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Discussion Starter · #1 ·
I have a rooftop evaporative cooler, about 30 years old. Works great, but about time for a change. I'm looking at the "high-efficiency" rigid filter types, and wondering if they are much better?

I don't really understand the "dump" on these however - apparently they completely drain and refill the water one or more times per day. This seems wasteful to me. Will I have a hose or pipe running down my roof to the gutter?

I appreciate any comments. Thanks
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