Air curtains that keep the cold in with the door open.

Air curtains for store entrances, cool room doors, freezer openings, docks and service windows, sized to the opening and set up on site.

Ask for an air curtain quote Call 1300 075 075

A white air curtain unit, as mounted over a door

2.0 m/s: Jet speed at 150 mm above the floor, ASHRAE 90.1
20 degrees: Minimum discharge angle towards the opening
About 7 m: Highest openings the industrial families cover

Nextage supplies and installs air curtains across Australia for store entrances, cool room and freezer doors, loading docks and service windows. An air curtain blows a sheet of air across an opening that has to stay open, so cold air stays in and warm air stays out without a door. Each unit is sized to the width and height of the opening and set up on site, because a jet that does not reach the floor at the right speed and angle does little.

The problem

Cool room doors propped open let cold air fall out across the floor.
Entrance doors held open let the air conditioning out and the weather in.
A curtain that was never set up after fitting runs all day and barely works.

What's included

A measure of each opening: width, height and what passes through it
The unit family and size that suits that opening
Mounting, power and controls organised with the electrician
Commissioning: jet speed and angle set on site with a meter
Before and after photos

Public liability insurance: $20 million.

Range

Air curtain families

A dock door and a service window are different problems, so the family is chosen for the opening.

Entrance, unheated

Air only, for air conditioned shopfronts, mounted over the door.

Entrance, heated

Electric or hot water heating in the air path, for cold climate entrances.

Cool room doors

Higher jet speed, stepless speed control and adjustable vanes, the retail back of house workhorse.

Freezer openings

Higher pressure units, sometimes two with opposed jets, for sub zero doors.

Industrial and docks

Three phase families for roller shutters and dock doors up to about 7 m high.

Insect control

Built for the jet speeds NSF/ANSI 37 asks for at food premises openings.

Service windows

Compact units for pass throughs and small back doors.

Recessed

Units that sit in the ceiling void with only the grille showing.

Stainless and washdown

For wet, salty or food processing areas.

Vertical

Jamb mounted units for openings with no head height above.

Illustration: an open cool room door exchanging warm and cold air, beside the same door with an air curtain jet reaching the floor

Specification

What sets one up properly

The figures an air curtain is judged against.

The service page shows the readings from a cool room door we measured, and what changed once the jet was set.

Jet speed: At least 2.0 m/s at 150 mm above the floor (ASHRAE 90.1)
Angle: Discharge at least 20 degrees towards the opening
Test standards: ANSI/AMCA 220 or ISO 27327-1
Food premises: NSF/ANSI 37 jet speeds for insect control
Sizing: To the opening width and mounting height
Commissioning: Speed and angle set on site with a meter
Building code: Not named in NCC J5D5; the certifier decides

Supply and install

Supplied, ordered and fitted for you.

No products to order, fixings to buy or trades to chase. One call, and it arrives fitted.

Ask for an air curtain quote Call 1300 075 075

Tell us the site and roughly how many. We walk it and come back with a measured quote.

We measure
A site walk sets what goes where, and how many.
We order
The right product, size and quantity, delivered to site.
We organise
Access, inductions and timing around your trading hours.
We install and photograph
Fitted by our crews, with before and after photos when it is done.

Often fitted in the same visit

A good fit

Cool room and freezer doors that stay open while staff work
Store entrances held open in trading hours
Docks, roller shutters and service windows
One door, or the same unit across a whole fleet

Not a fit

An opening that can simply be kept shut with a self closing door
Meeting NCC J5D5 on its own: air curtains are not named in it, so ask your certifier

Photos

An air curtain, measured

An air curtain over a cool room door, and the readings taken at that door with and without it running.

An air curtain mounted over a cool room door in a bottle shop, the door standing open onto shelving inside the cool room

An anemometer on a speckled floor reading 2.09 metres a second and 18.6 degrees

An anemometer display reading 0.73 metres a second and 9.8 degrees, beside a measuring tape

An anemometer held up at shelf height reading 0.04 metres a second and 5.1 degrees

FAQ

About air curtains

What does an air curtain do?

It blows a sheet of air across an open doorway so cold air stays in and warm air stays out, without a door being shut. It suits openings that have to stay open while people and stock move through.

How do you size an air curtain?

To the width of the opening and the mounting height, so the jet still reaches the floor. ASHRAE 90.1 asks for at least 2.0 m/s at 150 mm above the floor with the discharge angled at least 20 degrees towards the opening.

Does an air curtain meet the NCC?

NCC J5D5 lists airlocks, self closing doors, rapid roller doors, revolving doors and the like. Air curtains are not named in it, so your certifier decides whether one is accepted.

Can one go on a freezer door?

Yes, with a higher pressure family built for sub zero openings, sometimes two units with opposed jets, and a plan for where the moisture goes.

Which brand do you fit?

The unit is chosen for the opening from the families on this page, and the quote names the model.

Refrigeration & door energy efficiency

Aerofoil blades on refrigeration cabinets and air curtains at cool room and entry doors. Measured on site before capital is committed, then staged across the estate.