Honeywell IAQPoint2 User Manual page 1356

Specifications
Product Dimension Diagrams
Profile Dimensions
Once the unit has been wall mounted, only a 3.3cm (1.5") portion of it will
protrude from the wall, as shown in the diagram below.
Wall/Mur
3.3 cm
1.3"
Mounting Plate Dimensions
The mounting plate fits the standard type electrical box and is affixed in
the same way as a switch plate.
40 IAQPoint User Manual