Rent a core drill rig, purchase a 3/4"x9" sleeve anchor or titan HD to hang the rigs base, hook up the water and core away, even hitting a single piece of rebar you should be done in 15 minutes.

Jon, I have not seen an HRV/ERV that can take a dryer vent...I too have asked that same question before

I wonder what the issue is. Lint? Too much flow to be very efficient (who cares, anything is better than dumping 100% of the heat outside and replacing it with cold air pulled through the walls).

Posted By jonr on 22 Apr 2013 08:15 AM
I wonder what the issue is. Lint? Too much flow to be very efficient (who cares, anything is better than dumping 100% of the heat outside and replacing it with cold air).

jonr - in commercial installations we are not even allowed to have screws into the duct for fear of catching lint. Other concerns would be volumes of air (as you suggest) and volumes of moisture as well as static resistance to the airflow shutting down the dryer/ creating inefficiencies in the drying.
This is of course based on present hrv technology. Maybe a complete rethink might come up with a different way of doing it. It would definitely need to deal with water recapture a well as some methodology to prevent total freeze up in cold climates.
If there is room, maybe coaxial piping were the warm moist air stays in the center and incoming air on the outside. The pipe would have to be vertical or at least graded to allow for water capture. Maybe think drain water recapture technology. Circulate path for the incoming air might increase the efficiency and decrease the required length.
Of course it would have to gas vent compatible if that is the fuel of choice.
Just some thought.

I could imagine a dryer where the exhaust gases (eg, nat gas combustion byproducts) are kept separate from the moist air stream from the clothes. The latter could conceivably be vented into the interior. I know someone who did this with an electric dryer (+ a filter) and they were fine with it.

I wonder what the issue is. Lint?

Most likely. Even if you put a filter on the dryer exhaust, it wouldn't take long for the heat-exchange medium to become clogged with small fibers. Even a light coating of lint would reduce effectiveness noticeably. Owner maintenance of the wheels by washing is a substantial issue as it is.

I have to clean the lint screen in the dryer every use anyway. Wouldn't bother me if it were bigger and much more effective.