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Make-up Air

Bulley
Member Posts: 2
I'm looking to add make-up air intentionally instead of letting it suck through the cracks. Is this a good idea? I already have a hard time getting the humidity up even with a whole house fan powered humidifier.
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Comments
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An ERV would work, or if you have central air conditioning or a warm air furnace, an Aprilaire 8126X Ventilation Control System will bring in filtered air (through the existing return duct) to put the envelope under a slight positive pressure. It can be regulated by temperature and humidity.0
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What is "make up air" to you? Are you talking about replacing air exhausted from bathroom fans and kitchen hoods, or the air used by burners, or just the infiltration/exfiltration going through the envelope?0
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He probably talking about air leaks from stack effect. Pulling in air into a controlled filtered location can reduce the negative pressure somewhat. More important with atmospheric equipment.
I have a 6” constant makeup air duct into my downstairs air handler and a 6” dampered inlet in the boiler room that open with a heat call.
I did this instead of an elaborate radon mitigation system. Levels in basement were creeping over 8-10 in the winter. With this system it’s under 4, averages 2.5. Levels are <0.5 on the 1st floor.0
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