A2A Heat Pump Usage

[Caddy]

Could anyone with experience in A2A heatpumps give me some advice if possible. Are you supposed to leave it running 24/7 like an A2W heat pump system with lower set-back temps for during the night and other times or are you ok to schedule it on/off as required, as the room heat up times are quicker that A2W? Thanks

[S2D2]

It depends how often you use the space I'd say. Efficiency when pushing the unit hard will drop but if the space is unused for a long time this will eventually offset and save more. I leave mine on 21/7 (cosy tariff) as I prefer the things in the house you're in contact with - seats etc to be at the right temperature, not just the air after a quick warm up blast. 

[RichardL]

A2A Personally I run the indoor units when I'm in that part of the house:

- Core of the house - on all day at the weekend, but only in the mornings during the week,
- Living room/home office all day when working from home - but on demand at the weekend,
- Bedrooms to top up in the evening until I sleep.

I'm coming from a background/habit of never heating the house overnight though, + insulated but moderately leaky house & combined with A2A units can heat up a room in 20-30 minutes personally don't see the need to keep them on 24/7.

It's a sort of 'depends' answer.

(Zones is a very loose concept in a house though - they all affect each other especially when you're heating by moving air)

Edited November 12, 2023 by RichardL