Trane heat pumps cost between $2,500 and $5,000, as of 2015. The difference in heat pump prices depends on a number of variables including size, product category and model.
Trane heat pumps come in four different product categories based on efficiency: ultra efficiency, super efficiency, high efficiency and standard efficiency. Ultra-efficient models cost the most, and the standard efficiency models are the least expensive.
The Trane XL20i is an ultra-efficient heat pump that is available in four sizes: 2, 3, 4 and 5 tons. The 2-ton XL20i begins at around $3,500, and the 5-ton size can cost up to $4,600. The super-efficient XL15i averages around $3,200 for the 2-ton size, and the 5-ton size averages around $4,000.