Aerofoils and air curtains, measured on site first.

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.

Product pages under this line

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Illustration: Refrigeration & door energy efficiency

More than 50: Sites fitted
About 20%: Measured cut in daily refrigeration energy

Refrigeration and door energy efficiency work covers Aerofoil blades fitted to open refrigeration cabinets and air curtains at cool room and entry doors, to reduce cold air spill and stabilise temperature. Nextage measures the doors and cabinets on site first, taking air velocity and temperature before and after, so the business case rests on that store's own readings rather than a supplier's brochure figure. Across the three products the scale runs from a few hundred kWh a year per freezer door to about 22,800 kWh a year on one large format store's cabinets, which is the figure Nextage measured itself. Delivered in every state and territory.

The problem

Every supplier quotes a saving percentage. None of them measured your store.
Cold air spills at open cases and doorways, and the plant works harder to cover it.
Finance will not fund a fleet wide retrofit on a manufacturer's brochure number.

What's included

Instrumented site assessment: air velocity and temperature at the door or case, in each operating state
A written site report with the readings and what they mean
Aerofoil blades specified to the cabinet type
Air curtains specified and set up for the opening, including lamella direction and speed
One frozen kit per cabinet or door type, priced per site
Staged installation and a completion report

Public liability insurance: $20 million.

Program shape

How the work runs

Same order every time. The order is what makes site 40 match site 1.

Each site closes with a completion report: photos before and after, the work performed, and the handover detail. How a national program runs

Measure
Attend and instrument the door or case. Readings before anything is fitted.
Report
The readings, in writing, with the conditions they were taken in.
Specify
Aerofoil profile or air curtain sized to that cabinet or opening.
Price per site
So the retrofit stages against the capital cycle.
Install and verify
Fit, commission, and remeasure so the change is evidenced, not assumed.

Product pages

Aerofoil, Air curtains and OVAGLAS films each have a page of their own

The detail that belongs to the product rather than the program: how it works, what the evidence actually says, and what it does and does not suit.

Aerofoil blades for open refrigeration cabinets

Shelf edge Aerofoils fitted to open refrigeration cabinets to hold the air curtain and cut cold air spill into the aisle.

Air curtains for retail and cool room doors

Air curtains at store entrances, cool room doors, back of house and dock openings. Sized to the opening, commissioned with a meter in hand, then priced per store.

OVAGLAS films for freezer doors and shopfront glazing

Clarifoil Anti-Fog Film for fridge and freezer doors, plus solar, coating and security film for shopfront glazing. Fitted to the glass you already have, aisle by aisle, in trading hours.

Cost and carbon

What each measure is worth, side by side

The same rows across the three products, so they compare on the same terms. Each product page shows its own inputs. Carbon is at the NSW and ACT factor for all three.

Per year	Aerofoil blades	Anti fog film	Air curtain
Unit	One large format store's open cabinets	One freezer door	One cool room door, open 4 hours a day
Where the kWh comes from	Measured by Nube iO, before and after, full year	Published industry and laboratory figures	Calculated, standard doorway method, inputs shown
Electricity avoided	About 22,800 kWh	788 to 1,112 kWh	1,157 to 3,047 kWh, net of the fans
Carbon avoided in NSW, at 0.64 kg per kWh	14.6 tonnes	0.50 to 0.71 tonnes	0.74 to 1.95 tonnes
Power cost avoided, at an assumed 25c per kWh	About $5,700	$197 to $278	$289 to $762

Only the Aerofoil column is a Nextage measurement. The film column carries other people's published figures and the air curtain column is arithmetic on a published method, and each product page says so. The units differ on purpose, because that is how each one is bought: a store's worth of cabinets, a door of film, one doorway. The 25c per kWh is a round number for the arithmetic, not a tariff.

Emission factors

Carbon depends on the grid behind the store

Location based scope 2 factors from Table 1 of the National Greenhouse Accounts Factors 2025, published by the Department of Climate Change, Energy, the Environment and Water. Multiply any electricity figure above by the factor for the state the store is in.

State or grid	kg CO2e per kWh
New South Wales and the ACT	0.64
Victoria	0.78
Queensland	0.67
South Australia	0.22
Western Australia, South West Interconnected System	0.50
Western Australia, North Western Interconnected System	0.56
Tasmania	0.20
Northern Territory, Darwin Katherine Interconnected System	0.56
National	0.62

The same saving is worth nearly four times the carbon in Victoria that it is in Tasmania.

A good fit

Multisite retail with open refrigeration cases or high traffic cool room doors
Groups that need a measured business case before committing retrofit capital
Estates where the same cabinet or door type repeats across many stores

Not a fit

Full refrigeration plant design or replacement
Electrical or mechanical services contracting
Anywhere a guaranteed savings percentage is required up front. We measure, we do not promise a number in advance

Run for: Convenience · Liquor · Supermarkets

Photos

An open wine case and a cool room door

Open refrigerated shelving loses cold air into the aisle, so Aerofoils fit along the shelf edges to keep it in the case. At the cool room, an air curtain above the door holds the cold in each time the door opens.

Open refrigerated wine case in a bottle shop

FAQ

About refrigeration & door energy efficiency

Do you guarantee a percentage saving?

No. Suppliers quote generic figures; we measure your door or cabinet on site, before and after, and report what we actually recorded. A number that did not come from your store is not a business case.

How much energy and carbon do these measures save?

On the figures on this page: about 22,800 kWh and 14.6 tonnes a year for Aerofoils on one large format NSW store, measured by Nube iO; 788 to 1,112 kWh a year per freezer door for anti fog film, on published industry figures; and 1,157 to 3,047 kWh a year net for an air curtain on a cool room door open four hours a day, calculated. Carbon depends on the state: the same kWh is worth nearly four times as much in Victoria as in Tasmania. Only the Aerofoil figure is our own measurement, and none of them is a forecast for your stores.

What does the site measurement involve?

Air velocity and temperature readings at the opening, taken in each operating state (door closed, door open, and with the unit running) at set distances and heights, so the before and after are comparable.

Do air curtains really work?

They work when they are set up. In the published test our air curtain page relies on, the same unit on a cold store door measured an effectiveness of 0.31 as the installer left it and 0.77 once the jet speed and angle were set. That is why we take readings at the door after fitting.

Does an air curtain meet the NCC rule for a shop entrance?

Not by name. NCC 2022 clause J5D5 requires an entrance to a conditioned space to have an airlock, a self closing door, a rapid roller door, a revolving door or the like, and it does not name air curtains. Ask your certifier before relying on one for that clause. The air curtain page sets out the clause and its exceptions.

Is there a rebate for Aerofoils or air curtains?

Not one written for them. The NSW refrigerated cabinet activity, under the Energy Savings Scheme and the Peak Demand Reduction Scheme, is for installing a new cabinet or replacing an existing one, and Victoria's refrigerated cabinet activity is likewise about the cabinet. Shelf edge blades, anti fog film and doorway air curtains are not cabinets, so the business case rests on the measured saving.

Is this refrigeration contracting?

No. We specify, supply and install Aerofoils and air curtains as a repeatable multisite pack. Plant design, replacement and refrigeration services contracting are somebody else's trade and we would say so.