No they are not at all.
Although modern electric garage doors are highly efficient, they require very little energy to operate.
This makes them incredibly efficient and therefore environmentally friendly and cost-effective. Opening or closing garage doors takes about 15 seconds. While the electric door drive remains in standby mode during this time, its energy consumption is absolutely minimal.
Let's break it down with a specific example. The Hörmann BiSecur SupraMatic E garage door opener has a power rating of 0.2 kW. Assuming an electricity price of 3.50 CZK/kW, opening and closing the door will take a total of 30 seconds, costing you 0.006 CZK per cycle. So, if you open and close the garage on average three times a day, it will cost you less than 7 CZK per year.
Now, let's talk about energy consumption in standby mode, during which the Hörmann door opener consumes about 1 watt. If the door opener were in standby mode for a year, the cost of its electricity consumption would be 31 CZK. One year of normal automatic garage door operation, in terms of electricity consumption, comes out to barely 40 CZK. For comparison, operating one LED bulb with a power consumption of 15 W (equivalent to a regular 100 W bulb) that will be on for 5 hours a day will cost you 96 CZK per year.
There's no need to look for further arguments... The example above clearly demonstrates that automatic garage doors don't consume much electricity.
If you want to learn more about garage doors, check out other myths debunked as well.