Moisture on windows

[BMW Rider]

I tried a dehumidifier, but found that it really didn't help much. I have been keeping a bathroom fan running full time, and that seems to be more effective. The heat recovery ventilator will do pretty much the same thing, except it uses the exhaust air to warm the fresh air reducing the energy loss with very little more power used than the bathroom fan. I am considering installing one also, but I have no idea where I will put it. My furnace room is packed full, and I still need to put in the vacuflo. I have had some trouble with the water heater lately, and I may replace it with a tankless one which would clear some space. I will also need to figure out where to run the vents to, not an easy task in a fully finished two storey home.