Due to lack of space the contractor going to place some of the AHUs over the roof of the transformer room, does this installation comply with NEC? if yes how we can control the issues with AHUs e.g. drainage, vibration?
Vibration - may mean mount them on a separate structure that is independent of the roof.Due to lack of space the contractor going to place some of the AHUs over the roof of the transformer room, does this installation comply with NEC? if yes how we can control the issues with AHUs e.g. drainage, vibration?
That's a sensible reasoning.Vibration - may mean mount them on a separate structure that is independent of the roof.
Drainage - if it is above the roof don't you want a roof that keeps rain out anyway?