Thanks Guys!
All 4 brand new in the box - it's interesting to note the differences between them. I bought an airflow meter and testing is interesting as well.
The Felix with it's ET1 power head is a great combination for convenience and cleaning ability (102 CFM @ "canister"). The Felix pulls 915W with the ET1 off.
The E3 is ultra quiet and has noticeably greater suction that really pulls its ET1 powerhead against the carpet forcefully for a deeper clean. Love the variable speed control on the handle and it manages 110 CFM at the end of the 7 foot tapered hose!, I can't test it without the hose, to compare at the canister itself but the Lindhaus does 100 CFM through it's tapered hose of the same diameter and length (118 CFM @ the canister).
The Miele is a non-electric hose machine making it's non-tapered, smaller and more flexible hose ideal for dusting, but I'm not crazy about getting hot air blown in my face as both the Lindhaus and the E3 have an Airbelt. It does 125 CFM @ the canister and 105 CFM at the hose end.
The Miele C3 and Sebo E3 canisters weight exactly the same at 11 lb, 14 oz - whereas the Lindhaus is a tank at a full 4 lb heavier than those.
Love the top handle on the Lindhaus, but I'm finding that I favor the Miele for quick dusting, pickup and hard floors, the Felix for daily carpet and the E3 for deep cleaning and using the hand-held turbo brush as it's airflow allows the brush to develop a lot of power and make it nearly impossible to stall. Also like the ET1 on a light wand for maneuverability.
I measured the current draw of the Lindhaus and was surprised to see that even the "300W" setting for 750 watts and the "1000W & 1200W" settings each drew 10 amps.
All are great machines and a pleasure to use - I've been in manufacturing my entire career and it's also interesting to note the different design decisions made and quality of the materials used.
