>>3393370this guy
>>3393414knows.
I just fill the kitchen sink with warm water and get my chems up to temp, keep a big ass pot to one side with 40C water for intermediate washes and final wash, and go to town.
Only the first bath (developer) is temp critical anyway. As long as there's no massive variations between baths that might cause emulsion damage, the few degrees you may lose over the 15mins or so isn't important.
>t. devd hundred of rolls of c41 at home, not just once or twice, never had a failed c41 devE6 on the other hand...
Chems nowhere near as shelf stable. If you want to buy an e6 kit, make sure you have enough shot film to use it, or you're gonna get real sad when you roast some precious rolls with expired dev.
With fresh chems though, easy peasy.