Direct vent clearance to outside corner

[MarlanC]

Hi, I am trying to determine a venting plan for multiple items on a wall with not much space... and I can't find any reference to needed clearance to an outside corner for a direct vent high efficiency furnace. I am in Seattle. The furnace is a Carrier 59MN7A. I looked through the install manual but didn't find a specific number. Can anyone help?

Thanks!

Marlan

 

[Reach4]

http://dms.hvacpartners.com/docs/1009/public/0f/59mn7a-08si.pdf page 46 has some pretty harsh wording on this.

Inside Corner Terminations Corner terminations for Direct Vent (2-pipe) terminations are permitted provided that: 1. The Direct Vent termination is located on the longer of the two walls. 2. The Direct Vent termination is located at a distance farther away from the inside corner than the length of the adjacent wall. 3. All other clearance requirements are met. See Fig. 41​

 

[Sponsor]

 

[MarlanC]

Thanks for the link. Hadn't seen that part about inside corners. However, it is an outside corner clearance I'm trying to determine. One of the notes on page 59 state: For clearances not specified in ANSI Z223.1/NFPA 54 or CAN/CSA B 149.1, clearances shall be in accordance with local installation codes and the requirements of the gas supplier and the manufacturer’s installation instructions.

Outside corner clearance is not specified by ANSI Z223.1/NFPA 54 and I certainly can't find it in the manufacturer's installation instructions. Seems like outside corner clearance would have been mentioned in that same section that inside corners was called if there was a manufacturer's requirement.

I don't find any reference to outside corner clearance in Seattle's fuel gas code (but I may just not have found it).

Wondering if this means there isn't a required clearance?

Thanks

 

[Terry]

I don't see outside corners being an issue for this. That would be the windest place on the structure.

 

[MarlanC]

Thanks much Terry. Looks like I have options on that outside corner which is great....