Does this system soften water?

No. The polyphosphate filter prevents scale formation but doesn't remove calcium and magnesium from water, so your water's hardness remains unchanged after filtration. For water softening, consider iSpring WCS45KG water softener (search "B08XW4NXDP").

Can I install this system outdoors?

This system must be installed indoors. The installation site should be well-ventilated and shielded from wind and rain. Avoid direct sunlight and heat sources. It's advisable to have water leakage protection installed with the system. If outdoor installation is necessary, ensure proper insulation, including frost-proofing, sun protection, waterproofing, and insulation measures for both the body and pipes.

Can I use this system if my water flow is from left to right?

Yes, you can. However, please note that the inlet/outlet marking on the system is fixed, so you will need to flip the machine head to accommodate this setup. To do this, simply unscrew the screws on the machine head and flip it.