Question

Should we replace broken solar powered attic vents?

Asked by bruce burkitt
Kihei, HI

We live in hawaii. Temps are 80-90 daytime and 65-72 nighttime. We like the house around 78. Only run a/c maybe 45 days a year. 4000 sq ft house with tile roof, continuous soffit vents and 6 inch batting insulation. We have 4 broken solar powered attic vents installed on the roof now. We have a solar pv system with extra capacity so power is essentially free.

Answer

Sean Lintow Sr

Answered by Sean Lintow Sr

Naperville, IL

SLS Construction & Building Solutions

December 4, 2012

Let me first turn this around - what made you notice that they were broken? Was it because of an issue, or did you just happen to be up there and go - wow this isn't one isn't moving and wow none of the others are either?

For 95% of the homes I have seen, especially with a tile roof (which essentialy blocks radiant heat transfer & has its own venting) there isn't a need for "assisted" ventilation.

Might the attic be a fraction cooler with them - sometimes.

Where are your ducts located? If they are in the attic, the ventilators might help some, but it would probably be better to make sure they are well sealed & insulated.

Will it save you the $1600+ to replace them - not even close especially when you only need the AC 45 days a year.

 

For more information:

Read "How effective are the different attic ventilation methods? I read mixed reviews, and many have a commercial bias." a Q&A answered by Danny Kelly.

Tagged In: attic ventilation

Do you have a question about greening your home? GreenHomeGuide invites you to Ask A Pro. Let our network of experienced green building professionals – architects, designers, contractors, electricians, energy experts, landscapers, tile & stone specialists, and more – help you find the right solution.