JoeBano

I’ve got heatmiser fan coil stats do cooling and heat. Need 3 pole relay to get it to work because I’ve got a 4 pipe buffer setup.

I got a tiny bit of condensation on my pipe works yesterday but it was very humid. 12c flow temperature seems to be the best outcome for me.

I was having a look yesterday for my kitchen, found theses https://theheatpumps.co.uk/products/chilled-water-fan-coil-units.html I have no idea how quiet they are. Might be a starting point…. ive got myson Ivectors in the bedrooms quieter than a normal fan blowing about, managed to keep the bedrooms at 20-21 while it was 29c outside without insulating the pipework. They are control by heatmiser fan coil stat

You could swap the radiators for fan coil units? I swapped mine beginning of last summer worked a treat. Not insulated the pipework, 16c is my flow temperature not had any issues. I’ve got myson Ivector units, think they are brilliant, lowered my heat flow temperature to 32c @ -2. My bedrooms suffer room overheating in the late evening, they kept the bedrooms at 20c on the hottest days last year.

Glad I changed mine to heatmiser neo stats now. Always got sick of nest changing my schedules

If you don’t want any issues in 5 years time I would follow the spec. With silicone render you get issues in the long run. You used be able to get anyway with just OCR on blockwork, primer and finished in tf but Weber now insist on rendaid basecoat with meshcloth for guarantee.

I run 2 zones upstairs and downstairs. Gone back to a 4 port buffer and now got a balancing valve on the return heat pump side. Seen the short cycle reduced in this mild temperatures. Probably not the way for a new build but I live in 1930s solid brick house and with one room can be 21c and the next room 19c, completely different scenario to a new build. I use my stats as a temperature limiter, weather compensation set up for a max room temperature 21c @ -3 room stats set for 21.5c. The other reason is cooling in summer it’s needs very little cooling downstairs but upstairs is very warm for sleeping.

My extractor fan in the downstairs toilet is louder than my grant aerona3 unless it’s doing a hot water cycle the compressor noise is louder.

My grant anerona3 hardly goes into defrost, it is sat on my garage roof gets plenty of circulation up there. I hope the new ones have a modulating water pump rather than a fixed one on mine.

I used Weber floor system in my hallway needed something that could take foot traffic in 3 hours. It’s 50mm thick I used Ritmo render machine, 22 bags in 30 mins. It was warms up very quick compared to my traditional floor screed (65mm) in my kitchen but that keeps the heat way longer. Bag screed costs 3x times more than traditional screed.

My living room wasn’t hitting 20c I wanted it to be, tried increasing the flow temperature that didn’t work. In the end I drop my flow temperature down back to original temperature and dialled my flow rate on the hallway Ufh and now it’s achieving 20c, hallway is still hitting 20c aswell. you might just play with it’s the balancing, how loops do you have?

Good video on how to work it out. Don’t know glycol heat capacity, someone will know here.

Since I replaced my radiators with fan coil units and dropping my flow temperature down to 32c it was short cycling a lot. Managed to balance my pumps got better run time, turned my max flow temperature to 35c and now getting 4 hours run times. I don’t know why but my grant aerona3 doesn’t like super low temperatures.

Good job I swapped over to octopus cosy this morning! I’ll swap back in April.

Just checked no it doesn’t. So 18.4p/kWh including VAT. 19.40p/kWh standing charge and VAT. Which isn’t bad since I’ve used 9000kWh