Aprilaire #58 Humidistat

Aprilaire #58 Humidistat

REPLACED BY MODEL # 60

The new Aprilaire # 58 automatic humidifier control works in conjunction with your furnace to control the operation of the humidifier.  The control senses indoor RH and outdoor temperature and automatically adjusts the operation time of the humidifier to provide the optimum humidity level in the home.  The digitial readout on the control displays the RH level inside the cold air return.  Can also be used in manual mode when it is not possible to run wire to outdoor sensor.  MOUNTS ON RETURN DUCTWORK

New lighted display includes indoor relative humidity readout, service indicator light, water panel change light, and "on" indicator light

NOTE: control must be continously powered for proper functionality - separate 24 volt transformer may be required.

In order for the humidifier to operate, the furnace blower must be running and the humidifier control must be calling for humidity.  There are several different ways to detect blower operation - see installation instructions for details.  24 VAC is also required between W/G and Cf terminals.  See support addendum for details.

TYPICAL WIRING - USING FURNACE TERMINALS TO DETERMINE BLOWER OPERATION




Includes:

* Control
* Outdoor Sensor
* Manual Mode Resistor
* Manual Mode Sticker
* Installation Instructions
* Owners Manual

For use with models: 110, 112, 220, 224, 400, 440, 445, 445A, 448, 500, 550, 558, 560, 560A, 568, 600, 700, 760, 760A and 768

Unit dimensions - 5 15/*16" W X 4 1/4"" H
Requires round 3/4" hole for duct mounting.

Note - remote sensor can be purchased separately

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REVIEW SNAPSHOT®

by PowerReviews
Aprilaire #58 Humidistat
 
4.8

(based on 27 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Adjustable settings (8)
  • Easy to use (8)
  • Energy efficient (8)
  • Durable (5)
  • Good size/fit (5)

Cons

    Best Uses

    • Whole house humidifiers (11)
    • Dry winter (9)
      • Reviewer Profile:
      • Homeowner (25), Avid do-it-yourselfer (8), Professional (3)

    Reviewed by 27 customers

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    5.0

    Smartest way to control humidity.

    By Bill B

    from Addison, IL

    About Me Handyman, Homeowner

    Verified Buyer

    Pros

    • Durable
    • Energy Efficient
    • Good Fit

    Cons

      Best Uses

      • Whole House Humidifiers

      Comments about Aprilaire #58 Humidistat:

      Ordered the mod..#58 humidifier controller and only one minor problem. With the 3+ feet of snow in the Chicago area the outside thermistor was impossible to install, that's not the minor problem. I attached the manual resister to temporally checkout the unit. My humidifier is an old model 112 Aprilaire, it would not work per setup instructions. A short phone call solved the problem. The internal switch had to be put in the A position. The instructions with the control show the switch in the B position for mod.112 and that in the wrong position may damage the unit. This setting is apparently determined by the age of the humidifier, not clear in the instructions.

      Everything works fine now. When the weather permits I will install the outside thermistor.

       
      5.0

      Does what it is supposed to do

      By sabfish

      from Chevy Chase, MD

      Verified Buyer

      Pros

      • Clear display
      • Easy to install

      Cons

        Best Uses

          Comments about Aprilaire #58 Humidistat:

          The advice on the website aided the installation

           
          5.0

          A great upgrade

          By danno

          from fond du lac,wi

          About Me Handyman

          Verified Buyer

          Pros

          • Durable
          • Energy Efficient

          Cons

            Best Uses

            • Whole House Humidifiers

            Comments about Aprilaire #58 Humidistat:

            old controller died,$10(approx) more for this unit is well worth it.Had to run 24 v constant power to control,which is worth it since it has diagnostics&status indicators.

             
            5.0

            Excelent Product

            By Dustin

            from Eyota, MN

            About Me Homeowner

            Verified Buyer

            Pros

            • Ease of Use
            • No guessing
            • Set and forget

            Cons

            • Light stays on

            Best Uses

            • Whole House Humidifiers

            Comments about Aprilaire #58 Humidistat:

            Manual humidistats required us to make adjustments every couple of days depending on the weather. We have a lot of wood in the house so we need to keep the moisture level as high as possible. As it would get colder during the night or even during some of the days we had to adjust the humidistats to keep the water from condensing on the windows. With the #58 we just set it and made small adjustments so there wouldn't be any condensation on the windows. If it gets warmer or colder outside, we don't have to do a thing anymore.

            (1 of 1 customers found this review helpful)

             
            5.0

            Fried 1st One!

            By Eggs

            from Ottumwa, IA

            About Me Homeowner

            Verified Buyer

            Pros

            • Holds Humidity Levels

            Cons

              Best Uses

              • Whole House Humidifiers

              Comments about Aprilaire #58 Humidistat:

              Works perfectly unless you hook up a furnace's HUM terminal directly to humidistat terminals. Doesn't appreciate 120V coming into a 24V circuit. Pops, sparks and dies! New one works flawlessly and holds the humidity level set, unlike the manual models I have had in the past.

               
              4.0

              good replacement for my original part

              By creek man

              from St. Leonard Maryland

              About Me Homeowner

              Verified Buyer

              Pros

                Cons

                • Doesn't Fit

                Best Uses

                • Whole House Humidifiers

                Comments about Aprilaire #58 Humidistat:

                this was a replacement for another "aprilaire" 600 which was a new heat pump installation. The 600 model was exposed and only last 3-4years.

                 
                5.0

                Poifect!

                By Barry

                from Tyngsboro, MA

                About Me Homeowner

                Verified Buyer

                Pros

                • Durable
                • Easy Install
                • Energy Efficient

                Cons

                  Best Uses

                  • Whole House Humidifiers

                  Comments about Aprilaire #58 Humidistat:

                  Simple directions, easy install replacement for original AprilAire humidistat.

                  Although packaged for installation by a HVAC technician, it's simple enough to do if you have a basic understanding of making electrical connections, a basic toolkit (drill, 3/4" bit, screwdrivers) plus some simple supplies (2-conductor wire, wire caps, zip ties, self-tapping screws).

                   
                  4.0

                  Good Product

                  By Ken

                  from Rochester, NY

                  About Me Handyman, Homeowner

                  Verified Buyer

                  Pros

                    Cons

                    • Doesn't Fit

                    Best Uses

                    • Whole House Humidifiers

                    Comments about Aprilaire #58 Humidistat:

                    I replaced a manual Aprilaire controller and had to cover a large rectangular hole in the duct with sheet metal and drill a smaller hole for the new #58 unit to fit. The #58 comes with a thermistor, so I didn't have to buy one separately which I did because the literature didn't say what was included in the box. Other than that, the installation went smoothly and I'm happy with the product. I'd recommend the #58 to anyone handy enough to patch and drill sheet metal.

                     
                    5.0

                    Great Humidistat

                    By Jeff

                    from Canton, MI

                    About Me Handyman, Homeowner

                    Verified Buyer

                    Pros

                    • Energy Efficient
                    • Good Fit

                    Cons

                      Best Uses

                      • Whole House Humidifiers

                      Comments about Aprilaire #58 Humidistat:

                      This Humidistat works great with my General Filters whole house humidifier. I had the older model auto stat at my old house and when we moved this was a no brainer upgade. With this humidistat and the sensor mounted outside you won't have to worry about those windows getting wet or the house getting to dry. This thing works and it make life alot easier.

                       
                      5.0

                      Excellent replacement

                      By Shaun

                      from Saint John, IN

                      About Me Handyman, Homeowner

                      Verified Buyer

                      Pros

                      • Accurate
                      • Durable
                      • Energy Efficient
                      • Good Fit

                      Cons

                      • Installation

                      Best Uses

                      • Whole House Humidifiers

                      Comments about Aprilaire #58 Humidistat:

                      My aprilaire humidifier/humidistat that was installed along with my furnace in a our new home in 2007 started malfunctioning by making the home overly humid in the cold winter months. I live in northwest Indiana (Chicago area) in a very well insulated home with R50+ total in attic and R20+ total in walls, and on brutally cold days the windows and walls would be dripping with moisture. I found that the cheap aprilaire mechanical humidistat would not correctly determine the humidity level in the house, it seemed that it would only turn on or off manually around 30% humidity. I replaced it with the #58 humidistat along with the outdoor sensor, which was a pain to run the wiring, but was well worth the trouble. My home is more comfortable than it ever has been in the winter. I have the dial set in the middle number of the normal range. It keeps at a 30-40% level mainly except for 0 degree or lower nights where the humidity level may decline. I love the "set it and leave it" mentality it provides and it makes adjustments automatically according to outdoor temperature.

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