Lennox XP21 Heat Pumps

Lennox XP21 Heat Pump Overview

The Lennox XP21 is a two-stage heat pump with an efficiency rating of up to 19.2 SEER and 9.7 HSPF. It is part of the Dave Lennox Signature Collection and is an Energy Star Most Efficient 2016 product. The XP21 is solar ready and can be combined with solar roof modules in a SunSource Home Energy System. It can also be paired with a Signature Collection furnace to provide dual fuel efficiency. It uses iComfort technology, which allows the unit to share information with other system components and make adjustments for optimal efficiency. SilentComfort technology, which includes a SilentComfort fan grille and an insulated compressor compartment, helps keep sound levels as low as 67 decibels. The unit's cabinet is constructed of heavy-gauge galvanized steel with a baked-on powder finish and a zinc-coated steel base for protection against rust and corrosion.

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Consumer Reviews of Lennox XP21


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #1 of 17 Lennox Heat Pump
  • 100% of customers recommended

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Lennox XP21 Heat Pump Reviews

"XP21 is a great heat pump!"

5.0 rating
Very Satisfied

We live in Central Florida. Quite simply, we run the you know what out of heat pumps! Very few places in the country will compare with the high humidity and hot days we experience in a normal year. Even on a relatively cool winter day, after using heat in the overnight/morning, the sun will heat the house and roof until the A/C runs during the afternoon! Our hours of operation will beat or match any climate in the country. The Lennox XP21 two stage unit has been a trouble free dream come true. 15% to 19% average electricity savings with 90+ degree average June, July and August in the 20% to 22% range. We replaced a 3.5 ton Trane single stage, reliable but admittedly old and inefficient compared to today's equipment, with the 4.5 ton two stage Lennox. Completely trouble free so far, two years in and loving it!

D. V.

Winter Springs, FL

Other XP21 Reviews

There are several posts on sites such as hvac-talk.com from homeowners complaining that their XP21 doesn't heat efficiently when the weather gets cold. One of the homeowners also had icing issues with his unit and most professionals on the site suggested it may be a problem with the board or installer error.

XP21 Warranty

Product registration is required within 60 days of installation for maximum warranty coverage. The warranty for the Lennox XP21 heat pump is comprised of the following:

  • 10-year limited warranty on the compressor
  • 10-year limited warranty on covered components

An Extended Limited warranty and a Complete Care Plus Extended warranty, which covers parts and labor, are also available.

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