1. The usage method is different. The return water system without a return water pipe needs to be temporarily opened when in use, while the return water system with a return water pipe does not need it.
2, the comfort level is different. A system without a return pipe must be opened when in use, which is more troublesome to operate, while a system with a return pipe is much simpler.
3, the mode is different. The system without a return pipe is relatively simple, while the system with a return pipe has temperature control, timing and other methods, and the options are more abundant.