ECOVENT USA EV-SHT Installation Instructions Manual page 6

3. Install Support: For installation into a flat ceiling, you may use either the
Round Support Box or the Square Ceiling Support Box. For the Square Ceiling
Support Box, refer to the Square ceiling installation below. The Round Ceiling
Support Box has the option of a square or round Trim Collar available (Fig 5).
The bottom of the Round Support Box must extend at least 3 inches below the
finished ceiling. Level the Support Box and secure it to the framing using at
least three 8-penny nails per side (min. of 12 total ). Alternatively, you may use
1-1/2" #8 wood screws (min. of 12 total), instead of nails. Next, secure the Trim
Collar (round or square) to the framing members using provided hardware (Fig
6).
For installation into a cathedral ceiling, you must use the Square Ceiling
Support Box and the two-piece Trim. The bottom of the square portion of the
Support Box must be a minimum of 2-inches lower (round portion is an
additional 3 inches lower) than the finished ceiling at the lowest side of the
penetration (Fig 5 & 6). Level the Support Box and secure it to the framing
using at least three (3) 8-penny nails per side (minimum of 12 nails total), or a
minimum of (3) #8, 1-1/ 2" wood screws. Adjust the overlapping "U-shaped"
Trim pieces so they cover the Support Box, and secure them to the framing
members using provided hardware
Fig.3
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