The Heng Vortex fans will replace any standard size vent fan. Typically, there are four screws holding the inner trim section to the ceiling. Remove it and set it aside since you will reuse it. Other than that, it's just a matter of removing the old fan electrical parts and inserting the Heng. The Heng crank knob replaces the crank handle for raising the outer lis. All work is done from the inside. I've replaced the bathroom and bedroom fans with the Hengs. The one in the bedroom is multi-speed and reversible. A simple DIY job.
My wife is 5'2" and doesn't have trouble operating them. The Fantastic Fan in the kitchen is set to a moderate speed and we operate it via the thermostat (older, no remote).