During these off-season months, heating demand is low, making it easier to negotiate discounted prices, avoid emergency premiums, and secure flexible installation schedules.
Industry experts and consumer ratings consistently highlight Trane, Carrier, and Lennox as the top three furnace brands. Each excels in a specific category:
When purchasing a new furnace, focus on getting an accurate quote, maximizing your energy savings, and ensuring a proper installation. Ask contractors these key questions:
ENERGY STAR certified oil furnaces that use certain fuels are eligible. The equipment must be rated by the manufacturer for use with fuel blends at least 20 percent of the volume of which consists of biodiesel, renewable diesel, or second-generation biofuel.
How Do I Claim a New Furnace on My Taxes? As a homeowner, you can claim a credit on your energy-efficient furnace by filling out Form 1040 (or 1040NR for non-resident aliens). To determine your credit amount, complete the Residential Energy Credits Form 5695.
The 2-foot rule (or 24-inch rule) in HVAC dictates that branch duct "take-offs" should be spaced at least 24 inches apart from one another, turns, or end caps. This distance gives turbulent air enough room to settle and re-pressurize, ensuring consistent and even airflow to every room.
The most expensive thing to fix on a furnace is the heat exchanger. Replacing it typically costs between $𝟏,𝟎𝟎𝟎 and $𝟑,𝟓𝟎𝟎, primarily because it is a highly labor-intensive job that involves virtually dismantling the entire unit.
The average cost to replace a furnace is between $4,000 and $8,000, including both the unit and professional installation. Your exact price will largely depend on the size of your home, the type of fuel, and the unit's energy efficiency, with basic models starting around $3,000 and premium, high-efficiency systems reaching up to $12,000.
At 10 years old, your furnace is likely just entering the second half of its lifespan, as most well-maintained units last 15 to 20 years. Fixing it is almost always worth it if the repair is minor, the part is under warranty, and you haven't had a history of frequent breakdowns.
Have HVAC Prices Gone Up in 2026? Yes HVAC prices have steadily increased over the past few years, and 2026 is no exception. These increases are affecting everything from entry-level systems to high-efficiency units, making it more expensive than ever to install or replace HVAC systems.
A 60,000 BTU furnace typically heats a home between 1,200 and 2,000 square feet. However, the exact fit depends heavily on your local climate, ceiling height, and how well-insulated your home is.
At 25 years old, a furnace is in the final stretch of its lifespan, which typically maxes out between 15 and 20 years. While it can still be functional, it is running on borrowed time, operating at a lower efficiency than modern units, and poses an increased risk of sudden breakdown or a cracked heat exchanger.
The average lifespan of a furnace is 15 to 20 years. However, this timeframe depends on the type of system you have and how well it is maintained.
A 95% AFUE (Annual Fuel Utilization Efficiency) furnace is generally worth the extra money if you live in a cold climate and plan to stay in your home for at least 4 to 7 years. It offers long-term gas savings, enhanced comfort features, and often qualifies for utility rebates.
Carrier and Rheem are both premier HVAC brands, but they cater to slightly different needs. Carrier leads the industry in premium, ultra-high efficiency and advanced communicating technology. Rheem is celebrated for offering a better balance of day-to-day value, long-term reliability, and easier-to-source replacement parts.
For example, the Lennox SLP98V Variable-Capacity Gas Furnace is at least 50 percent quieter than competitor's furnaces, making the SLP98V gas furnace the quietest furnace you can buy1. SilentComfort™ is achieved by utilizing variable-speed technology.