Dimensions:
TN1
A-150mm, B-150mm, X-190mm, Y-190mm
It is flat on the back
TN2
A-150mm, B-220mm, X-190mm, Y-260mm
It is flat on the back
TN3
Duct Fitting size - 100mm
A-150mm, B-150mm, X-190mm, Y-190mm
There is 100mm ducting pipe/hose connection
TN4
Ducting size - 125mm
A-150mm, B-150mm, X-190mm, Y-190mm
There is 125mm ducting pipe/hose connection