Hi.
I have an old ecodan14kw setup. 12 years old now. Has worked ok but never perfect. I am looking to replace and feel I can get a smaller unit, perhaps 10kw. I have followed a number of topics re: buffers, low loss headers and direct connection.
Can someone point me in the direction as to how a dual zone setup is best configured/controlled. I have downstairs ufh and upstairs radiators. Properly sized for heat pump application.
I know a lot will depend on which heat pump. But interested in best practice. I will aim to plumb the whole thing myself if possible! Fairly experienced so really just best practice information so I can make an informed choice.
Have you worked out what your actual heat loss is on the coldest day?
The CIBSE calculation shows 9.5kw heat loss.
Actual heat meter consumption, for heating and hot water shows approx 18000kwh per year. Not sure how to correlate those two. COP just below 3 as the annual average!
Do you have daily data from your heat meter? How many kWh produced on the coldest day would give a very reasonable estimate for how big a heat pump you actually need.
I haven’t got daily readings just quarterly. But if I look at December to end Feb, would give me an average of 97kwh per day of heat, including hot water.
Have you considered getting rid of the zones and running it all open-loop? This would be best for efficiency. It will also make plumbing and controls easier.
Yes. A couple of years ago I removed all zones downstairs (UFH). This is one one thermostat and upstairs (radiators) on another. Tempted to go to one zone fully and no thermostat. That would be my intention when I replace the ecodan
1 Like