Question: Considring installing “sun tunnel” for light to dim area. Whats downside & how much light can I expect?
concerned about
. heat loss,
. condensation,
. excessive heat,
. leaks in roof,
the 14″ diameter tube will be about 9 feet long from pitched roof to level ceiling, with a diffuser, in upstate New York.
Any experiences out there to share would be appreciated.
I saw it installed on a DIY show a few months ago and was very impressed.
Answer:
Answer by Gitchy gitchy ya ya da da
Open the drapes on a small north-facing window — that’s about how much light you’ll get from a sun tube the length you’re looking at. With an internal hallway or bath that can be quite a stunning difference.
Heat gain/loss and condensation will depend on the quality of the unit, just as it does with any window.
Leaking should not be an issue — structurally, this is no different from an exhaust vent. Call a good roofer for the external portion of the installation.
Read More

