Knowledgebase
Mechanical Ventilation
Posted by Mike Gordon on 22 July 2015 02:22 PM

Mechanical ventilation systems that provide no mechanical cooling themselves, but serve spaces that are cooled by other means are included. Any components contained in air conditioning systems that are only intended to provide heating are excluded.

TM44: 2012 page 5 Any air conditioning system serving any space that is also served by a mechanical air supply system is a level 4 complex system.

This covers all ducted fresh air and heat recovery systems.