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I work in the industry and I have no idea why anyone would use anything other than the EZH2O for indoors. The other ones aren't even any cheaper.
This comment just made me realize that the EZH20 is both the model type as well as a description of what it does lol
Good naming of the product I'd say
Makes me wonder what the VRCTL8SC is doing
Rolls right off the tl8ngue
and at least on the EZH2O you can see the quality of the filter that hasn't been replaced since twas installed
I do MEP design for commercial buildings in the US. If a job ever shows "EWC", I don't ask for specs, I assume the EZH2O until either the job goes out with that spec, or the client directly refuses to use that model.
Anything less, is uncivilized.