I shower with spring water, and it's COLD! Always!
I highly recommend a butane camping stove if you can get one. Very efficient and easy to use, compared to white fuel and propane. Similar in cost for occasional useand much cleaner and easier to deal with than liquid fuels. I use this exact model all the time as my main cooking tool - mostly I cook coffee lol It boils a full size coffee pot in about two minutes. Super fast heat. I have seen them and clones that are probably fine (its not a complex device) for around $20 USD online - amazon and major sporting good suppliers
Many thanks @sircork. I will visit the camping-gears shops soon. But I already got a liquid gas burner for back-up. Another electricity blackout last weekend in Nongkhai. Perhaps, I have to start thinking about solar panels this year. I wish I had thirty hours a day!
Only 30 hours per day? You must be lazy! :D I need 300 hours a day!