Improved Cabin Heat for our Cessna 172 PFS-13204 kits

Keeping in accordance with our pursuit of innovating and finding ways to improve we are excited to announce a design improvement that will increase the cabin heat for our Cessna 172 and 175 second generation exhaust systems (our p/n, PFS-13204). In our original design from 2003, the cool air would enter the front left of the shroud, pass over the internal collector pipes that heat the air, then exit to the cabin on the back left side of the shroud. Unfortunately, this was almost a direct straight-through pathway. The Cabin heat SCAT hose connection would then come out of the left side and have to snake its way back to the far right side firewall where the cabin heat mixing valve is located. For most customers, the heat output of the Power Flow was considered to be acceptable, but some flying in extreme cold told us that they wanted an improvement.

In our new design, we have made a vast improvement by changing the location of the cabin heat output and forcing the air to take a different path through the collector assembly which acts as a giant radiator. This forces the air to remain inside the shrouded collector area for longer and greatly improves the heat inside the aircraft's cabin. The new design’s output is a 2.0 inch tube that is on the right side of the engine. 2.0 inch SCAT tube, clamps and an adapter to go from 2.0 to 3.0 inches are provided so that the SCAT can travel back in a more direct path to the cabin heat mixing valve on the right side of the firewall.

Our ground testing showed we increased the heat output by 42% over the original Power Flow Systems design and a 27% improvement on the stock Cessna exhaust.

There is typically a lead time for these parts, so please let us know what time table you are working with in the comments. If AOG Rush, please let us know and we may be able to accommodate.

The Improved C172 Cabin Heat Kit ships with all the necessary parts and hardware required for the upgrade.

Included in the kit:

• New upgraded PFS-51724 Shroud sub assembly(1)
• 6583 Reducer 3in to 2in(1)
• 6704 Air dam(1)
• 12 inches of SCAT-8(1)
• #8 Stainless screws(22)
• Tinnerman clips(22)
• 1 9/16 - 2 1/2 hose clamps(2)

For a complete description of this new shroud, please see our YouTube video by clicking here.

Note: Power Flow Systems Cessna 172/175 kits have been shipping with the upgraded cabin heat since March 2020.