First month with heat pump central heating
The weather has finally become cold enough for the heat pump to start heating the house rather than just doing the hot water. This post covers the settings we are using and the settings we have changed so far. You can see the heat pump statistics here.
We have a Daikin Altherma 4kW (EDLA04E2V3). It was installed in July by Octopus Energy. Until late October it has only been doing hot water. From the hot water point of view we have it set to schedule and reheat mode. This means if the tank gets too cold it will reheat the water. This will stop the water having to be reheated from a very low temperature. We also have enough hot water when needed.
We have two schedules set. 2am and 4pm
The reheat temperature is 45c
The schedule temperature is 48c
From a central heating point of view we started with this
21c from 5am to 9pm
We found that on some mornings it wasn’t quite cold enough to come on. We changed to the following. This worked very well, but turned out to be a bit too warm
22c from 5am to 7am, 21c from 7am to 9pm
We are now using these settings
21c from 3am to 7am, 20c from 7am to 9pm
This makes the house nice and warm in the morning and is kept at a lovely temperature all day long.
One of the first things you will notice when you change from a gas boiler to a heat pump is how little warmth comes from the radiators. With gas the radiators are very hot. With a heat pump they almost feel off, but they are constantly just giving out enough heat to keep the house warm. It is amazing how little heat they generate, but the house is still warm.
For those who are interested, our house as 10mm microbore pipes and we have had no issues.