The first step of my swamp cooler project is to figure out the construction of the evaporative cooling vessel.

I’d like to use an upturned terracotta pot for the vessel itself, with air entering at the bottom, passing up the inside and out the drainage hole at the top.

Unlike the Cold Pot – which pushes air through a dry aluminium sleeve – I’m trying to maximise the surface area of wet terracotta which the incoming air passes over before emerging from the exhaust.


It has been hot here recently in Catalunya. Like 40°C and forest-fires-covering-our-patio-in-ash hot.

Luckily, the house is traditionally constructed with extremely thick, solid stone walls which means the worst of the heat doesn’t make it inside – so long as we remember to shut the windows. Even so, a little extra help to keep the temperature down during the day would be very welcome.


James Brady

I’m a professional software engineer and an amateur woodworker. I like Ruby, Elixir, hard problems and learning new things with which solve them. I am fascinated by frisbees to the point of it getting a bit weird. I’m learning to speak Catalan. I am mostly vegetarian. That is all.

Oristà: a teeny tiny village in Catalunya