Do Automatic Doors Save Energy? How They Cut Heating & Cooling Costs

Heating and cooling a building is expensive, and the front door is one of the biggest places that energy escapes. So a fair question before you invest is: do automatic doors save energy? The short answer is yes — a well-set-up automatic door helps automatic doors save energy by opening only when someone approaches and closing straight after, so the doorway spends far less time standing open. That means less conditioned air lost and less outside air pulled in. This guide explains how automatic doors save energy, and how to get the most efficiency from yours.

How do automatic doors save energy?

A manual door left open, propped open on a busy day, or slow to close, leaks heated or cooled air continuously. An automatic door removes that problem: it opens on approach, stays open only as long as it needs to, and closes reliably every time. Because the opening is exposed for a shorter period and never accidentally left ajar, less warm or cool air is exchanged with outside. Tight brush seals and weather seals around the panels reduce draughts further, and the opening width and hold-open time can be tuned so the door isn’t open wider or longer than necessary.

Reducing heating and cooling loss

Every time a doorway opens, conditioned air escapes and untreated outside air rushes in, and your heating or air-conditioning has to work harder to recover. By minimising how long and how often the opening is exposed, automatic doors help keep that conditioned air inside, easing the load on your HVAC system. In a shop, office or clinic with steady foot traffic, that steadier indoor temperature is both more comfortable for people and easier on running costs.

Opening speed, hold-open time and sensors

A lot of an automatic door’s efficiency comes down to settings. A brisk, well-judged opening speed and a short hold-open time mean the door closes promptly once someone is through, so it isn’t standing open longer than needed — see our guide to opening speed and safety settings. Correct sensor setup matters too: sensors should trigger for genuine approaching traffic, not for people simply passing by, so the door isn’t opening for no reason. Getting these right is one of the simplest ways to make automatic doors save energy.

Revolving doors and air curtains for high-traffic entrances

For very busy commercial entrances, the layout itself can cut energy loss. An automatic revolving door is designed so the building is never fully open to outside — there is always a wing between inside and out, which limits the exchange of air even with constant traffic. An air curtain, fitted above the opening, adds a stream of air that helps hold the indoor climate in when the door is open. Both are worth considering where doors cycle all day long.

Getting the most efficiency from your automatic doors

An automatic door only saves energy if it keeps closing properly. Worn seals, a door that hangs open, mis-set timing or a faulty sensor all undo the benefit. Regular servicing keeps the seals tight, the closing reliable and the settings correct. Our parent company, MC Automations, installs and services automatic entrances across South Africa and can set opening speed, hold-open time and sensors for efficient, comfortable operation. For general energy-saving guidance, see Eskom.

Frequently asked questions

Related reading: automatic doors in South Africa, automatic doors during load shedding, and automatic door maintenance checklist.

Do automatic doors save energy compared with a door propped open?

This is where the difference is largest. A propped-open entrance leaks conditioned air continuously; a powered one is shut whenever nobody is passing through. So yes — do automatic doors save energy against a door left standing open, comfortably. Against a well-used manual door the saving is smaller and comes mostly from shorter open time, which is why hold-open settings matter when people ask do automatic doors save energy.

Do automatic doors save energy: getting a quote

If you are asking “Do automatic doors save energy?” for your own entrance, MC Automations, our parent company, can help: it supplies, installs and services automatic doors. To quote accurately, we need to know:

• The opening. The width and height of the clear opening, with photos of the existing frame or shopfront.
• Sliding or swing. The MC-125 automatic sliding door system is R27 590 and the MCW-100 swing door operator R15 900, excluding VAT.
• Traffic. How many people use the entrance, and whether trolleys, prams or wheelchairs pass through.
• Power. Whether there is a power point near the head of the door.
• Installation. Installation is included in Gauteng; outside Gauteng it is quoted per project.
• Service and warranty. We recommend a service every six months, and the operator carries a 24-month warranty.

Questions about whether automatic doors save energy? Call 010 412 0062, WhatsApp photos to 076 613 4418, or price an automatic door in the online estimator.

Where automatic doors save the most energy

The honest answer to “do automatic doors save energy?” depends on how the entrance is used. The saving comes from the door spending less time open than a manual door that people prop open or leave ajar, and that matters most in a few situations:

• Air-conditioned shops and offices on busy streets, where a propped-open door lets cooled air out all day.
• Clinics, pharmacies and hospitals, where a stable indoor temperature matters for patients and stock.
• Buildings on the Highveld in winter, when warm air escapes every time a manual door is left open.
• Entrances with heavy foot traffic, where people tend to wedge a manual door open rather than push it every few seconds.

In each of these cases automatic doors save energy because they open only when someone approaches and close again as soon as the opening is clear.

What cancels out the saving

An automatic door is only as efficient as its settings. These are the details we check before telling a client that their automatic doors save energy in practice.

A hold-open time that is too long

If the door waits several seconds after the last person has passed, most of the benefit disappears. The hold-open time is adjustable at commissioning and can be shortened for quieter entrances.

Sensors that open the door for passers-by

A motion sensor aimed too far onto a pavement or corridor opens the door for people who are only walking past. Re-aiming or narrowing the detection field keeps the door closed until someone is actually heading for it.

The wrong door type for the traffic

A single sliding door on a very busy entrance can stay open almost all day. Bi-parting doors open and close faster for the same opening, and in high-traffic lobbies a revolving door keeps an airlock between inside and outside.

A quick checklist for energy efficient automatic doors

• Choose the door type to suit the traffic, not only the size of the opening.
• Ask for the hold-open time and the opening speed to be set for your entrance at commissioning.
• Make sure the sensors are aimed at the approach path rather than the pavement.
• Specify good seals and brush strips on the leaves and the track.
• Keep the door serviced so that the seals, sensors and settings stay as they were commissioned.

Energy efficient automatic doors are mostly the result of these details. Tell us how your entrance is used when you ask for a quote and we will set the door up to match.

An example: a busy pharmacy entrance

Picture a pharmacy on a main road with the air-conditioning running all day. With a manual door, staff often wedge it open on busy mornings so that customers do not have to push it, and cooled air spills onto the pavement for hours. Swapping that door for an automatic sliding door changes the pattern completely: the door opens as each customer approaches, closes a few seconds after they pass and stays shut between visits.

Nothing about the building has changed, yet the entrance now spends most of the day closed instead of open. That is the practical reason automatic doors save energy in shops like this one. To keep the benefit, the sensors are aimed at the approach path so that people walking past on the pavement do not trigger the door, and the hold-open time is set short enough for the flow of customers.

Every entrance is different, so we always ask how many people use the door and when it is busiest before recommending a door type and its settings.

If you already have an automatic door and suspect it is wasting energy, the fix is often a service visit rather than a new door. Re-aiming the sensors, shortening the hold-open time and replacing worn brush seals can restore most of the original performance, so ask us to check the settings the next time your door is serviced.

Budgeting for automatic doors? How They Cut Heating & Cooling costs

Opening width, glass specification, sensor layout and access control are what separate one quotation from another, so compare them line by line rather than on the total alone. A free site measure confirms the opening, the power supply and the traffic before we commit to a fixed price, and the standard glazing is 6.38 mm laminated safety glass.

Sensors, safety and commissioning

An entrance is only as good as its sensors. Motion sensors open the door as somebody approaches and see movement rather than a standing person; presence sensors hold it open while somebody is in the opening, which is what stops a door closing on a person who has paused. Safety beams and a force limit reverse the leaf if something is in the way.

Commissioning sets opening and closing speed, hold-open time, force and the safety zones either side, and the settings are written down at handover so anyone adjusting the door later can see what it was signed off at.

Servicing, spares and call-outs

We recommend a professional service every six months, with more frequent visits for very busy entrances such as malls. A visit checks and realigns the sensors, inspects the belt, rollers and guides, re-checks opening and closing force, and replaces wear parts before they strand the door. Wear items are replaced as part of servicing rather than under warranty.

We stock the operators, sensors, drive belts and control boards we fit, so a repair does not wait on an imported part. Automatic doors are installed and serviced nationwide, with call-outs within 24 hours in Gauteng.

Can an existing hinged door be automated?

Usually yes. The MCW-100 swing operator fits an existing hinged door up to 1,200 mm and 150 kg (interdependent), with push-arm and pull-arm options.

What glass is used?

6.38 mm laminated safety glass as standard, with the framing powder-coated to suit the building.

Glass, frames and finishes

Standard glazing is 6.38 mm clear laminated safety glass, which holds together if it is ever broken and takes the edge off outside noise. Tinted and performance glass are available, quoted separately, where solar gain or privacy matters, and toughened glass suits frameless and low-level applications. The framing is powder-coated in the colour that suits the building, so an entrance reads as part of the frontage rather than something bolted on afterwards.

Upgrading an existing entrance

An existing doorway can usually be automated without rebuilding the frontage. A swing operator suits a hinged door that is staying put; a sliding installation replaces a tired frontage and gives a wider, cleaner opening. The deciding factors are the strength of the head, the squareness of the opening and the route for power.

When something goes wrong

Describe what the door is doing and a technician can usually name the cause before travelling: held open points to sensors or a detection zone problem, reversing points to an obstruction or force limit, and noise points to rollers, belt or guides. Because the operators, sensors, belts and control boards we fit are held in stock, most of those are fixed on the first visit.

What happens when we report a fault?

We take the symptom over the phone so the right part is loaded, then attend — within 24 hours in Gauteng and within 48 hours elsewhere.

Can we choose a different glass?

Yes. The standard is 6.38 mm laminated safety glass, and tinted, obscured or performance glass can be specified, and is quoted separately, where the frontage needs it.

Automatic doors in short

If you are pricing automatic doors, send the structural opening sizes and a photograph and we will specify the system, the sensors and the glass against the traffic the doorway really carries. Automatic doors are supplied, installed and serviced by one team, with spares held locally.

Ask us about automatic doors and we will confirm the opening, the power supply and the traffic flow before quoting a fixed price.

Automatic doors at a glance

• Pricing for automatic doors follows the opening width, the glass and the sensor layout.
• Ask us to confirm the opening before ordering automatic doors.
• Every enquiry about automatic doors gets a written specification, not a verbal estimate.