Works good if things aren't home run to a manifold. If it's a manifold which a branch out to each fixture this method doesn't accomplish anything for the other fixtures.


As for buttons ....
I like the motion idea but not huge on the push button. If you gotta walk in there and push a button ur still waiting for hot water. Might as well just turn the damn faucet on and wait as wait time wouldn't be any less. Seems pointless to me except if you had a recirc loop then u save a tiny bit of water versus down the drain but it's so minimal and waters so cheap in my area. Even with motion unless it's one damn large room to walk across you'll still be waiting for hot water. I agree a timer method is the best. Along with fully insulated hot water lines to help hold the heat for a bit since it was ran last.