Make Up Air Units - The Basics
In this video, I discuss the basic components of a Make-Up Air Unit.
These types of systems are also known as 100% OA Units, OA Units, Dedicated OA Unit, DOAS Systems, Dedicated MAU, and many other names.
The basic function is to cool, heat, dehumidify and sometimes humidify outdoor air before bringing it into a building. Outside air is required to make up for the exhaust leaving the building otherwise you will have a negative pressure which can lead to infiltration, mold, and mildew issues.
The OA unit must be able to accomplish these overall load conditions, during all seasons of the year. Features like modulating hot gas reheat, modulating compressors (digital scroll, variable-capacity compressor (VCC) or VFD Compressors), modulating condenser fans and the proper application-specific controls are a must.
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Email Me: Tony Mormino
tmormino@insightusa.com
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I sell commercial air conditioning equipment in Western North Carolina (Greater Asheville). I also sell AC equipment to national corporations through AAON's National Account Program. My passion for teaching and giving back to the HVAC community has inspired me to create free educational videos, virtual lunch and learn presentations, and webinars.
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Email Me: Tony Mormino
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Thank you for watching and please let me know if you have any questions!
Пікірлер: 9
Thank you so much for your clear explanation.
Very clear and to the point. Thanks. I will be looking through more. I have a couple problems i need to solve re negative pressure cleanrooms that all compounding pharmacies must be USP 800 compliant due to newly implemented regulations. Current system not enough to account for 12 ACPH which is the requirement for Level C non sterile room. I believe I'm going to require supplemental source of air and trying to get a grasp on the process. Seems like the HVAC 'cabal' has this info very well guarded lol.
I think in the winter mode, it would be good to have a humidifier as well not just only a heating coil.
how to add pre-treated cool fresh air in HAP program
Hi! is there any pro/cons between outdoor make up air units and indoor one? gas plumber are very expensive and bring the natural gaz line up to the roof top maybe an issue... also many told me that electric heated make uo air are very expensive on bills, espcially in Canada where temperature go down to minus 20 easily in winter. someone can answer me?
I figured that on a hot day you'd want to keep that 50° blowing into the inside. 72° sounds way too hot.
@kevonslims7269
Жыл бұрын
Down here in south florida 72degrees on a 95 degree day will trigger no cool calls no matter how dehumidified that 72 degree air is..
@donavonkeith8411
11 ай бұрын
Your correct. Send it to the downstream units and let the conditioned OA mix with return air and lighten the down stream coiling cools
I wish the best for You. How many videos have you made? Let's Build each other Up xP