warm, from the floor up
Turn the house down.
[air, moving slowly]
Warm air from the floor rises past the cold window and turns over slowly, so your feet and your face sit within a degree or so of each other.
Temperatures and speeds in the room are illustrative, drawn for this page.
Ducted and split heating and cooling for homes in St Peters, Walkerville and the inner north-east. We size every room and make the ducts wide enough that the air moves slowly, so you feel it and never hear it.
Small ducts. Fast air. You hear it in every room.
The whoosh at the grille. The fan on high to make up for it. A cold fall of air from the wall onto the back of your neck.
None of that is the box’s fault. It’s the size of the pipe the air has to squeeze through.
[the hiss, fading]
Why ours are quiet.
The same warmth through a wider duct moves slower, and slow air makes almost no sound. Pick a room, then drag the duct.
This living room needs about 2.6 kW, so about 216 litres of air a second. Through a 250 mm duct it travels at 4.4 metres a second and loses 1.0 pascal every metre. At the grille, you’d notice it only in a quiet room.
Squeeze it into 150 mm and the same air has to run at 12.2 metres a second, about 22 dB louder at the grille.
Every load, speed and noise figure here is illustrative and drawn for this page. Your house gets its own numbers at the first visit.
This line is 100 millimetres long at the drawing’s scale.
[a tape measure, a pencil]
From the first visit to the day we go quiet.
[the house breathing out]
The slot is about 20 millimetres wide. That’s all you’ll see of it.
A bedroom isn’t a living room.
Every room gets its own figure: how much west glass it has, how high the ceiling is, who sleeps there and where the afternoon sun lands. Then its duct and its outlet are sized for that room and no other.
A bedroom is sized for still air at night, not a fast pull-down. It warms or cools a little ahead of bedtime, then holds there so quietly you forget it’s on.
[a wattlebird next door]
Where the noise goes.
The return lives in the hall ceiling, where you walk rather than sit. Air comes back to it under the doors, so doors don’t slam.
Duct runs keep clear of the ceiling over bedrooms where they can.
The outdoor unit goes on the side away from bedroom windows, off the neighbour’s fence line, on its own pad with a clear side. We show you where before we drill.
[a clock in the hallway]
We come back each autumn.
We service what we install. Once a year, before winter, we clean the filters and the return grille, check each collar, balance the rooms again and listen at every grille. It’s the same people who drew your ducts. If you’d like a second visit before summer, we’ll book that too.
[rain on the roof, far off]
Where we work
We work in St Peters, Walkerville, Joslin, Marden, Royston Park, College Park, Hackney, Medindie, Gilberton, Vale Park, Maylands, Felixstow and Payneham, and the streets between.
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