We have a 2012 Thor Four Winds Class C, a 24C. This summer has been very humid as well as hot, with plenty of rain. While checking the cabover for leaks, we discovered mildew and dark (black...
X2 - we used this under the mattress of our truck camper with a cab-over bed. Never had a problem in over 1000 nights of use. We did not have a mold problem, just anticipated it could happen with cold meeting warm and so invested in the Hypervent product.
