Matt Risinger interviews Ken Gehring, the founder of Ultra-Aire, at the 19th Annual Westford Symposium on Building Science. In this in-depth discussion, Gehring discusses all things dehumidifying, like why a variable speed air conditioner only reduces the need for having a dehumidifier but can never replace one. Risinger questions him on an ERV vs. a dehumidifier. The verdict simply go for the dehumidifier first, and add the ERV later, if cost is the concern.The future product line for Ultra-Aire, according to Gehring, will follow the quest for improved efficiency. The company also want to focus on how to avoid putting fresh air into a building when it isn't needed, which would improve the operation and cost of conditioning a house. He makes an important point when addressing total-comfort systems you need an airtight structure, one that pulls its weight and removes water. He advices young builders to learn how to build a tight building, to find an AC contractor that knows what they're doing or someone young and willing to learn, and to get the best supporting equipment that you can. For more of Ken's wisdom on his dehumidification process, watch the video.