Designed for multi-fuel pellet stoves, the Simpson DuraVent 3 in. Appliance Adapter Increaser mounts to 3 in. flue outlets to increase their diameter to 4 in., ideal for high-altitude applications.
- For use with multi-fuel pellet stoves (pellet or biofuel)
- Attaches to 3 in. appliance outlets to increase the flue diameter to 4 in.
- 4 in. vents are ideal for high-altitude applications (over 4,500 ft.) and installations taller than 15 ft.
- Double-wall air insulation
- Seams are factory sealed
- Easy twist-lock pipe connection