More and more people are buying a wine cooler for their home. It’s a nice idea – keep the wines on display but at just the right temperature.

An ordinary fridge is too cold for wine storage but what if you could convert your spare fridge into a wine cooler? It could be much bigger than a typical bar fridge-style wine cooler and probably more efficient into the bargain.

All you need is a precise and adjustable thermostat which will over-rule the existing fridge thermostat. That’s just what the CoolMaster does.

In essence, the CoolMaster plugs into the wall power point and the fridge is plugged into it. Then the CoolMaster’s temperature sensor is installed in the fridge, with its two- wire lead brought out under the rubber door seal and it then over-rules the inbuilt thermostat.

We’ve had quite a few requests for an electronic thermostat project, to convert a spare fridge into a wine cooler as simply and safely as possible. So that’s how the CoolMaster came to be developed.

But an article in January/March 2005 issue of the the Alternative Technology Association’s "ReNew" magazine featured a conversion of a chest type freezer into a very efficient fridge.