Rainwater - is it clean enough?

[Sirius_dogstar]

Get a dehumidifier. Produces demin water as it freezes the water out of your air in your house. Put one in your garage gives a nice dry environment for your car or bike. I get about 5 litres per week & there's just the 2 of us in the house and both work. The more people living in the house the more water vapour. Dryer air makes the whole house warmer. Same reason as why one wants water injection. Heat capacity of water etc.