Exhausting

…but in a good way. Taking a break from the plumbing, I mixed it up a bit by working on the bathroom exhaust fans and electrical work.

The main ventilation fan for the bathroom is in the shower to help exhaust moisture. It was surprisingly difficult to find one that moves a lot of air volume, is quiet, doesn’t take up too much space and runs on 12 volts. I found a unit made by a company in England called Manrose, but didn’t realize till after cutting the vent hole and framing the space for the fan it runs on 12V AC not DC (12V DC is the standard for boats and RVs in the US, low voltage AC is very uncommon here).

Wiring the Manrose fan connections
Wiring the Manrose fan connections

I got around this electrically by using a small 12V DC to 120V AC inverter connected to a 120V to 12V AC transformer (Rube Goldberg would be proud) – not very efficient, but it was easier than putting a new DC motor into the unit or reconfiguring the vent holes for yet another fan.

Inverter and transformer on left, installed fan on right, spaghetti bowl of wires in middle
Inverter and transformer on left, installed fan on right, spaghetti bowl of wires in middle

The other fan I worked on is for the Nature’s Head composting toilet. The “#2 chamber” has a small 12V fan that connects to an exterior duct to vent funky odors. I fabricated a custom vent from a 2″ soffit vent and some PVC pipe fittings, which plugs into the head’s vent pipe like so:

Fart amplifier, err, toilet venting system
Fart amplifier, err, toilet venting system
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