Split Air con

[reef]

Appreciate the inisght, sounds we like we got near identical system. Here is my real life use case.

In winter, use the 5kw system to heat up my open plan kitchen/dinner. Are we saying that will be use 700watts of electricity if cooling, how about heating ? Whilst if I use the 2.5kw unit, it will use 1kw in heating mode

I only plan to use the smaller unit in summer as they are on first and second floor so it’s get really hot on south facing side.

Also I am thinking of adding a 3.5kw (outdoor unit can connect 4) to heat up my loungue in winter so in reality (in future) I will be using the 5kw and 3.5kw to heat my ground floor - which I assume will make it much more efficient now.

Would appreciate your thoughts. (Wish I had known some of this at purchase!)

We have the 5kW unit in the kitchen/diner too, but have only used it exclusively for cooling as that room is always warm due to being south-east facing and has floor to ceiling windows and bi-fold doors along the entire length. It will run at 700w cooling most of the time, perhaps up to 1.2kW when running flat out. The 2.5kW units are in the living room and main bedroom upstairs. All three going in cooling mode uses about 2kW most of the time in summer. I only really run the living room one in heating mode as it's a pain in the backside getting it up to temp with our A2W Daikin as the microbore pipework doesn't allow a radiator any bigger. That living room unit uses about 1kW when heating steadily (more on initial startup).

I know all three together use under 2.5kW when heating as I did this during a free energy session last year.

Bear in mind these are only rough figures, as outdoor temperature affects ASHP energy use massively.

In general, the more units you use at once the better efficiency you'll get and this efficiency is also affected by outdoor temp.

 

[devil84]

We have the 5kW unit in the kitchen/diner too, but have only used it exclusively for cooling as that room is always warm due to being south-east facing and has floor to ceiling windows and bi-fold doors along the entire length. It will run at 700w cooling most of the time, perhaps up to 1.2kW when running flat out. The 2.5kW units are in the living room and main bedroom upstairs. All three going in cooling mode uses about 2kW most of the time in summer. I only really run the living room one in heating mode as it's a pain in the backside getting it up to temp with our A2W Daikin as the microbore pipework doesn't allow a radiator any bigger. That living room unit uses about 1kW when heating steadily (more on initial startup).

I know all three together use under 2.5kW when heating as I did this during a free energy session last year.

Bear in mind these are only rough figures, as outdoor temperature affects ASHP energy use massively.

In general, the more units you use at once the better efficiency you'll get and this efficiency is also affected by outdoor temp.

Thank you. Yes i also have bi-fold doors along the entire length. When you say it’s running 700kw/1.2kw flat out - is that the only unit running. That’s quite efficient for a 5kw unit?

So it sounds like it’s better to run the air con at a steady rate rather than trying to turn it on/off every 2 hours. Do you only turn it off when you of the house then?\

Did your installer attach it to the main ring or did they upgrade the fuse board?