Lennox 14T65 High Altitude Switch Kit for 7,501–10,000 ft Elevations

Description

The Lennox 14T65 is an OEM high altitude switch kit engineered specifically for Lennox heating systems installed at elevations between 7,501 and 10,000 feet above sea level. At higher altitudes, reduced air density affects combustion efficiency and pressure dynamics within a furnace. This switch kit compensates for those conditions, helping maintain proper system operation, safe ignition, and reliable performance in demanding high-altitude environments.

Key Features

• Designed for high-altitude installations ranging from 7,501 to 10,000 feet
• OEM Lennox replacement component for accurate fit and function
• Helps ensure proper combustion and pressure sensing at reduced air density
• Supports safe system operation in mountainous and elevated-terrain applications
• Direct replacement for compatible Lennox furnace models

Why High Altitude Kits Matter

At elevations above 7,500 feet, thinner air reduces the amount of oxygen available for combustion. Standard pressure switches and controls calibrated for sea-level operation may not function correctly under these conditions, potentially leading to nuisance lockouts or unsafe operation. The Lennox 14T65 switch kit is factory-calibrated for high-altitude conditions, providing the correct pressure setpoints to keep your Lennox system running safely and efficiently.

Application

• Compatible with select Lennox gas furnace models — consult your equipment documentation or Lennox parts lookup to confirm compatibility
• Ideal for residential and light commercial installations in high-altitude regions

Specifications

• SKU: 14T65
• Brand: Lennox
• Altitude Range: 7,501 – 10,000 ft
• Kit Type: High Altitude Switch Kit