My instructions do mention that lower water temp will slow RO productions and increase waste water as well. I think DanG has something there. By increasing the legnth of the 1/4" inlet line and coiling it up and submerging it into your sump or a bucket of heater water would be a good way to temper your water supply. It shouldnt take much energy to temper water in 1/4" tubing. I think Im going try making myself a simple flow through heat exchanger.
