What is your suggestion for ventaltion in an installation for a home with two HVAC units in the attic?

Thursday, July 15, 2010 by Aprilaire Team
Consumer question:

What is your suggestion for ventaltion in an installation for a home with two HVAC units in the attic? Can I use just one Aprilaire 8126 unit and control somehow?


Aprilaires' response:

Thank you for contacting us with regards to our Aprilaire Model 8126 Ventilation Control System. This system is designed for use with just one HVAC system. It will ensure that your home receives the proper amount of fresh air each hour to meet ASHRAE 62.2 ventilation requirements. Calculations are done based on distance between the HVAC system and the fresh air intake, the measured air flow resistance and type of duct used. A fresh air delivery rate can be calculated and then compared to the volume of air required to meet the ASHRAE standard. If the delivery rate exceeds the required air, one system can be used. If the requirement exceeds the delivery rate, more than one system will be needed.

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