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Air curtains can be extremely efficient and allow doors to stay open. That sounds like an insane waste of money and energy if store owners are not using one - a
by ricardobeat 7y ago
Air curtains can be extremely efficient and allow doors to stay open. That sounds like an insane waste of money and energy if store owners are not using one - are you sure you're not just feeling the 10-20% lost cold air when walking past?
- YeGoblynQueenne 7y agoYes, I'm sure. Edit: because obviousy I also go into shops to buy stuff and I've never seen an air door used. If air doors are used, they are very, very rare.