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Old 10-07-2020, 03:31 PM   #1
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Closing up the louvre vent in the bedroom

Hi All,
I have a 2020 Mini lite 2506s, in the rear bedroom there is a wooden louvre opening. It has direct access to the outside if the outdoor kitchen door is open. Was thinking using some flexible screen material to stop flying insects or closing it off completely. Does the suburban heater need room air as a return? It also allows the rather noisy heater to be heard while sleeping. What do you all think, too risky or not an issue?
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Old 10-08-2020, 08:31 AM   #2
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that is your cold air return for the heater it need to be open
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Old 10-09-2020, 11:31 AM   #3
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Thank you, I kind of thought that it might me important, but no harm in asking first.. :-)
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Old 10-09-2020, 11:49 AM   #4
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X2 what SeaDog said. Looking through the louver you can see the furnace. If you block the louver your furnace will overheat without air coming out the heat registers and you could cause damage to the furnace.
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Old 10-09-2020, 08:58 PM   #5
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Yes and no

Quote:
Originally Posted by Scrapper View Post
X2 what SeaDog said. Looking through the louver you can see the furnace. If you block the louver your furnace will overheat without air coming out the heat registers and you could cause damage to the furnace.
The installation manual for the Suburban SF-series furnaces specifies the required area for the return air opening. For all but the largest ones, I believe it is 55 square inches of open, unrestricted area.

On our small SOB trailer the furnace was very noisy and there was no place to get away from it. But it had 110 square inches of return area. I figured that was enough area that it could withstand the restriction of those older-type filters that just contain plastic strands. The area was simply two cabinet faces covered with grilles. So I converted the cabinet faces into filter holders and set the filters flush with the cabinet face. The grilles mount over them.

So far so good. No evidence of overheating or having the limit switch cut out.

If you are going to try this, look up the return air area spec for your furnace model first and make sure you have much more area than that.
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Old 10-10-2020, 05:30 AM   #6
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Unless your furnace is rusted out inside the only insects coming out that louvered vent ate the same ones that went into that vent.

In which case you most likely left the door open to the camper.
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