I like my 405 9000 hours worth, still the #5 blower and peeps I talked to say the thermal wave is better for dual wanding!
Had a local guy here own's 4 thermal waves and a 405 says the 405 is hotter in his opinion, Still if your dual wanding with a 405 you would have to go with to low flow wands My son and I did it today on a vacant rental 2800 sq ft it was almost dry when we were done!
Pre sprayed the heck out of it with Saffire Fission scrubbed and rinsed!