Electricty connection required for an air to air heatpump

[Mocame]

I am installing an air to air heat pump in a modestly sized dwelling (80 sq m) I am rennovating for a relative. I put all of the details into the ESB networks calculator and it concluded that I need a single enhanced connection (16 KVA), which is the type usually used for a farm or a dwelling with a very large heat pump. Can this be correct?

 

[S class]

What is the maximum KW demand from the heat pump ?

I had 9 KW of storage heating for 20 years from a standard domestic connection. This was a constant 9KW for the full 9 hour off peak period.

Your heat pump won't constantly draw it's maximum rated KW demand.

Alongside this I also ran all the water heating, dishwasher, tumble dryer and washing machine at night. These were all switched in at different time intervals. Water heating for a few hours and then domestic appliances for another few hours.

This never caused any problems. Never blew my 63 Amp main fuse.

 

[Marsupial]

I am installing an air to air heat pump in a modestly sized dwelling (80 sq m) I am rennovating for a relative. I put all of the details into the ESB networks calculator and it concluded that I need a single enhanced connection (16 KVA), which is the type usually used for a farm or a dwelling with a very large heat pump. Can this be correct?

I can't say whether or not it's correct, but when I was building my new, all-electric retirement bungalow (heated by an air to water heat pump) about 15 years ago, the ESB made me install a 16 KVA connection. And, at the time, my Heat Pump installer confirmed that that was the correct spec.

 

[lff12]

Can this be correct?

Possibly. Don't forget that most A2A heat pumps (with a few high end exceptions) don't include hot water so you need to include allowance for up to 3kw hot water electric boiler running at the same time, and potentially other household appliances or an EV charger running at the same time.