Heat Pumps
Buying a New Furnace? Here’s What You Need to Know
By HVAC.com•March 25, 2025
Buying a new furnace is a big decision, and with so many options available, it’s important to know what to look for. Factors like fuel type, efficiency ratings, cost, and warranty coverage all play a role in finding the right system for your home. In this guide, HVAC.com walks you through the key things to consider when purchasing a new furnace.
Oil, Natural Gas, and Electric Furnaces
When choosing a furnace, it’s important to consider the differences between oil, natural gas, and electric models. Oil furnaces generate heat using oil and are often more affordable upfront while delivering high heat output per BTU. However, they tend to be less efficient and come with higher fuel costs.
Gas furnaces, fueled by natural gas or propane, are the most common choice for homeowners due to their balance of affordability, energy efficiency, and widespread availability. They offer lower long-term fuel costs and reliable performance, though they typically have a higher initial price.
Electric furnaces, on the other hand, are the most efficient in terms of energy conversion, require less maintenance, and have no emissions. However, they can be more expensive to operate depending on electricity costs in your area. Understanding the pros and cons of each type can help you make the best choice for your home and budget.
Single-Stage vs. Two-Stage vs. Variable-Speed Heating
Single-stage furnaces operate with a fixed gas valve and a one-speed motor, providing a single heat setting. These systems are less expensive but may cause temperature fluctuations. Two-stage heating uses a two-stage gas valve and a variable-speed motor, offering multiple heat settings for improved comfort and efficiency. This allows the furnace to run at a lower setting during mild weather and ramp up during colder temperatures.
For even greater efficiency and comfort, consider a variable-speed furnace. Unlike single-stage or two-stage furnaces, variable-speed models continuously adjust their airflow to maintain consistent indoor temperatures. This not only enhances comfort but also reduces energy consumption and noise levels. Variable-speed furnaces tend to have higher upfront costs, but they can significantly lower your heating bills over time.
Energy-Efficiency Ratings
Modern furnaces are designed to be more energy efficient, reducing both environmental impact and utility costs. The efficiency of a furnace is measured by its Annual Fuel Utilization Efficiency (AFUE) rating, which indicates the percentage of fuel converted into usable heat. For example:
- Standard efficiency furnaces have AFUE ratings of 80%-85%.
- High-efficiency furnaces, often ENERGY STAR® certified, have ratings of 90%-98.6%.
While high-efficiency furnaces cost more upfront, they can save homeowners money in the long run by lowering heating expenses.
Cost of a New Furnace
The total cost of a new furnace depends on several factors, including the brand, efficiency, size, and installation costs. On average, a new gas furnace costs between $3,000 and $10,00, including installation.
High-efficiency models and variable-speed furnaces tend to be on the higher end of this range. Keep in mind that installation costs can vary based on your home’s size, ductwork condition, and location.
Warranty Considerations
Furnace warranties typically last between 5 to 10 years, though some manufacturers offer extended coverage on heat exchangers. These warranties generally cover defects in materials and workmanship, with some including parts and limited labor costs, while extended warranties may offer more comprehensive protection.
To ensure full coverage, homeowners usually need to register their furnace within a certain timeframe after installation. Additionally, warranties are often non-transferable, meaning they apply only to the original homeowner.
Advanced Features to Look For
Many modern furnaces include advanced features to enhance comfort, efficiency, and air quality, such as:
- Variable-speed motors: Adjust airflow to maintain consistent temperatures and reduce energy use.
- Smart thermostats compatibility: Allow homeowners to control temperature remotely for better efficiency.
- Air filtration systems: Help reduce allergens and dust in the home.
Choosing a Furnace Brand
When buying a new furnace, brand reputation plays a key role in ensuring long-term performance and efficiency. Some brands are known for their durability and high-efficiency models, making them ideal for homeowners looking for reliable, long-lasting heating solutions. Others focus on advanced technology, offering premium efficiency ratings and smart home compatibility for those seeking cutting-edge features.
For budget-conscious buyers, there are brands that prioritize affordability while still providing solid warranties and dependable performance. Meanwhile, some manufacturers strike a balance between cost and efficiency, offering mid-range models that deliver reliable heating without the premium price tag.
Customer Reviews
Before making a final decision, reading customer reviews can provide valuable insights into furnace performance, reliability, and maintenance needs. Look for reviews from homeowners in similar climates and home sizes to understand how well a particular furnace model performs under real-world conditions.
By considering factors like fuel type, efficiency, cost, and brand reputation, you can choose a top-rated furnace that keeps your home warm and energy-efficient for years to come.