Air to air heatpump
most air to air heatpumps are reversible air conditioning systems
the manufacturer makes both the heat source, the controls and the heat sink (the emitter of heat).
But with an air-to-water heat pump system a manufacturer is only involved with manufacturing the heat source and not the heat sink e.g. they donât make the radiators.
TipsÂś
- You donât need an internal unit in every room or where you currently have a radiator - A2A blows warm air through the house, especially useful if you have corridor or open plan layouts.
- The floor based units seem noisier / blowier (but still quiet TBH) than the wall ones - maybe because the wall ones are further away though?
- You can have more -or- less kW capacity on external vs internal multisplit - but there are limits / rules etc.
- You canât really put an A2A inside unit in a bathroom - so need IR panels or electric immersion radiators etc with their own control system.â
- Control is by default - not good - expect to pay extra or add on Control on A2A is generally bad - its, by default, based on IR remotes for each inside unit - a far cry from a zoned timer system and you risk a proliferation of clocks through the house or dependency on apps and all the layers of software and network that need to work to keep them happy.
- 100% Research the wired options for control - especially if you can pickup and self install those parts after the difficult A2A install itself.
- Location
The installers like to put the units on outside walls (generalism) - but can be persuaded otherwise just needs a little planning and legwork to keep their lives inside their comfort zone while also getting what you need. - Google searches that I found useful:
- BTU to kW
<model> install pdf<model> user pdf<make or make multisplit> combination pdf
- Sometimes it picks up australian documentation or European - if so can be a guide if not completely accurate - âdepends who left documents publically available