Friday, October 17, 2014

Ground source heat pump – Top 5 mistakes

There are quite many failures or mistake when purchasing or installing ground source heat pumps. Here are top 5 I'm hearing from users:

  1. The output power of the heat pump is too high or too low. The problem is that nobody made his homework. Nobody made calculations how much power is needed according to the heat loss of the house. Usually the customer buys too powerful heat pump.
  2. The dimension of vertical or horizontal ground sourced collector is too small, too weak. Again nobody made his homework. There is absolute need that one engineer prepares the blueprint and proper energy/heat calculations for the heat pump and for the collector.
  3. The low temperature heat pump is attached or installed to existing high temperature heating systems. This is usually a big mistake. In such cases heat pump can be used as secondary heat source for low temperatures, but for very cold days your should use more powerful and high temperature source (e.g. gas or oil).
  4. Instead of existing furnace (oil, gas, wood) the heat pump of same power is installed. Usually this will not work. One one hand existing furnace was probably too much powerful and there is no need for the heat pump of the same power. On the other hand heat pump will probably ensure only temperatures up to 50 Celsius which is too low, unless high temperature heat pump is used. 
  5. Installations in the ground are not of good quality. Since the investment in ground source collector is pretty high, the installation must be of 100% quality. No errors, damages or leaks are permitted. If there is a problem it is very hard first to find the spot of error and second the repairs are very expensive. The vertical collector must run without problems for 30 years. Request proper warranty.

When installing a heat pump in old house and old heating system, I would definitely propose to first insulate the house and change windows and after that install heat pump system.

Monday, August 25, 2014

Monitor Heat Pump Electricity consumption

This winter 2014/2015 a have a new device and a tool in place to monitor my Heat Pump electricity consumption. It is called Efergy Energy monitor ( You can track the consumption at the very moment, you can track average consumption, consumption per day or month, you can monitor costs per day, month and some other statistics and future predictions. I'm now in the testing phase and it really works fine. I can monitor my consumption either on the web via personal computer or Android phone (you can download the application on the G. Play). I already found some strange deviations and what is causing real costs. I will be able to check if the Heat Pump specifications regarding energy consumption are something you can trust. Hope you like the post ... I'll be back :-)