↳ In-reply-to » Thanks for the comments everyone. Bit worried about humidity inside the room, two computer 12V fans is series, might help remove the stale air trapped inside?

@lyse Maybe, have a single computer fan removing the H2S smells from pit compost toilet, a room about 1.5 by 1.0 by 1.5m and this fan works 24/7 has done for 4 years, plus AGM lead acid battery for 4 years, remarkable really. No dead battery after 4 yrs, but it daily cycles to 95% fully charged each day.

I will see how this room stands up, two fans on 24/7, size 4 by 2.8 by 2.0m.

Cheers