Model # H1

Internet #100023416

Store SKU #144657

Master Flow Manually Adjustable Humidistat for Power Vents
0050206002544

Master Flow

Manually Adjustable Humidistat for Power Vents

  • Adjustable Humidistat
  • Used with Master Flow Brand PG and PR Series Power Ventilators
  • Pre-wired for installation
$ 30 27
store icon Loading Buying Options...
package icon Loading Buying Options...
Sorry, but we ran into issues loading these options. Please try refreshing.

Frequently Bought Together

Frequently Bought Together

Product Overview

  • Adjustable Humidistat
  • Used with Master Flow Brand PG and PR Series Power Ventilators
  • Pre-wired for installation
Use the Master Flow Adjustable Humidistat with all Master Flow power vents. The humidistat helps reduce the likelihood of damaging moisture or heat from accumulating in your attic. Manually adjustable for varying climate conditions.
  • Humidity-activated humidistat can be adapted to accommodate all climate conditions
  • Designed for use with all Master Flow and LL Building Products power vents
  • For use with power ventilators rated not more than 7.5Amps
  • Constructed from galvanized steel for a durable design
  • Manually adjustable setting from Stop to 20% humidity
  • Pre-wired for simple installation

Product Overview

  • Adjustable Humidistat
  • Used with Master Flow Brand PG and PR Series Power Ventilators
  • Pre-wired for installation
Model #: H1
Sku #: 144657
Internet #: 100023416

Use the Master Flow Adjustable Humidistat with all Master Flow power vents. The humidistat helps reduce the likelihood of damaging moisture or heat from accumulating in your attic. Manually adjustable for varying climate conditions.

  • Humidity-activated humidistat can be adapted to accommodate all climate conditions
  • Designed for use with all Master Flow and LL Building Products power vents
  • For use with power ventilators rated not more than 7.5Amps
  • Constructed from galvanized steel for a durable design
  • Manually adjustable setting from Stop to 20% humidity
  • Pre-wired for simple installation

Specifications

Dimensions

Product Depth (in.)
5.25
Product Height (in.)
7.75
Product Width (in.)
4.75

Details

Amperage (amps)
7.5
Automatic/Manual
Manual
Color/Finish Family
Gray
Material
Galvanized Steel
Product Weight (lb.)
.7lb
Programmable
No
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
1-year Limited Warranty

Specifications

Dimensions

Product Depth (in.)
5.25
Product Height (in.)
7.75
Product Width (in.)
4.75

Details

Amperage (amps)
7.5
Automatic/Manual
Manual
Color/Finish Family
Gray
Material
Galvanized Steel
Product Weight (lb.)
.7lb
Programmable
No
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
1-year Limited Warranty

Questions & Answers

Is it hard wire or plug in

Asked by: Peetie
It is hardwire
Answered by: SGB
Date published: 2018-02-25

Can this run 2fans

Asked by: Barnguy
No, this unit is only designed to control a single fan.
Answered by: CommunityAnswer
Date published: 2018-05-16

Why do fans run 24/7 or off 24/7? Can't find happy medium for crawl space.

Installed this humidistat in crawl space to operate several vent fans with total load about 2 amps. Can't find % setting to work properly
Asked by: Frustrated
My setup has two humidistats. The first is at the "intake" side of the house and does not supply power to the second humidistat if the outside humidity is above a certain percentage since you don't want to pull in more humid air. So the first gate only opens when humidity is at a certain level outside to allow the second one to engage the fans and vent the crawlspace by pulling in less humid air. In your case, it may be running continuously because the outside air being pulled in is also more humid than the setting which will make things run continuously until the outside air humidity drops.
Answered by: KP
Date published: 2019-02-07

Would this be appropriate to control a crawl space fan for humidity control?

Would this be appropriate to control a crawl space fan for humidity control?
Asked by: Bubba
Yes, what I use this switch for
Answered by: David
Date published: 2019-02-03
  • y_2019, m_2, d_21, h_23CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.11
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_16
  • loc_, sid_100023416, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 27ms
  • QUESTIONS, PRODUCT

Customer Reviews

Manually Adjustable Humidistat for Power Vents is rated 4.0 out of 5 by 16.
Rated 1 out of 5 by from Was used and did not work. Looked new till... Was used and did not work. Looked new till you opened it. Extra Holes drilled in bottom with no order and shavings left in. No ground screw. After checking it, was a thermostat but marked as a humidistat. I lost time and money on this for a job. I had to order this.
Date published: 2018-12-18
Rated 5 out of 5 by from A "must purchase" for older homes This humidistat is a must have accessory for its matching gable mount attic fan which comes only with an adjustable thermostat. Especially in older homes with less or no attic insulation, it is critical to remove humidity which may leak from heated living spaces below into the attic during winter months. Unless this is done, damage to the underside of roofing underlayment will occur and it is conceivable that condensation and melting of ice formed inside the attic on roofing nails protruding through the underlayment will penetrate ceilings and leave water stains. My only issue with this humidistat unit is the wiring diagram stamped on the unit housing. It does not contemplate its use with a thermostat, so if one follows the diagram during installation the thermostat will not turn the fan on at the recommended 105 degrees in the Summer. Oddly, one must call the customer service number for the manufacturer and provide your email address at which they will email you the correct wiring diagram to connect the humidistat to the thermostat and allow them to work together properly. Seems to me it would be easier to just include a small paper insert in the box for either the thermostat or the humidistat to illustrate the combination set-up if you wish to use both units in series rather than the current "need-to-know" system.
Date published: 2016-08-17
Rated 3 out of 5 by from Couldn't get Humidistat to work. No matter what setting fans... Couldn't get Humidistat to work. No matter what setting fans would run 24/7 or off 24/7. Master Flo said you need one for each fan. Must not be able to monitor whole crawl space by using one because specs are it can handle a 6.5 amp load. My total load amounted to a little over 2 amp. Used the CMF formula to move air needed in description and using more I'm than double required
Date published: 2018-10-22
Rated 4 out of 5 by from It had to be wired (of course) as shown on... It had to be wired (of course) as shown on the side of the device...which was expected. I tested the device with a house foundation vent fan and at the time the fan came on at 40% humidity. I set it at 70%, which was a recommended setting. So, far, it has not detected enough humidity to run the fan.
Date published: 2018-09-26
Rated 4 out of 5 by from Seema to work O/K, will know better as we get... Seema to work O/K, will know better as we get into the heating season.
Date published: 2018-10-12
Rated 5 out of 5 by from Does the job... Does the job
Date published: 2018-10-16
Rated 5 out of 5 by from DUAL use! Great product! Let's you make DUAL use of your attic fan.
Date published: 2014-06-10
Rated 1 out of 5 by from Totally ticked. The unit received had clearly been installed before (3 random mounting holes dri... Totally ticked. The unit received had clearly been installed before (3 random mounting holes drilled in the bottom), so I bench tested it with my meter in a room I knew was 50% humidity and soon found why they had returned it. DOA. This cost me over $100 in lost time just because the vendor decided to ship me a used unit.
Date published: 2017-10-25
  • y_2019, m_2, d_22, h_21
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.11
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_16
  • loc_, sid_100023416, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 31ms
  • REVIEWS, PRODUCT