Good clear description of VRF - Needs to be longer and go into more detail

Ben W.
August 26, 2026

Short and sweet and helpful

Gerald V.
June 23, 2026

Very compact course.

Laurie M.
December 25, 2024

Nice intro to VRF - didn't know much to start ... know a little more now.

Robert C.
December 22, 2024

This was very interesting. I see where these systems could be very useful and become a go to choice as an alternative to more complex and costly systems.

Gary J.
September 26, 2024

n/a

Frank S.
December 31, 2021

How can you provide outside air within the system?

David S.
July 18, 2021