What we look at when changing a door closer?

Door closers come in all different variations and varieties so the door closer you purchase should be suitable for the door it will be fitted to and be suitable for the type of traffic using the door, close the door reliably and completely after every opening cycle, operate in a safe manner so users are not harmed and the door set/door assembly is not damaged. We also look at the quality of the product with quite a few brands out there like Geze, Briton, Dorma, Exidor, Hoppe, Adams Rite, Axim and Rutland to name a few what one do you use? if the closer is the correct variation and fit for purpose for the door we always change like for like as especially on fire doors we do not want to leave open screw holes and as some of these doors get used as high traffic doors they will reach the end of there life and need replacing.