Through wall direct vent clearance to deck.

[greyboy39]

This seems too close to me, cant find anything definitive about being next to a deck or combustibles. I know it's AMI but don't know the manufacturer. Whats the typical clearance requirement?

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[Jim Katen]

The manufacturer's installation instructions will list a clearance to an inside corner, which will be either 6" or 12" depending on the type of cap used.

You've got neither there.

[Hearthman]

Look inside the fireplace for the rating plate. If you cannot find a rating plate noting the mfr., model and serial number then treat it as an unlisted appliance which must be removed. Otherwise, defer to a qualified hearth pro. The stated clearances vary by unit to unit and not just mfr. to mfr. so you can NEVER assume or try to apply general measurements. One may be shorter and another may be longer--you have to read the listed installation instructions-period.

I can tell you that functionally, if direct vent terminations don't have sufficient free circulation of air, they often operate sporadically. I've investigated many units that met the listed instructions for clearances but due to local effect of air currents and eddies, the thing just didn't run right or suffered outages, sooting, etc.

HTH

[Hearthman]

BTW, this appears to be a Majestic termination. They have been bought out numerous times over the last several years but now are owned by their old nemesis, Hearth & Home Technologies, Inc.