Standard HVAC Unit Sizes
Whether you are replacing an existing HVAC system or installing a new system, you may be wondering what HVAC unit size you will need. With many types of HVAC systems...
The Lennox SL25XPV heat pump is the flagship model in the Signature Collection, built for homeowners who want maximum efficiency, consistent comfort, and premium quiet operation. Its inverter-driven compressor allows it to fine-tune output in small increments, eliminating the temperature swings and energy waste of single-stage systems.
Cold-climate homeowners benefit from TruHeat™ Performance, which boosts heating capacity at low outdoor temperatures. Meanwhile, integration with Lennox’s iComfort® smart thermostats and PureAir™ filtration system ensures the SL25XPV heat pump fits seamlessly into connected, health-conscious homes. And with a 10-year limited warranty on parts and compressor, it offers long-term peace of mind.
| Feature | Specification |
|---|---|
| Efficiency | Up to 23 SEER2 / 10.3 HSPF2 (24 SEER / 11.8 HSPF in older ratings) |
| Compressor | Variable-capacity inverter |
| Sizes Available | 2 to 5 tons (024, 036, 048, 060 models) |
| Refrigerant | R-410A |
| Noise Reduction | As low as 55 dB outdoors |
| Heating Feature | TruHeat™ Performance for cold climates |
| Controls | Requires iComfort® thermostat + communicating indoor unit |
| Warranty | 10-year limited parts and compressor warranty (with registration) |
| Model | SEER2 / HSPF2 | Compressor Type | Noise & Comfort | Installed Cost | Best For |
|---|---|---|---|---|---|
| Lennox SL25XPV | Up to 23 / 10.3 | Variable-capacity inverter | Ultra-quiet, TruHeat™, precise control | $8,000 to $14,000+ | Maximum efficiency & comfort |
| Carrier Infinity 24 | Up to 22 / 10.5 | Variable-speed inverter | Quiet, smart diagnostics | $7,500 to $13,500 | High efficiency + sensors |
| Trane XV20i | Up to 21.5 / 10 | Variable-capacity | Very quiet, reliable | $7,000 to $13,000 | Durable premium option |
The SL25XPV typically ranges from $8,000 to $14,000+ installed, depending on tonnage, ductwork, and regional labor costs.
Though expensive, the SL25XPV’s energy savings and long-term durability often offset its upfront cost.
| Region | Estimated Installed Cost (SL25XPV) | Avg Annual Heating & Cooling Cost* | Estimated Annual Savings vs. Standard 14 to 16 SEER Heat Pump |
|---|---|---|---|
| South | $8,000 to $10,000 | ~$1,000 to $1,400 | $200 to $300 |
| Midwest | $8,500 to $12,000 | ~$1,200 to $1,600 | $250 to $400 |
| Northeast | $9,000 to $13,500 | ~$1,400 to $1,900 | $300 to $500 |
| West | $8,500 to $12,500 | ~$1,200 to $1,700 | $250 to $400 |
*Based on electricity rates for a 2,000 sq. ft. home in a typical climate zone. Actual costs vary with local utility rates, insulation, and heating/cooling demand.
If you upgrade from a standard 14 to 16 SEER heat pump to the SL25XPV (up to 23 SEER2), you could save $200 to $500 per year on heating and cooling bills, depending on your region.
In colder climates like the Northeast and Midwest, the SL25XPV’s TruHeat™ Performance ensures stronger winter heating output, making the payback especially strong. Over 15 to 20 years of operation, these annual savings add up to thousands of dollars — offsetting the higher upfront installation cost.
To maximize savings, it’s essential that the SL25XPV is properly sized (via Manual J calculation), ducts are sealed, and the system is installed by a Lennox-trained professional. Small inefficiencies elsewhere can diminish the benefits of a premium high-efficiency unit.
With regular maintenance, the Lennox SL25XPV heat pump can last 15 to 20 years or more. Annual professional inspections, frequent filter changes, and seasonal duct checks keep it running at peak efficiency. Its variable-capacity design reduces wear and tear, helping extend its service life compared to single-stage units.
Recommended care includes:
Its variable-capacity design reduces stress on components compared to single-stage systems, extending equipment life.
When homeowners research the best heat pump brands and decide on a premium system like the Lennox SL25XPV heat pump, they want clear answers about efficiency, cost, performance, and long-term value. To help guide your decision, we’ve compiled the most common questions about the Lennox SL25XPV heat pump — covering everything from energy ratings and operating noise to installation pricing, warranty coverage, and whether this model is worth the investment.
The Lennox SL25XPV heat pump achieves up to 23 SEER2 for cooling and 10.3 HSPF2 for heating, making it one of the most efficient systems on the market. This means lower utility bills and eligibility for many energy rebates.
Most homeowners pay $8,000 to $14,000+ installed for the SL25XPV. Actual costs vary by tonnage, ductwork needs, and labor rates, but incentives like tax credits and utility rebates can bring the net price down significantly.
Yes. With SilentComfort® technology and advanced insulation, the Lennox SL25XPV heat pump operates at sound levels as low as 55 dB, quieter than a normal conversation.
The Lennox SL25XPV heat pump includes a 10-year limited warranty on the compressor and parts, provided the unit is registered. This warranty reflects Lennox’s confidence in its durability.
For homeowners who want premium efficiency, quiet operation, and reliable cold-weather performance, the SL25XPV is worth the investment. Its higher upfront cost is balanced by lower energy bills, comfort improvements, and long-term reliability.
The Lennox SL25XPV heat pump is a premium choice for homeowners who demand the best in efficiency, quiet operation, and year-round comfort. While its upfront price is higher than mid-range options, its TruHeat™ cold-weather performance, smart integration, and warranty protection make it a strong long-term investment.
Looking beyond Lennox? The Modernize Review Hub gives you a clear look at HVAC brands and systems — including air conditioners, furnaces, boilers, and radiators — so you can compare options and make the right choice for your home.
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