ProThermostats.com > Aprilaire #4655 Humidistat

Aprilaire #4655 Humidistat

Aprilaire #4655 Humidistat

About This Product

MFG: Aprilaire
MFG#: 4655
Our#: 171317
The Aprilaire 4655 Humidistat is designed for low voltage service to control humidification equipment. An increase in relative humidity expands the nylon ribbon which opens the control switch to stop operation of the humidifier. A decrease in relative humidity reverses the process and closes the control switch.  Can be wall mounted or mounted on return plenum.  Includes plenum cutout template (4 5/32" X 2 7/16").  For duct mount, locate at least 6" upstream of humidifier, humidifier bypass ductwork or fresh air intake ductwork.

Specifications

Range - 15% to 50%

Operating Differential - 8% RH Maximum

Dimensions - 5 1/8" W X 3 3/8" H X 1 15/16" D

Electrical Data -

SPST Switch
2 Wires
24 VAC
Max. Load (contacts) - 5.2 Amps

For use with models: 110, 112, 220, 224, 350, 360, 400, 440, 445, 445A, 448, 500, 550, 558, 560, 560A, 568, 600, 700, 760, 760A and 768

ProThermostats.com Price:

$35.26

Regular $49.95, You Save $14.69 (29%)
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REVIEW SNAPSHOT®

by PowerReviews
Aprilaire #4655 Humidistat
 
4.3

(based on 55 reviews)

91%

of respondents would recommend this to a friend.

Pros

  • Good size/fit (16)
  • Adjustable settings (14)
  • Easy to use (10)
  • Energy efficient (9)
  • Durable (8)

Cons

  • Not durable (4)

Best Uses

  • Whole house humidifiers (29)
  • Dry winter (14)
    • Reviewer Profile:
    • Homeowner (48), Avid do-it-yourselfer (6)

Reviewed by 55 customers

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Displaying reviews 31-40

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4.0

Good Stuff

By Rafe

from Chicago

About Me Homeowner

Verified Buyer

Pros

  • Good Fit

Cons

    Best Uses

    • Whole House Humidifiers

    Comments about Aprilaire #4655 Humidistat:

    Arrived just as advertised and works like it's supposed to.

     
    4.0

    Easy to install and worked immediately

    By handy homeowner

    from Massachusetts

    About Me Homeowner

    Verified Buyer

    Pros

    • Good Fit

    Cons

      Best Uses

      • Whole House Humidifiers

      Comments about Aprilaire #4655 Humidistat:

      Replaced one that was 15 years old that had stopped working though it was receiving power from the 24v transformer. The footprint was slightly different, so I had to get out my metal shears to set it into the return. The old one was mounted flush. I noticed that the ribbon technology in the new product was identical to the old one.

      (1 of 1 customers found this review helpful)

       
      5.0

      Easy update to an old eyesore!

      By DIY Homeowner in Ohio

      from Ohio

      About Me DIY, Homeowner

      Verified Buyer

      Pros

      • Durable
      • Easy to install
      • Easy to use
      • Good Fit

      Cons

        Best Uses

        • Whole House Humidifiers

        Comments about Aprilaire #4655 Humidistat:

        We purchased this humidistat control to replace an old brown control that was an eyesore. We have an Aprilaire 550 whole house humidifier and this new humidistat was easy to install - in fact it was identical to the original control. Just a quick switch of wires and that was it! We're thrilled with our purchase and know this was an easy update that will help with our homes resale value.

        (0 of 1 customers found this review helpful)

         
        4.0

        basic, no frills , easy install

        By chicago suburbs

        from chicago,il

        About Me Homeowner

        Verified Buyer

        Pros

        • Adjustable Settings
        • Easy To Use

        Cons

          Best Uses

            Comments about Aprilaire #4655 Humidistat:

            This new control replaced an older model that failed during a new furnace install. Simple and easy to install.

            (0 of 1 customers found this review helpful)

             
            5.0

            As advertised

            By Bob

            from Altoona, Pa

            About Me Homeowner

            Verified Buyer

            Pros

            • Adjustable Settings
            • Easy To Use

            Cons

              Best Uses

              • Dry Winter

              Comments about Aprilaire #4655 Humidistat:

              The humidistat was easy to install and worked out of the box.

               
              5.0

              Solid product easy to install

              By Valley Bill

              from Apple Valley. MN

              About Me Homeowner

              Verified Buyer

              Pros

              • Easy To Use

              Cons

                Best Uses

                • Dry Winter

                Comments about Aprilaire #4655 Humidistat:

                Directions were clear and the product is simple to use

                 
                4.0

                Easy order. Product works as advertised

                By REB

                from Mystic, CT

                About Me Homeowner

                Verified Buyer

                Pros

                • Easy To Use

                Cons

                  Best Uses

                  • Dry Winter

                  Comments about Aprilaire #4655 Humidistat:

                  Product very simple. Works as advertised. I was replacing an older unit that had a larger opening in the duct, so I had to cut a larger piece of sheet metal to cover the larger hole, then made a cutout the correct size.

                   
                  4.0

                  Be prepared to improvise

                  By Runner Dean

                  from Solon, Ohio

                  About Me Homeowner

                  Verified Buyer

                  Pros

                  • Adjustable Settings

                  Cons

                  • Size didn't match

                  Best Uses

                    Comments about Aprilaire #4655 Humidistat:

                    The unit works just fine, but I had to improvise because the new unit did not fit over the "cut out" in the plenum in exactly the same fashion as the old one. I was able to use part of the old unit's "plate" to install. Don't know why they change sizes on these things.

                     
                    5.0

                    high quality

                    By Bob

                    from Freeland,Maryland

                    About Me Homeowner

                    Verified Buyer

                    Pros

                    • Easy To Use

                    Cons

                      Best Uses

                      • Dry Winter

                      Comments about Aprilaire #4655 Humidistat:

                      replacement for humistadt from #560. It needed to have a different size duct opening that I had to cut with a dremel.The dremel made it much easier. Works perfect.

                      (1 of 1 customers found this review helpful)

                       
                      4.0

                      [...]

                      By Pave

                      from Randolph NJ

                      About Me Handy homeowner

                      Verified Buyer

                      Pros

                      • Ten minute install

                      Cons

                      • None

                      Best Uses

                      • Whole House

                      Comments about Aprilaire #4655 Humidistat:

                      Absolutely delighted to be able to get an exact replacement.

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