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Posted by ian on July 15, 2006, 10:42 am
DJ wrote:
> Just so's I understand. Bosch wants the vent 6' above what, exactly?
> The heater, or the ground... and yes, I'm asking you rather than taking
> the two minutes it would take to either check my own files or download
> the manual from Bosch ;-).
>
> If it's a rule, though, I'm thinking it's from Bosch, not the Code.
> I've installed a few propane direct vent appliances, and they go on and
> on about a MAXIMUM length of exhaust for non-power assisted vents, but
> not a minimum. Minimum distances from windows, doors, propane storage,
> all kinds of stuff like that, but not length of exhaust on the propane
> appliance.
> Might be that in a short exhaust, the incoming air doesn't have as much
> time to warm up from the exhaust portion of the pipe? This would
> degrade performance a bit.
Hi. I checked the installation instructions again and it states
''Minimum vent size must be 5". Minimum vent height must be 6 feet,
provided there are no elbows.'' It doesn't say what happens to the
vent height requirement if there *are* elbows, tho. I was thinking
about how chimneys work, and they do need to stay warm to draw well,
maybe that's what they're on about?
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