air filter adapter for condensing gas boiler

thingiverse

My chimney does not allow air intake for my gas boiler to be routed over the top of my roof so it has to pull air from the basement, as it is not clean and will not be in the near future, some kind of air filter will be beneficial to keep the internals clean.Adapter is made for two ar215 filter from filtron, it is a air filter from fiat 126p or more commonly known as very old fiat 500 with 0.6l engine.My boiler is wolf fbg-k 28.I also made version for single filter but after that i added second just to be safe.To make this, print one "main body" and one or two "filter pipe", those will have to be glued in place(i used two part epoxy) to make it airtight enough.After the glue sets just push the filters onto the "filter pipe"Print with supports and 100% infill.all of those were printed in pla, and i know that it touches hot exhaust pipe, but my boiler is a condensing boiler so the temperature never gets high enough to melt the plastic.outside diameter of the body that sits in the vent of the boiler is 100mm and diameter of exhaust pipe is 62mm, main body is designed to sit in between two parts of chimney pipe in a way that pipe rests on the main body sealing it off form air not pulled trough filters.i also had to cut off part of the outside of the chimney pipe (one with 100mm in diameter) as shown on photos where i left the jagged edge.