Indoor Humidity Research Vancouver

OK, so I strongly suspect that we've got too high a humidity level inside the house. So, I got a hygromer ("humidity measurer") from Canadian Tire. But I didn't know what the proper goal was.

Let's see what the web says:

The Canadian Asthma Consensus Report of the Canadian Medical Association recommends a systematic program to eliminate, or at least substantially reduce, allergen exposure in sensitized people. It suggests that humidity in the home, including the bedroom, should be kept below 50%.

Source: http://www.on.lung.ca/air_quality/IAPRS_dustmites.html.
The USA's EPA had this:

High relative humidity (RH) can lead to problems with mold, dust mites, and other biological pollutants. Using exhaust fans in the bathrooms and kitchen can remove much of the moisture that builds up from everyday activities and help to keep RH below 50%.

Source: http://www.epa.gov/iaq/homes/hip-moisture.html
The good ol' CHMC also recommends RH of less than 50% in winter. A lot of good tips actually. (You might have to visit cmhc.ca and search for humidity, the link below doesn't look promising)
http://192.197.69.106/en/co/maho/yohoyohe/momo/momo_001.cfm
My thread on Usenet:
http://groups.google.com/group/van.general/browse_thread/thread/ebd0794142523d34/#

So, 50% sounds like a generally good rule, but this is Vancouver, the land of rain, rain, and a little bit more rain. So the search for a number specific to Lotus Land continues...