In this article I present the Honeywell HR25 Energy electronic radiator thermostat. The article is part of the series “Electronic radiator thermostats in test”, in which I review and evaluate programmable radiator thermostats from various manufacturers.[Read more…] about Review: Radiator Thermostat Honeywell HR25 Energy
In this article, I present the Honeywell HR30 Comfort+, which does not have a Smart Home connection but is still one of the best electronic radiator controllers from Honeywell. This article is part of the series “Electronic radiator thermostats in review”, in which I test and evaluate electronic radiator thermostats from various manufacturers.[Read more…] about Review: Radiator Thermostat Honeywell HR30 Comfort+
In this article I have tested for you a solar system in a complete set and show you my experiences. I received the Autarkic S-Master 100W Solar System - 600W AC Output 12V 230V* from the company Offgridtec for testing, with which I would like to thank once again very much.[Read more…] about Review: Solar System Autarkic Complete Set from Offgridtec
In this article I will show you how to calculate and design a central heating pump (circulating pump) with only few data. This calculation method is mostly used in existing buildings, because technical data is hard to find or not available at all. In a small example calculation I show you that the calculation of a heating pump is easier than you think. Afterwards we will design a central heating pump using the example and choose the right model for our application.[Read more…] about Design of a central heating pump with example calculation
The head of a heating pump is not as easily explained in one sentence as you might think – or maybe it is? Here is a definition attempt from Wikipedia:
“In fluid dynamics, Total Dynamic Head (TDH) is the total equivalent height that a fluid is to be pumped, taking into account friction losses in the pipe.” Total dynamic head – Wikipedia
I think this definition is a bit confusing and therefore I would like to explain the term “head” for pumps a bit easier.[Read more…] about What is pump head and why it’s important?