The GAF Master Flow adjustable Humidistat/Thermostat Combo works with GAF Master Flow EGV/ERV Series Vents. It works in harmony with your powered vent to help control damaging moisture. It also reduces heat accumulation and buildup in your attic. And is fully adjustable for varying climates.
Helps reduce the likelihood of damaging moisture or heat accumulation in your attic
Designed for use with GAF Master Flow EGV/ ERV series power vents
It functions but the Humidistat control does not reflect actual...
It functions but the Humidistat control does not reflect actual humidity in area. Not an exact reading just a basic control. Have to ignore the the numbers & set based on a separate humidity reading measurement.
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Verified Purchase
Oct 11, 2021
Easy to connect, and works well. There is a...
Easy to connect, and works well. There is a decent range of operation for both the temperature and the humidity to control my attic fan well. I could not get other controllers to come on when the temp is in the high 90's and then off in the 70's, but this was no problem. And for humidity, I programmed it to trigger successfully when the humidity is around 70 or so. I can't speak for longevity, but in the month I have had it, I am very happy with the unit.
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Sep 22, 2021
I had to buy this to replace the failed WiFi...
I had to buy this to replace the failed WiFi unit on the attic fan. In other words, I never received a refund for the more expensive WiFi unit, paid the electrician twice to come back to fix the installed unit which obviously couldn’t be sent back with a hole in my roof, and then had to buy this replacement part. In short, I ended up paying nearly double for my GAF WiFi Attic Vent unit. Great job GAF.
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1 found this review helpful
Sep 21, 2021
Master Flow Humidistat/Thermostat
The Master Flow Manually Adjustable Humidistat/Thermostat replaced an old relay thermostat that had questionable operation. This solid state controller should last a very long time.
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Verified Purchase
Recommended
Aug 27, 2021
An excellent upgrade....
An excellent upgrade.
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Response from Master FlowMar 18, 2022
Thanks for the feedback. Glad you were satisfied with your Master Flow purchase.
Jul 22, 2021
Use them for exhaust system for negative ventilation in a...
Use them for exhaust system for negative ventilation in a hotel
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Verified Purchase
Jul 8, 2021
The controller was easy to install and works well in...
The controller was easy to install and works well in either settings.
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Response from Master FlowApr 25, 2022
Thank you for the feedback. Glad you were satisfied with your Master Flow purchase.
Verified Purchase
Jun 10, 2021
Exact replacement for existing attic vent fan thermostat/humidistat....
Exact replacement for existing attic vent fan thermostat/humidistat.
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Response from Master FlowMar 18, 2022
Thanks for the feedback. Glad you were satisfied with your Master Flow purchase.