A2A quote for aircon

BuildTheWall

Asked a local company for a quote on installing aircon for two bedrooms as the newbuild house gets too hot and the windows dont face the direction of wind in the summer. 
To avoid installing ugly outdoor units for regular air con, as the windows open on to the road in front, the surveyor suggested installing an air 2 air source heat pump with the outdoor unit facing the garden and routing the pipes through lofts to the bedrooms. The quote is £3.5k including a worcester bosch Multi Split CL50000i 5.3kw outdoor unit and 2x2.6kw indoor units for Bedroom 1 and Front Bedroom. 
1) does the quote sound reasonable?
2) the quote says it can be used for heating in the winter. how would that work with a A2W heat pump i also plan to install? if we dont use the other rooms (mostly in ground floor), can I turn off the A2W heat pump and use this instead?

QrizB

I have no knowledge of Worcester Bosch A2A heat pumps.

BuildTheWall said:

The quote is £3.5k including a worcester bosch Multi Split CL50000i 5.3kw outdoor unit and 2x2.6kw indoor units for Bedroom 1 and Front Bedroom. 
1) does the quote sound reasonable?

Yes, that sounds reasonable to me. @danrv paid double that for a larger system with 3x indoor units back in 2021. Thread here, install photos on page 6.

BuildTheWall said:

2) the quote says it can be used for heating in the winter. how would that work with a A2W heat pump i also plan to install? if we dont use the other rooms (mostly in ground floor), can I turn off the A2W heat pump and use this instead?

@danrv installed his primarily for heat, to replace his storage heaters. @Martyn1981 has A2A units that supplement his main heating system. You might find you don't need the A2W for most of the year, and can fit a much smaller one when taking the A2A units into account. You might even not need the A2W at all.

Rodders53

Get alternative quotes and options from others including other brands of aircon... Daikin, Mitsubishi Electric, Mitsubishi Heavy Industries et al... Different installers have different brand loyalties and discounts.  W-B is a new one on me.

You will need Planning Permissions for the A-A in addition to an A-W heat pump... even if the latter unit is permitted development.

You are unlikely to use heat in a bedroom in autumn / winter. Heat from downstairs will naturally get upstairs and most don't want bedrooms too warm.  Even if you fit no radiators in those rooms the A-A will be used very little I'd have thought.  We've been known to run our bedroom unit on cool in the winter if we forget to close the door to get the temperature down for sleeping.

Investigate the relative cost of in-ceiling aircon vents as opposed to wall mount split units in the bedrooms if that is feasible.

wrf12345

A single A2A unit is anywhere between £750 to £1500 supplied and installed, depending on where you live in the UK (London being the most expensive area) and the quality/size of the unit. You are allowed two under permitted development so may be better to go that route.