Lennox Launches Gas Furnace Featuring Integrated Refrigerant Detection System

Dual-fuel compatibility allows the furnace to pair with an electric heat pump and alternate fuel sources based on outdoor conditions.
Jan. 8, 2026
2 min read

Lennox Residential HVAC released the Dave Lennox Signature Collection SLP99VK Gas Furnace, a high-efficiency residential heating system with an integrated Refrigerant Detection System (RDS). The product is designed to support efficient operation while simplifying installation for HVACR contractors.

The SLP99VK Gas Furnace achieves an efficiency rating of up to 99%, converting nearly all input energy into usable heat. The integrated RDS is built into the furnace cabinet, eliminating the need for a separate refrigerant detection installation kit and helping reduce overall installation costs.

Key Features and Capabilities

  • Integrated Refrigerant Detection System (RDS): Factory-installed system removes the need for additional detection hardware during installation;

  • Up to 99% Efficiency: High-efficiency operation supports reduced energy consumption in residential heating applications;

  • Dual-Fuel Compatibility: Can be paired with an electric heat pump to alternate between fuel sources based on weather conditions;

  • Smart Thermostat Integration: Compatible with the Lennox S40 Smart Thermostat for system control, remote monitoring, and diagnostics; and

  • Indoor Air Quality Support: Designed to connect with the PureAir™ S Air Purification System and other Lennox filtration products.

The SLP99VK Gas Furnace is part of the Dave Lennox Signature Collection and is positioned among Lennox’s highest-efficiency residential heating products, supporting consistent temperature control and quiet operation.

The furnace is now available through Lennox dealers across North America.