Door Automation Explained: Types, Safety and Cost Drivers

Door automation is the difference between a doorway people have to handle and one that simply lets them through. On a busy entrance it removes a bottleneck; in a clinic it removes a contact point; in a cold store it removes the time the door spends open. This guide covers what door automation involves on a commercial building in South Africa, which doors suit it, and what decides the price.

What door automation means here

We use the term for pedestrian entrances: sliding, swing, telescopic, revolving and hermetic doors that people walk through. In South African search results the phrase is often mixed up with driveway gates and garage doors. Those are a different trade with different equipment and different safety rules, and we do not do them. Everything below is about the doors in and around a building that people use on foot.

The operator is the part most people picture, but it is the sensor arrangement and the commissioning that decide whether the entrance is pleasant or irritating to use. A well-specified system disappears into the building; a poorly set one gets propped open within a month.

Which doors suit automation

Almost any sound pedestrian door can be automated, but each type solves a different problem.

Sliding entrances handle the bulk of retail, office and clinic traffic. Swing operators are the usual answer for door automation on an existing hinged leaf, which makes them the retrofit choice and the accessibility choice. Telescopic leaves buy clear width where there is little side room. Revolving entrances keep conditioned air in a tall lobby. Hermetic doors seal as they close, which is why they appear in theatres, laboratories and cold-side openings.

If the leaf itself is failing, automation is the wrong first spend. A door that drags, binds or has tired hinges will fight the operator, and the operator will win for a while and then fail. We say so at survey rather than afterwards.

How the right system is chosen

Four questions settle most specifications, and they are asked in this order: what traffic does the opening carry, what clear width does the building actually need, what is the environment doing, and is this an escape route? Door automation on a fire escape route is governed by break-out and fail-safe behaviour, not by preference, so that answer changes the hardware before anything else is priced.

Traffic is the one most often guessed. A shopping centre entrance can pass more cycles in a month than an office door does in a year, and that difference decides the operator size, the service interval and eventually the lifespan of the drive. Counting people for an hour at the busiest time is worth more than an estimate.

Safety is the part people underestimate

An automated leaf moves through space that people stand in, so the safety arrangement is not an accessory. Activation sensors see somebody approaching. Presence sensors see somebody who has stopped in the opening: a child looking at something, a wheelchair being turned, a trolley half through. Both are needed, and on every quotation we list them individually instead of hiding them inside a package price.

Force, speed and sensor coverage are set on site during commissioning, against the relevant South African standards published by the SABS. Obstruction behaviour is tested with an object rather than read off a controller screen. If you have an existing automated entrance and nobody has tested that since it was installed, it is worth booking a service visit to confirm it still reverses as it should.

What door automation costs depend on

There is no single price, and any supplier quoting one without measuring is guessing. Leaf weight and width come first, because they decide the operator. Leaf count comes next, then the sensor arrangement, then anything to do with power backup and locking, then the state of the site itself. Our cost guide works through those drivers in detail.

Two things are worth budgeting for that buyers often leave out. The first is making good around the opening once the old frame is removed. The second is the service interval, which is an operating cost rather than a capital one and is what keeps the entrance out of the repair cycle.

Retrofit or new entrance

Retrofitting door automation to an existing doorway keeps the structural opening, often the frame, and sometimes the leaves. It is the cheaper and faster route where the structure is sound. A new entrance gives free choice of clear width and system, and it is the honest answer when the header cannot carry an operator, the opening is out of square or the leaves are past saving.

There is a third case: an entrance that is already automated but running on an obsolete controller. That is modernisation, where the header stays and the working parts are renewed. It is usually better value than replacement, and we will tell you when that is what you are looking at. Our post on automating an existing door covers the retrofit decision in more depth, and the sliding door automation kit article explains what is inside the header.

Living with an automated entrance

Door automation is not fit-and-forget. Belts stretch, rollers wear, floor guides fill with grit and sensors drift out of aim. None of that is dramatic, and all of it is cheap to correct on a planned visit and expensive to correct after a failure on a Saturday morning. Service intervals should follow the cycle count rather than the calendar.

Power interruptions deserve a decision rather than a shrug. Battery backup, fail-safe or fail-secure behaviour and manual release are specified before the order, because each one changes what is fitted inside the header. Staff should be shown the manual release on handover, and shown it again when the people who were there at handover have moved on.

Door automation by sector

The same equipment is specified differently depending on what the building does, and the differences are worth knowing before you compare quotations.

Retail. Footfall is uneven: long quiet periods and sharp peaks at opening, lunchtime and close. Door automation here is sized for the peak, not the average, and the hold-open time is set so a queue does not trigger repeated cycling. Trolleys and prams make presence sensing across the threshold essential rather than optional.

Healthcare. Hands-free entry is the point. Clinics and hospitals also need entrances that behave predictably for people moving slowly, on crutches or in wheelchairs, which usually means slower closing speeds and longer hold-open times than a retail entrance would use. Where infection control matters, hermetic doors seal as they close.

Cold storage and food. Every second the opening stands open costs energy and risks condensation. Door automation is specified for fast, reliable cycling with seals that suit washdown, and the control arrangement usually ties into the building rather than standing alone.

Offices and reception. Access control drives the specification more than traffic does. Readers, interlocks and free-exit devices are integrated at the header, and the entrance must still release correctly in an emergency.

Education and public buildings. These entrances take rough use and heavy traffic in short bursts. Robust hardware and a realistic service interval matter more than a refined specification, and the manual release has to be something any staff member can operate.

Common mistakes when buying door automation

Four mistakes account for most of the door automation we are called out to fix, and none of them are the equipment’s fault.

• Buying on the total only. Two quotations for the same doorway can differ by a third because one has specified presence sensing and an operator matched to the leaf, and the other has not.
• Treating the survey as a formality. The measurements are what protect you when the opening turns out to be out of square; door automation priced from a photograph gets corrected on site, usually at your cost.
• Ignoring the escape route question. If the entrance sits on one, the answer changes the hardware. Retrofitting break-out behaviour afterwards is far more expensive than specifying it up front.
• Skipping servicing to save money. A planned visit costs a fraction of an emergency call-out, and almost every failure we attend was visible as wear months earlier.

There is a fifth worth adding: choosing a supplier who does not service what they sell. Door automation is a long-lived installation, and the value of the relationship shows up in year three, not in the week the quotation arrives.

Quick answers

• What it covers: pedestrian sliding, swing, telescopic, revolving and hermetic entrances.
• What it does not cover: driveway gates and garage doors, which are a separate trade.
• Retrofit: most sound hinged or sliding doorways can be automated without rebuilding the opening.
• Safety: activation plus presence sensing, tested with an object at commissioning.
• Escape routes: break-out or fail-safe behaviour is decided before the order.
• Price drivers: leaf weight and width first, then leaf count, sensors, backup and site condition.
• Lead time: quoted separately from the site work so trading sites can plan.
• Warranty: 24 months on the operator; wear parts quoted separately.
• Servicing: interval set from real cycle counts, not a fixed calendar.
• Other suppliers’ doors: we service them, starting with a condition survey.
• Coverage: installed and serviced across South Africa from Johannesburg.
• Where to start: opening size, a photograph and an idea of daily traffic.

A short glossary

Quotations use these terms as though everyone knows them, so here they are in plain language.

• Operator. The drive unit that moves the leaf. In door automation it is the component that dictates what weight and width the entrance can carry.
• Leaf. The moving panel itself, whether glass, aluminium or timber.
• Clear passage width. The gap people actually walk through when the door is fully open, which is always less than the structural opening.
• Activation sensor. Detects approach and starts the cycle.
• Presence sensor. Detects somebody stationary in the opening and holds the door.
• Hold-open time. How long the entrance stays open after the last detection.
• Break-out. The ability to push the leaves open by hand in an emergency, required on many escape routes.
• Fail-safe and fail-secure. Whether the entrance unlocks or stays locked when power is lost.
• Commissioning. Setting speed, force and sensor coverage on site, then recording it.

If a door automation quotation uses none of these terms, it has not been written from a survey. If it uses all of them, you can compare it line by line with anybody else’s.

Frequently asked questions

Getting a quotation

Send the opening size, a photograph of the doorway and an idea of daily traffic, and we will tell you which system fits and what the work involves. If your doorway does not need door automation at all, that answer is free too. Request a quote or call 010 412 0062.