Pic 1 is my plan for getting the air into the radiator box. I ended up going to a rubber and hose outlet with my half made parts in hand and I just bought a few big PVC pipes to see what might work.

I used the plastic pipes as a form or mold to produce my own inlet fittings. You see one of them in Pic 1 on the left. These end up being floxed to the main heater body as my ‘fittings’ The hoses fit together and make a seal yet are also easy to get apart. Perfect.

Pic 2 is where I have sealed up the ends in separate layups with Pic 3 giving an idea of how I’ve treated the ends. Its fun and fiddly work.

You might notice a nut and bolt too. I found two spots on the Heater that were perfect to drill through for fasteners.

Inlet plan

Sealing the ends

In-Out close up