Vertical vs Horizontal venting


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Old 12-03-22, 08:44 AM
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Vertical vs Horizontal venting

mr.heater big Maxx 50k. Its a small hanging unit heater. Says 3" category 1 for vertical venting or 4" category 3 for horizontal venting.

I can probably do with way. Side wall venting seems easier. Is it ok to vent thru the gable wall above the driveway/garage door?
 
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Old 12-03-22, 09:36 AM
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"Is it ok to vent thru the gable wall above the driveway/garage door?"
The installation instructions should tell you what is acceptable and what is not. Usually they will specify how much vertical you need before any horizontal sections and how long the horizontal may be.
 
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Old 12-03-22, 11:55 AM
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Yes, I'm seeing that when down loaded the installation manuals. I'm actually now looking at the modine hot dawg 30k. More size appropriate (single car attached) and if I get the HD-S model, it uses outside combustion air. That is a huge plus in my opinion.
 
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Old 12-03-22, 05:27 PM
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External combustion air is always better in my opinion. You've probably got a lot of gappage around the garage door but it really helps if the heater isn't actively sucking in combustion air through those gaps.
 
 

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