Heat Pump Installation Cost in Seattle, WA
Lennox 5-Ton 21 SEER

The average cost of heat pump installation in Seattle, WA with a Lennox 5.0-ton 21 SEER system is $8,680, with most homeowners paying between $8,180 and $9,180 depending on home conditions, permit fees, and labor availability. The Lennox 5.0-ton unit is a premium, energy-efficient unit engineered for long-term reliability, sized for homes with 2,100-2,700 sq ft of conditioned space. At 21 SEER, this unit qualifies for federal energy tax credits and delivers exceptional long-term savings.

Cost Breakdown - Seattle, WA

* Estimates based on Seattle area labor rates ($148.8-$241.54/hr, BLS-sourced). Actual costs vary by home conditions and contractor. Get 3 quotes.

About Heat Pump Installation

Installation of a new heat pump providing both heating and cooling. More efficient than traditional HVAC in moderate climates. In Seattle, WA, licensed HVAC contractors typically charge $149–$242 per hour for installation labor, with this job averaging 10 hours.

The equipment cost for the Lennox 5.0-ton 21 SEER system represents approximately $5,550 of your total. Installation labor in Seattle adds $1,960, with permit fees, refrigerant, and disposal bringing the full estimate to $8,680. Prices in WA vary by contractor — always collect 3 quotes before scheduling a major HVAC installation.

Signs You Need Heat Pump Installation

Consider scheduling heat pump installation in Seattle, WA if you notice replacing aging split system or want one unit for heating and cooling or high energy bills with current system. Early action prevents the costly emergency service premiums common in the West region during peak seasons.

• -Replacing aging split system
• -Want one unit for heating and cooling
• -High energy bills with current system
• -Home in a moderate climate zone

What's Included

• -Outdoor heat pump unit installation
• -Indoor air handler
• -Refrigerant line set installation
• -Electrical connections
• -Heat pump compatible thermostat
• -Full system commissioning and testing

Hiring an HVAC Contractor in Seattle

• 1.Verify the contractor holds a current WA HVAC license and carries liability insurance.
• 2.Request an itemized quote that separates equipment, labor, and permit costs.
• 3.Ask specifically about Lennox dealer status — authorized dealers in Seattle, WA often offer extended warranties.
• 4.Confirm the quote includes refrigerant, line set, and startup commissioning — not just the equipment.
• 5.Check for manufacturer rebates and utility company incentives before signing.

Frequently Asked Questions