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
I replaced the original nylon band control with this digital model. The fact that it was controlled by outside temp was appealing since I did not want to keep adjusting the manual control all the time as temperature drops and the heater runs more often. This seems to keep the humidty constant within a few points and does not over humidify if I forget to change the manual control as mentioned above.
12/29/2009
5.0
Much needed upgrade
By Bruce
from Fairfax, VA
About Me Homeowner
Pros
Durable
Energy Efficient
Good Fit
Long Lasting
Cons
Best Uses
Whole House Humidifiers
Comments about Aprilaire #58 Humidistat:
Much better step-up from #56. I installed this with the older model 700 (Almond color) and it works beautifully.
12/4/2009
(1 of 1 customers found this review helpful)
5.0
Jumper required
By john
from Rochester, NY
About Me Homeowner
Pros
Easy To Use
Cons
Best Uses
Dry Winter
Comments about Aprilaire #58 Humidistat:
The old one didn't require constant 24 volts. Needed to modify the wireing diagram to add jumpers wires to tie the switched 24 v to the constant 24 v screw connectors. Now it works when the furnace is turned on.
12/3/2009
4.0
Aprilaire #58 w/ Honeywell Humidifier
By Chuck
from Harrisville NH
About Me Homeowner
Pros
Adjustable Settings
Easy To Use
Cons
Best Uses
Comments about Aprilaire #58 Humidistat:
Used in place of manual Honeywell controller so that outside temperature was sensed automatically.
11/13/2009
5.0
Great product
By Duckpinjoe
from Pasadena Maryland
About Me Homeowner
Pros
Easy To Use
Cons
No cons
Best Uses
Dry Winter
Comments about Aprilaire #58 Humidistat:
Easy to setup
3/31/2009
5.0
Installed easily, works great.
By Carlos
from Naples, NY
About Me Homeowner
Pros
Adjustable Settings
Easy To Use
Lightweight
Quiet
Cons
Best Uses
Comments about Aprilaire #58 Humidistat:
Used to control new Geothermal System. Old mechanical humidistat did not work correctly. Plumbed to hot water as per instructions for Geothermal System.
2/21/2009
5.0
great improvement over the #56 autotrac
By grizzly
from mpls mn
About Me Homeowner
Pros
Easy To Use
Cons
Best Uses
Dry Winter
Comments about Aprilaire #58 Humidistat:
was easy to install and works perfectly.
2/10/2009
5.0
easy install, was a replacement for #56
By Roger
from Jefferson, Ohio
About Me Homeowner, Professional
Pros
Adjustable Settings
Easy To Use
Cons
Best Uses
Dry Winter
Comments about Aprilaire #58 Humidistat:
easy to use
Service and delivery comments:
prompt delivery, good condition
2/10/2009
5.0
did not use product, replaced unit
By Dick the husband
from Wind Lake, WI
About Me Homeowner
Pros
Adjustable Settings
Cons
Best Uses
Dry Winter
Comments about Aprilaire #58 Humidistat:
returned unit, did not use, no problem with returning part.....thank you
2/6/2009
(1 of 1 customers found this review helpful)
4.0
Aprilaire 58 Controller
By memfields
from Leesburg, VA
About Me Homeowner
Pros
Adjustable Settings
LED Digital Display
Cons
Best Uses
Dry Winter
Comments about Aprilaire #58 Humidistat:
Upgraded from controller that came with Unit (Aprilaire 700) which had quit working after 5 years. Installation was very easy using the included directions. Extra wiring was simple and well displayed in paperwork. When I called with a question it was answered quickly and informatively. I like this controller much better than the original because it actually displays the humidity in RH form on the controller. Much easier to tell if it is working and when to change the filter or call for service. Overall I'm satisfied!
