The cost of Trane furnaces varies widely with size, efficiency and features. All prices mentioned below are national average estimates (furnace unit and installation) as of 20242025.
The real prices may differ depending on where you live, what you need at home, and the prices of the installers. The tables are arranged in order of BTU capacity, furnace stage type and particular Trane models in order to make it clear.
Average Installed Cost by BTU Capacity
Heating capacity of furnace (BTUs) has a great influence on cost. The bigger BTU furnaces are more expensive because they have larger heat exchangers and produce more, which generally needs more materials and labor. Average total installed costs of common residential sizes are as indicated in the table below:
| Furnace Size | Average Installed Cost (National) |
|---|---|
| 60,000 BTU | ~$3,900 (average) |
| 70,000 BTU | ~$4,200 (average) |
| 80,000 BTU | ~$4,500 (average) |
| 90,000 BTU | ~$4,800 (average) |
| 100,000 BTU | ~$5,100 (average) |
Sources: These averages are based on national cost guides. As an example, a medium size 80k-90k BTU furnace in a moderate climate area will cost about 3,000-5,000 to install.
The smaller BTU units (e.g. 60k) will be on the low end of cost scales, and 100k BTU furnaces (larger homes or colder climates) will be on the high end.
Average Cost by Furnace Stage Type
Furnace “stage” refers to the burner operation modes:
- A one-stage furnace contains one level of heat output (on/off). It is the least expensive one.
- A two-stage furnace is a high and low fire furnace, which provides superior comfort with a moderate cost increment.
- A modulating furnace changes its output continuously, and is the most consistent in comfort and highest in efficiency, but the most expensive to purchase.
The higher the staging and the blower features (such as variable-speed fans), the higher the average costs. The table below is a breakdown of the average costs by type of stage:
| Stage Type | Avg. Equipment Cost | Avg. Installation Cost | Avg. Total Cost |
|---|---|---|---|
| Single-Stage | ~$2,500 | ~$1,500 | ~$4,000 |
| Two-Stage | ~$5,000 | ~$3,000 | ~$8,000 |
| Modulating (Variable) | ~$7,000 | ~$4,000 | ~$11,000 |
Single-stage furnaces are the cheapest (about 22K-4K installed), because they have simpler burners and blowers. Two-stage units are a few thousand dollars more, which is an indication of their improved components and efficiency.
Modulating furnaces are high-end systems, with an average installation cost of around 10K+ in exchange of optimal comfort and efficiency. The average is calculated based on the fact that labor is typically ~3550 percent of total cost.
Trane Furnace Model Price Comparison
The table below gives the average prices of the popular Trane furnace models. It contains the efficiency (AFUE) of each model, staging, and whether the model has a variable-speed blower and the national average costs of the equipment and installation:
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| Trane Furnace Model | AFUE | Stages | Var. Speed | Avg. Equipment | Avg. Installation | Avg. Total Cost |
|---|---|---|---|---|---|---|
| S8X1 – 80% Single-Stage | 80% | Single | No | ~$4,100 | ~$2,700 | ~$6,800 |
| S8B1 – 80% Single-Stage (Builder) | 80% | Single | No | ~$4,000 | ~$2,600 | ~$6,600 |
| S9X1 – 96% Single-Stage | 96% | Single | No | ~$4,800 | ~$3,200 | ~$8,000 |
| S9B1 – 92% Single-Stage (Builder) | 92% | Single | No | ~$4,600 | ~$3,000 | ~$7,600 |
| L9X1 – 95% Single-Stage Ultra-Low NOx | 95% | Single | No | ~$6,000 | ~$4,000 | ~$10,000 |
| S8X2 – 80% Two-Stage | 80% | Two | No | ~$5,100 | ~$3,400 | ~$8,500 |
| S9X2 – 96% Two-Stage | 96% | Two | No | ~$5,800 | ~$3,800 | ~$9,600 |
| XV80 – 80% Two-Stage Variable-Speed | 80% | Two | Yes | ~$4,800 | ~$3,200 | ~$8,000 |
| S9V2 – 96% Two-Stage Variable-Speed | 96% | Two | Yes | ~$6,450 | ~$4,300 | ~$10,750 |
| XC95m – 97% Modulating Var. Speed | 97% | Modulating | Yes | ~$6,600 | ~$4,400 | ~$11,000 |
| S8V2-C – 80% Two-Stage Variable-Speed | 80% | Two | Yes | ~$4,950 | ~$3,300 | ~$8,250 |
| S9V2-VS – 97% Two-Stage Variable-Speed | 97% | Two | Yes | ~$6,600 | ~$4,400 | ~$11,000 |
Model notes: The least expensive models are the single-stage furnaces in Trane Choice series (S8X1, S8B1, S9X1, S9B1) with national installed costs averaging in the $6K-$8K range. The ultra-low NOx L9X1 (95% AFUE) is in the upper price range of single stage units (approximately 10K installed).
Two-stage models are also different, an 80 percent two-stage such as the S8X2 or XV80 will run approximately 8K-9K installed, and a high efficiency two-stage (96 percent AFUE) such as the S9X2 will run approximately 9K-10K installed.
High-quality variable-speed furnaces are more expensive. As an example, Trane S9V2 (96% AFUE, two-stage, variable-speed) costs about 10-11K on average.
The high-end Trane XC95m (97% AFUE, modulating) is also priced about the same, with an average cost of $11K or higher installed. The efficiency and comfort control of these high-end models is better and this is what makes them expensive.
Main takeaway: Single-stage Trane furnaces are a good choice when it comes to heating reliability at the lowest possible price, whereas two-stage and modulating models are more comfortable and efficient but cost more upfront.
At the national level, replacing a simple single-stage furnace with a variable-speed modulating furnace can increase the overall cost of the installation by a factor of two to three, but could provide long-term energy cost and comfort advantages. All prices quoted above are national averages; quotes can vary depending on the installer, complexity of the home and regional prices.
How to Get the Best HVAC Prices
- Firstly, keep in mind that installation quality is always the most important thing for residential HVAC project. So never sacrifice contractor quality for a lower price.
- Secondly, remember to look up the latest rebates as we talked above.
- Thirdly, ask for at least 3 bids before you make the decision. You can click here to get 3 free estimates from your local contractors, and this estimate already takes rebates and tax credit into consideration and filter unqualified contractors automatically.
Lastly, once you chose the right contractor, remember to use the tactics from this guide: Homeowners Tactics When Negotiating with HVAC Dealer to get the final best price.
