Pool heater clearance question

[mikemurph6]

I’m looking to have a new heater installed, raypak rp2100, 336k BTU. I have existing gas hook ups and electricity in my pool shed from the last heater. The new heater calls for clearance from combustible construction to be 30 inches from the top of the vent terminal, the manual specs also indicate that the height of the top of the indoor draft hood will be 63 inches high. That means that the roof of the shed must be at least 93 inches high, I believe. The pool shed does not have 8 foot ceilings...

The pool shed has a slanted wood framed roof above the heater, on one side of the heater the height of the ceiling and the frame is about 90 inches from the floor, at the other side of the heater the height of the ceiling is about 80 inches. I was thinking about lining the ceiling with metal as a safety measure, is this a good solution or not enough to make the heater safe?

 

[sktn77a]

Can't speak to the manufacturers specs other than to say I've seen plenty of indoor heaters with a similar clearance to the roof as yours. Do you have any helpful local codes?

Just to be clear, is the vent pipe B-vent (double wall)?

 

[mikemurph6]

Thank you for the help. Yeah it is double wall vent pipe

 

[blazer58]

I think you also need min of 5' of B-Vent from top of draft hood to bottom of vent cap.

I just installed a 406 Raypack and have pretty much same clearance's as yours.
We ran thru the peek of the roof, and and used 2 90's to get the pipe run requirement.
The opening for the B-vent is larger than the pipe, and the flashing is metal that the B-vent goes thru
Had a havc do the install (my brother) and we are a little short on some of the clearances, but he did not think it would be a problem