Shown here is an energy efficient rooftop damper in the open postion. Also availible with a cap and screen design.
This is the energy top damper in the closed position sealing out the elements as well as rodents.
This is a comparison of the most popular damper on the right and a more recent design on the left. The engery top to the left opens higher for better flow. The one on the left is much easier to operate.
Shown here is a solution for cross over smoke for a multiple flue cap. When the flue liners are all the same height individual chimney caps will not fit and cold air will push fumes and or smoke down the unused flue
With proper spacing standard chimney caps can be installed.
