Roof ventilationget the hot air out

Wind-driven vs solar-powered

A wind-driven ventilator — a whirlybird — spins on the breeze and draws warm air out of the roof space. It has no running cost, nothing to wire and nothing to fail electrically. On a breezy coastal site it does a genuinely useful job.

A solar-powered ventilator runs a fan off its own panel, so it works hardest exactly when you need it: a still, blazing hot afternoon with no breeze at all. That is the day a whirlybird sits motionless. For workshops that get used through summer, solar units are usually the better answer.

• Spinaway® wind-driven: no power, no running cost, works with the breeze
• MaxBreeze® solar: powered extraction on still, hot days
• Both can be combined across a larger roof
• Ventilator count is set by the floor area and roof pitch, not by guesswork

Air has to get in as well as out

A ventilator can only exhaust as much air as the building lets in. If the shed is sealed tight, the ventilator starves and you get very little movement. Low-level intake — wall vents, louvres, an open window, or gaps designed into the build — is what makes the ridge extraction actually work.

We plan intake and exhaust together, which is why ventilation, windows and door positions get discussed in the same conversation.

Why Ampelite and MaxBreeze

Ampelite Australia manufactures the Spinaway® range and is a long-established Australian supplier of roofing and ventilation products, so replacement parts and support exist locally. MaxBreeze solar units give us a powered option that does not need an electrician or a circuit run to the roof.

Both are specified and flashed into the roof as part of the build, so the penetration is detailed properly rather than cut in afterwards and sealed with hope.