Rooftop Packaged HVAC Units Explained

[@zaclone2372]

my friend you are a life saver! you just explained it way better than my professors:) Much love from Kuwait

[@MEPAcademy]

Thank you

[@coreygamage1457]

Great videos so far. I'm watching them all from the oldest to the newest. This section perhaps needs more explanation of what duct static pressure is and when economizer mode should be used.

[@MEPAcademy]

Thanks for the suggestion. We'll be sure to cover these topics in future videos.

[@bxx7666]

On the smaller systems with just a supply fan, is there a return vent or something? How does the air go out?

[@MEPAcademy]

There are several strategies for relieving building pressure. Here are the most common methods, 1) Barometric relief dampers, 2) Powered Exhaust Fans, 3) Relief Air Dampers with Economizer Functionality, 4) Modulating Relief Dampers, 5) Building Pressure Sensors and Control, 6) Natural Relief.

[@jasonjohnsonHVAC]

I work on a lot of Intellipaks. Probably my favorite rtu

[@MEPAcademy]

The industry needs a lot more experienced technicians like yourself. Thanks for watching.

[@danielamador4306]

What’s the difference between auxiliary electric heat and back up electric heat on a ASHP RTU?

[@MEPAcademy]

In area's where the outside temperatures get really cold, the use of a backup heater can supplement the limited capacity of the unit.

[@streetpharmacist]

Why go 100% outside air, isnt that inefficient?

[@MEPAcademy]

There are times when the outdoor air can satisfy the load without running the compressor, that's why economizers are mandated by energy codes. See our other video on Air Economizers for a better explanation. kzbin.info/www/bejne/aIamnoGpbdZ6eM0