I am fairly new to the Scamp camping. I bought my new-to-me 13 ft Scamp in 2021 and have camped 73 nights, mostly traveling in the day and staying in parks or at Walmarts or Cracker Barrels at night. Most of the time I camped in cooler climates with temperature ranges from low 20’s to mid 40’s at night and the moisture accumulation in the closed up Scamp was a problem. The simple solution is open a window, but of course the cold air is also a problem. I have installed heat recovery ventilators in my home and realized such a device would be useful in the Scamp to provide fresh air during cold weather and eliminate the moisture without the input of cold air.
I searched for a ventilator that would use a small amount of power and fit in the confines of the Scamp but found none commercially available. I came across a DIY experimental design that was made from a combination of plastic plumbing pipe and 3D printed parts that looked promising. It is a counter-flow design so high efficiencies are possible. I designed and built a prototype version that fits inside one of the benches in my Scamp. After installing it I spent 3 weeks on the road with most nights being in the 30’s and low 40’s.
The results are very encouraging. With all windows closed at night I had zero accumulation of moisture on the windows and bedding and the ventilator brought in fresh air at virtually the same temperature as the the interior of the Scamp, about 65 degrees, regardless of the outside temperatures. The air flow in and out is about 2 CFM which exchanges the air in my 13 about every 2 hours. The fans draw less than 1/2 amp so battery drain is minimal. I am working on version 2 which will provide more air flow, hopefully about 4 CFM, and also hopefully without reducing the efficiency.
I am interested in suggestions or questions about my system. It may or may not be commercially viable but its an option I am considering. The parts are either off the shelf items or 3D printed parts. 3D prints are time consuming but inexpensive as a DIY so I suspect most interest may be from those who can build and install it themselves. As version 2 progresses I can post up photos of the install if there is interest.