On Thu, 24 Dec 2009 17:12:32 +0000, Dave Osborne wrote:

wrote:
Hi group,

I am considering installing two 12kw air source heat pumps to replace
my old oil fired boiler.

The trianco activair units quote a start up current of 23amps which
then drops to 17.7amps for normal operation.

Question.

Will a modern 100amp consumer unit be able to handle this?

Yes, it's only the same as a smallish electric shower.

but don't be surprised if you notice the lights dim/flicker a little on starting, especially if
you're towards the end of the line