Understanding the Difference: 92 vs 95 Efficiency Furnaces
When it comes to choosing a new furnace for your home, one of the key factors to consider is its efficiency rating. Two common options you might come across are 92% and 95% efficiency furnaces. But what exactly does this mean, and how do they differ? Let's dive into the details to help you make an informed decision.
Understanding Furnace Efficiency
Furnace efficiency is measured by the Annual Fuel Utilization Efficiency (AFUE) rating. This number represents the percentage of fuel that's converted to heat, with the rest lost up the chimney. For instance, a 92% AFUE furnace converts 92% of its fuel to heat, while a 95% AFUE furnace converts 95%.
92% Efficiency Furnaces
92% efficiency furnaces are a popular choice due to their affordability and reliability. They are typically powered by natural gas and use a single heat exchanger. Here's what you need to know:

- Cost: They are less expensive to purchase and install.
- Efficiency: They are less efficient, meaning they waste more fuel and may cost more to run in the long term.
- Warranty: Many come with a 20-year warranty on the heat exchanger.
95% Efficiency Furnaces
95% efficiency furnaces, also known as condensing furnaces, are a step up in efficiency. They use a second heat exchanger to capture and reuse more of the heat that would otherwise be lost. Here's what sets them apart:
- Cost: They are more expensive to purchase and install.
- Efficiency: They are more efficient, saving you money on energy bills in the long run.
- Warranty: Many come with a lifetime warranty on the heat exchanger.
Comparing the Two: A Side-by-Side Comparison
| 92% Efficiency Furnace | 95% Efficiency Furnace | |
|---|---|---|
| Purchase Cost | Lower | Higher |
| Operating Cost | Higher | Lower |
| Efficiency | Lower (92% AFUE) | Higher (95% AFUE) |
| Warranty | Typically 20 years | Lifetime on heat exchanger |
Which is Right for You?
The choice between a 92% and 95% efficiency furnace depends on your specific needs and budget. If you prioritize upfront cost and reliability, a 92% efficiency furnace might be your best bet. However, if you're looking to save money on energy bills in the long run and don't mind a higher upfront cost, a 95% efficiency furnace could be the way to go.
It's also worth considering the potential for rebates or tax incentives for purchasing a high-efficiency furnace. Be sure to do your research or consult with a professional to make the best decision for your home.
