Air Quality for Liveaboards

[GordMay]

Disclaimer: I am an interested amateur, with some peripheral experience in mold remediation - I am not an expert.

If you want to avoid mildew and other moisture related problems, keep your boat both DRY and CLEAN.

Most of the molds found indoors, actually come in from the outside, and proliferate in areas of high humidity. The growth of molds can be prevented by carefully regulating the indoor environment (temperature between 60̊ and 65̊F (15̊–18̊C) and RH below 50%) of the boat.

Products containing paraformaldehyde are "toxic" to both mildew and people.
Cautious use of evaporating fungicide crystals (e.g., paraformaldehyde, or paradichlorobenzene), in an enclosed area, such as an air-sealed boat, may reduce the airborne mold levels for a period of months.
Any living space, treated in such a way, should be well ventilated afterwards (for at least a day) before it is re-occupied.

Paraformaldehyde, if used as a disinfectant, is required to be registered as a pesticide (1988 EPA FIFRA pesticides subject to regulation). Paraformaldehyde is a polymer of formaldehyde and, when heated (an inherently hazardous procedure), produces formaldehyde gas. Formaldehyde has been identified as a mutagen and a carcinogen, and the current exposure level standard is 3 ppm.

Safety data for paraformaldehyde
PARAFORMALDEHYDE
Safety (MSDS) data for paraformaldehyde

And:
Chemical Mildew Inhibitors: Should I Use Them? How?