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Frequently Asked Questions
What does an indoor unit contain?
A coil, a fan, a filter and an expansion device.
The expansion device meters refrigerant.
It responds to what that space is asking for.
All units share the same pipework.
Each controls itself independently.
How is the form chosen?
By what the space can physically accept.
Ceiling void depth rules options in or out.
Exposed structure changes the answer entirely.
Performance differences between forms are modest.
Capacity is matched after the form is settled.
When does a cassette suit?
When the ceiling void is deep enough for it.
It discharges in several directions at once.
That gives even distribution in an open area.
Only the grille is visible below.
A shallow void rules it out.
When is a ducted unit the better answer?
When the unit must disappear entirely.
It can serve more than one area.
Grilles are positioned wherever they suit.
Space for ductwork is required.
So is a route to reach it.
Where do wall-mounted units fit?
In refurbishment, and where there is no void.
Nothing above the ceiling is disturbed.
Installation is quicker and less invasive.
The unit is visible in the room.
Condensate still has to be routed away.
What does condensate require?
A route away from the unit with a fall.
Where that is unavailable, a pump is fitted.
A pump has a service life of its own.
It sits above a ceiling, so access matters.
Failures show up as damage below.
Why does sound need checking at selection?
Because it is generated in the occupied space.
Outdoor equipment noise is a separate question.
Quoted figures vary with fan speed.
Use the speed the unit will really run at.
Quiet rooms need this checked before ordering.