Indeed I do:
Thermal wheel - Wikipedia, the free encyclopedia
There are brushes between the two sides that helps avoid that much air is resirculated. Poor maintenance of these often results in bad odors returning back into the house.
It is very important that you position the input and outputs at the right places, and that you make extensive use of noise traps on all incoming places (bedrooms, living room). Usually it is enough with two noise traps in series at the heat recovery unit shared by all outgoing places (all bathrooms, washing room (because of damp air) and kitchen. Have a separate output for the cooking place with a non return valve on it in addition). Make sure that there is a little lower pressure inside the house than outside (pull fan and exit valves more open than for incoming). This to make sure that you don't push hot and moist air out trough the leaks in the walls where it will condense and give you rot and fungus problems. If outside is hot and humid most of the time, and indoors is cooler than outdoors, do the opposite.