this is my 3rd heater,..
I started with an Arazbao JSD20,.. brilliant heater, but no CE mark & even on minimum heat too hot for comfort on frosty mornings.
Next was the L5,.. again no CE mark, but perfect heat output. The issue with the L5 is the minimum flow rate is very high. I modified it, but still kept my eyes open for one that would work unmodified.
I was interested in the Fogwash, but found this one which is just a bit prettier! It also has a digital temp readout, is CE marked & runs on a much lower flow rate without modification. The only issue is it has a 20 minute timer, and i'd have to buy 50 at a time before they'd modify that feature for me (maybe for next winter!),.. but it does seem to stop quicker than the L5 when i stop flow at the brush, so the timer might not be a massive issue for some.