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Post by sss3 on Feb 21, 2016 7:22:42 GMT
What is this? Do they work? If so, cost?
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Post by beowoulf90 on Feb 22, 2016 17:10:59 GMT
In reference to what?
If referring to a power vent, say on a water heater yes they work. If the manufacturer is saying to use it, then you should.
Also used when proper draft/ventilation isn't possible due to length of vent or too many turns etc.
If you mean something else I can't help you..
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