Does this kind of heater seem to make things a bit more like grief ?
I have run an L5 for 2 years now with no issues at all , 5 minutes to put it in when summer ends , job done for the winter , no extra wiring , run it min gas min flow and bobs your mothers brother , keep working , only issue i could pick is the 20 min timer , but watch your clock and dead end as and when needed .
Rich