venting out side wall of straw bale house

CPHNed

I have a customer who needs boiler replaced soon. its cast iron, b-vent through the roof.

Id like to propose mod/con. existing vent is only 5" double wall.

Anyone have experience drilling through side wall of straw bale house? Is it up to code, does it need to be lined with larger pipe? etc…thx

pecmsg

I ASSUME the same clearances to combustibles applies.
I would ask the Authority having Jurisdiction just to be safe.

EdTheHeaterMan

A 3" PVC vent vertical thru the roof using the B-vent as a sleeve will also work. You can use the space between the PVC and the B-vent as the air inlet. There WAS a kit that Weil McLain used to sell for this purpose Part Number 382-200-435 no longer sold.

But you can make one out of regular parts that you can get from the local supplier

This place may still have one in stock.

https://ebirdsall.com/default/weil-mclain-382-200-435-through-roof-vent-kit-for-weil-mclain-gv-cgs-boiler.html

hot_rod

I would much prefer a roof vent option, as Ed suggested. Unless multiple appliances are vented into the B-vent?

CentroTherm and others have liners for B-vent to mod con conversions.

Larry Weingarten

Hi, Might be good to ask here. https://permies.com/f/73/straw-bale-house 🤠

Yours, Larry

CPHNed

thx all, mucho appreciato:))