Apr 152013

SOLARdiagramDuring a long period of the year we get the hot water in our hose from the sun. We use hot water for showering, our hot-fill washer and our hot-fill dish washer. If the sun is not shining (living in the Netherlands it sometimes happens :-) ) the central heater unit warms the boiler. Of course I wanted to know when I can switch off the central heater, mostly its in May.

So for the measurements  I’ve connected a few One Wire Digital Temperature Sensor (DS18B20) to a Netduino-2 and wrote a small C# program which sends each 2 min. via WiFly the data to ThingSpeak. For measurements look here.

Jan 062013

Well, the question is what you save with a wireless radiator thermostat.. The only way to know is to measure, so I’ve started a little project. I bought a Netduino and a PIR Sensor with three  Thermistors. Piece of C# code crated for the .net micro framework. The first results are shown at ThingSpeak. It’s easy to add a ThingSpeak plugin so a Google Gauge can be displayed for the actual temperature. For the actual status look here.

Now I have to think how I can calculate the energy usage based on the dimensions of the radiator and the temperatures in the room, radiator-in and radiator-out.

RoomGaugeMotionBackroom Rad.in



Dec 312012

Since this year we use the eQ-3 MAX! Electronic Wireless Radiator Thermostat to regulate the heating for each room.2012-12-29 18.07.39_b

Some Dutch energy suppliers offers this product types (Essent E-thermostaat) but it’s main disadvantage is the control over the whole house and not the regulation per room. And we like to be more or less independent from the energy suppliers so each year we can select the cheapest green energy.

In this post a short description of the eQ-3 MAX! Electronic Wireless Radiator Thermostat with some pictures. Continue reading »