Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Does this help with water spots on glasses and scaling on bathroom fixtures?
Document: This will help aid in the fight against scaling in your tankless water heater but is not a complete solution. You should still flush you water heater at least once or twice a year with white food grade vinegar. I have a whole house sediment filter on where water comes in then this on right before the tankless heater.
I had a horrible problem with scaling... water heaters were not lasting more than a year before needing service. This filter installs before the heater and works like a charm!! Water heater has experienced no scaling and no loss of efficiency for over a year and a half! I replace the filter every 6 months. Replacement is easy as can be.I highly recommend this product!All the best,Jay
This not only filters out the sediment from the well but it has an added benefit  --  The water is much softer
Does what it says it does and works great so far. You need this if you have bad or hard water
Recommended by manufacturer and plumber due to water in our area, have not yet noticed the benifits but they haven't steered me wrong yet.
Be sure to use this to protect your new hot water system to keep it working correctly and problem free.
The product looked good but does not provide the water flow required by the water hear. So the nice folks at Home Plumbing took it back.
Gave it a high rating, because of the ease of installing. Only have to changethe filter every 6 months. This is supposed to be a life saver for the tankless water heater.
for $65 + $25 for refills, even if this adds 5% to the life of my tankless hot water heater, it has a good ROI. indications are that it can -- and will -- do much more than that as well as benefit the rest of the system when using hot water.
We bought this one to replace the one we installed in our house when we built in 2004. Can't say enought about how great this unit is...excellent water pressure &water temps. Like the protective filter. And digital readout.
Answer: yes