I have a question about how filling a bathtub would work with a tankless system. Due to my panels load/capacity I'm looking at the RHEEM RTEX-11 with a Flow Rate: up to 2.68 GPM.
I'm worried about filling my tub as it's quite large, but don't understand what happens when GPM is low.
- I only have 1/2 Pipe in my house for one thing, not sure the PSI but it's low.
- If the GPM is low, and I crank the tub to 100% Hot, will it just be a slow hot water pour or will the GPM basically match my homes pressure and the water won't be warm/hot as it's not spending enough time in the tank?
- I don't mind if it takes longer to fill my tub, just want it to be hot. It just occurred to me that slower fill means more heat will dissipate before filling, but the entire stream will be hot. As it stands, my tank is only about 3/4's my tub and then it fills the rest with cold water. I expect the two would be about the same, if that's how it worked, but I'm not sure if the stream would be hot with low gpm.