I am looking at LifeSource Water Systems for a whole house water filter that also softens the water without salt.
I found very positive reviews spanning over 20 years at https://trustpilot.com/review/lifesourcewater.com
There is also a video at lifesourcewater.com/watch
It appears that the system cost around $6000 and last for 10 to 20 years without maintenance. Couldn’t find information on filter change requirements, though. There must be some.
Let me know what you think.