Bristles
I think when the bristles are new they are fine. I have a Kenmore canister with super stiff plastic bristles and while it does fluff older matted cheap carpet better, it also rips the fibers out and sucks them in the bag. Too stiff I say. For expensive carpeting and rugs the bristles on the Aerus/Electrolux are correct so as to not cause excess wear on the carpet but still remove the dust that has settled into the carpet without destroying it. Stiffer isn’t always better. If you need better lifting of the carpet fibers, you either have cheap carpet that mats or it is already worn out. If it’s just matted, better to use a carpet rake than a stiff bristled power nozzle to lift that nap in my opinion. Yes you can use a stiffer bristled power nozzle to lift the matted nap but it will also wear out the carpet that much faster, whereas a carpet grooming rake won’t wear out the carpet.
I think when the bristles are new they are fine. I have a Kenmore canister with super stiff plastic bristles and while it does fluff older matted cheap carpet better, it also rips the fibers out and sucks them in the bag. Too stiff I say. For expensive carpeting and rugs the bristles on the Aerus/Electrolux are correct so as to not cause excess wear on the carpet but still remove the dust that has settled into the carpet without destroying it. Stiffer isn’t always better. If you need better lifting of the carpet fibers, you either have cheap carpet that mats or it is already worn out. If it’s just matted, better to use a carpet rake than a stiff bristled power nozzle to lift that nap in my opinion. Yes you can use a stiffer bristled power nozzle to lift the matted nap but it will also wear out the carpet that much faster, whereas a carpet grooming rake won’t wear out the carpet.