Solar panels

[Rossi90]

Hello not sure if this is the correct section so I'm sorry if its not. We have solar panels on the property and also the passive heating system where heat is taken out of the property to heat the property. Over the past couple of weeks where the extractor is in the rear bedroom we have been getting yellow water stains marks and these have got worse over time. I have been up into the attic but can't see any roof leaks. We have had bad weather lately with heavy snow falls. The property is only two years old and can't see anything which would explain the yellow stain marks. I would appreciate it if anyone has come across similar problems as I'm stuck for answers and don't want the problem getting any worse.

Thanks

 

[Agile]

I dont see how anyone can say what the stains are from without visiting. Your property may still be under some kind of warranty.

For others his passive system is probably a heat recovery ventilation!

Tony