Napoleon Ascent Multi-View BHD4PNA Manuel D'installation Et D'opération page 14

minimum venting requirements
EN
3.3 converting from 5/8" to 4/7" venting
1
Use Mill Pac to seal adapter to the appliance collars.
3
Use Mill Pac to seal adapter to the appliance collars.
5
Use red RTV silicone sealant to seal adapter to the appliance collars.
note:
Depending on your adaptor kit, the 4/7" venting components may not come pre-assembled.
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W415-4020 / 08.09.21
2
4
6
X3
X3
X3