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Honeywell H8908DSPST Low Voltage Dehumidistat

Honeywell H8908DSPST Low Voltage Dehumidistat

About This Product

MFG: Honeywell
MFG#: H8908DSPST
Our#: 173917

The H8908DSPST Humidity Controller is used with portable and central unit dehumidifiers that accept 24 Volt Controls, or for mildew control with air conditioning systems.

The H8908DSPST has a spst, snap-acting, dust-proof switch and are designed for wall or surface duct mounting. Color White.  Can be mounted horizontally or vertically.

FEATURES:

  • SPST, snap-acting, dust-proof switch.
  • Positive ON and OFF settings.
  • Twelve-inch ribbon of thin, moisture-sensitive nylon ribbon wound around three bobbins effectively gives optimum control for reliable operation under changing ambient conditions.
  • Mounts in duct or on wall surface.

SPECIFICATIONS:

  • Description - Dehumidistat
  • Application - Dehumidification
  • Type - Humidity Control
  • Voltage - 24 Vac
  • Electrical Ratings (120 Vac, Full Load) - 50 VA at 24 Vac
  • Color - Premier WhiteŽ
  • Mounting - Duct mount
  • Mounting - Wall mount
  • Differential - 4% to 6% RH
  • Temperature Range (F)  -20 F to +120 F
  • Temperature Range (C)  -29 C to +49 C
  • Operating Humidity Range (% RH)  10 to 60% RH
  • Dimensions (in.)  19 in. H x 11 1/4 in. W x 9 in. D

REVIEW SNAPSHOT®

by PowerReviews
Honeywell H8908DSPST Low Voltage Dehumidistat
 
4.3

(based on 4 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to adjust (3)
  • Easy to install (3)

Cons

    Best Uses

        • Reviewer Profile:
        • Homeowner (4)

      Reviewed by 4 customers

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      5.0

      In series or parallel

      By Dave

      from New Smyrna Beach, FL

      About Me Handyman, Homeowner

      Verified Reviewer

      Pros

      • Easy To Adjust
      • Easy To Install

      Cons

        Best Uses

        • Central Controls

        Comments about Honeywell H8908DSPST Low Voltage Dehumidistat:

        I read the reviews and installed the dehumidistat with the wiring "in parallel", with one wire to the RC and the other to Yellow. That way either the temperature or the humidity will trigger the A/C. As I think about this, however, the manual isn't wrong, per se, it shows an "in series" wiring, so that when you're away you'd set the temperature down, for example, and the dehumidistat where you wanted it triggered. When you're home, you'd turn the dehumidistat to "on" and use the thermostat to control the temperature. Either way works -- in fact, the series wiring solves the problem that might occur if you have the dehumidistat triggering the A/C at the same time as the thermostat is triggering the heat ...

        (3 of 3 customers found this review helpful)

         
        4.0

        Good product/Install Simple

        By The engineer

        from Florida

        About Me Homeowner

        Verified Buyer

        Pros

        • Easy To Adjust
        • Intuitive Controls

        Cons

        • Wiring diagram incorrect

        Best Uses

        • Homes

        Comments about Honeywell H8908DSPST Low Voltage Dehumidistat:

        Easy to install if the correct wiring diagram was provided. Had to contact Honeywell and speak with a knowledgeable technician who indicated the wiring diagram in the instructions was incorrect if hooked-up to an existing thermostat to control humidity using a central AC unit. One wire from the dehumidistat has to be attached to the yellow position on the thermostat and the other to the RC terminal. Make sure the thermostat is in the cool position before turning on the dehumidistat.

        (1 of 1 customers found this review helpful)

         
        5.0

        [...]

        By arlette

        from wtby,ct

        About Me Homeowner

        Verified Buyer

        Pros

        • Easy To Adjust
        • Easy To Install
        • Precise Controls

        Cons

          Best Uses

          • Large Rooms

          Comments about Honeywell H8908DSPST Low Voltage Dehumidistat:

          [...]

          (2 of 3 customers found this review helpful)

           
          3.0

          A dehumidstat can save you money.

          By Jdar1

          from Sarasota, FL. in a humid forest !

          About Me Handyman, Homeowner

          Verified Buyer

          Pros

          • Easy To Install
          • Intuitive Controls

          Cons

            Best Uses

            • Homes
            • Small Rooms

            Comments about Honeywell H8908DSPST Low Voltage Dehumidistat:

            I ordered this dehumidstat to save $$$ while I am away from central Florida during our very humid summer rainy season. It is easy to install because it's just a switch installed in the line that sends current to the outdoor A/C condenser. But the setting of the control knob is very specific. I set mine at 60%(actual as measured by an external meter) which reads about 68% on the Honeywell control. Be sure to set your thermostat to 79 degrees (no higher) or the system will run too long--costing you money.

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