Venting questions

[REKIII]

Hello my HVAC friends!

I recently installed a Rheem 90+ Furnace above my office in my shed, along with AC (Installed in conventional vertical, NOT horizontal. I have the AC and electric all hooked up (been running it over the summer. Today's chill reminded me that I had to finish hooking up the furnace.

I've vented plenty of Furnaces with PVC out the wall, however this furnace is standing upright, but I have to go up an out my steel roof with the pipes, not over and out.

First question....how should the pipes be configured, the instructions are vague at best.

Second, how do I flash on a steel roof? I'm used to installing the flashing on a shingle roof. Do I use a steel flashing like you would for plumbing.

Thanks for any help. Oh, the furnace is a R92P 98,000 BTU.

 

[Brian_WK]

Do a concentric vent kit if you have the room they look better are easier to seal around. make sure that it is high enough in the air that if you get snow pile up on the roof that it doesn't block the inlet (the bottom cone).

Someone else will have to answer about the roof flashing.

Brian

 

[brewchief]

I would also recommend a concentric termination, only one hole to deal with that way.

To flash it use a pipe boot like this http://www.bestmaterials.com/detail.aspx?ID=17276 may need a different size but that type of boot anyway, you will need sealant to go with it, duralink works great.

 

[REKIII]

Thanks! Those look great! I need to flash the water heater vent and the Plumbing vent, so those should work perfect. I appreciate it!