The Navajo Heater Kits are approved for use in Piper PA-31-310/325/350 aircraft.

These Kits are currently installed in over 100 aircraft throughout the US and Canada. We have kits operating as far north as Alaska and the Northwest Territories with excellent results. Our product uses the proven KISS (Keep It Simple) Theory by utilizing heat off the exhaust to provide cabin heat. Therefore, as long as the engine is running you have heat. The Janitrol heater can be removed or kept for ground heating. Our system does not utilize any of the existing heater components except for the ducting.

A modification Kit (one per engine) consists of:

• Two heat exchangers - which are substituted for the first exhaust segments aft of the last cylinder on each bank of cylinders.
• Two intake scoops (1" high) Mounted on to the top of the cowl for ram air to the heat exchangers.
• One heat control box to the firewall for airflow control and shutoff capabilities.
• Ducting, (all double-wall SCEET tubing) which is routed from the firewall through the nacelle area and wheel well into the cabin. It enters the cabin just aft of the first seat in the respective side of installation.
• Four small aluminum doublers to be riveted in the wheel well area.
• A push-pull heater control which is mounted under the pilots side of the instrument panel.

Also included are the installation drawings, hole saw and all related hardware. The heat exchangers and control box are all stainless steel and the ducting material is capable of withstanding temperatures up to 600 degrees F. The approximate installation time for the first kit is 40 hours.