This isn't a proper how to but I thought I'd share a few photos of my brew fridge, made in early 2013 and at the time fermenting a Festival Landlord's Finest Bitter.
It's not the neatest job but it was cheap and easy.
Instead of expecting the glass shelf to support 25kg of beer it's resting at the back of the fridge plus a Wilkinson cheapo emulsion paint tin that I cleaned out.
Taking a sample of the Landlord. I could probably have fitted the trial jar under the tap but the jug guarantees I won't spill any.
Components and costs:
Fridge - free thanks to my in-laws having a new kitchen.
Heater - £12.50 eBay
STC-1000 - £18 eBay. You can get them cheaper but I chose a UK seller to get it quicker and guarantee no extra VAT.
5m 16A cable - £3.50 Local electrical store.
3m 6A heat resistant cable - £3 Local electrical store. I needed this as the flex supplied with the heater was too short
Terminal block - 59p (and I only used half) Local electrical store
Sockets - £1.75 each Wilkinson
Box - £1 Wilkinson
Mains plug - free as I already had one
RCD - free as I already have one. The consumer unit also has RCDs but it keeps SWMBO happy.
So that's about £42 plus fridge.