Smart Humidity Control and Display User Guide

Alarm.com’s Smart Humidity Control and Display brings exciting features to the Smart Thermostat. Alarm.com users with an eligible Smart Thermostat can view and control the humidity level in their home or business using the Alarm.com Website or mobile app.

A humidifier or dehumidifier can be directly connected to the Z-terminal of the Smart Thermostat, eliminating the need for a separate humidistat to control humidity. Air conditioners can also be used to dehumidify customer’s homes or businesses, so no new hardware is required. Customers can enjoy increased comfort, control, and property protection by setting minimum and maximum humidity thresholds to raise (with humidifier) or lower (with dehumidifier or air conditioner) the humidity level.

Humidity notifications provide an extra layer of protection against mold growth. The Smart Humidity function is beneficial in varying climates from very hot and humid areas in the summer to very cold or dry areas in the winter.

What do you need to use Smart Humidity Control?

  1. Humidifier or dehumidifier.

    • Users without a humidifier or dehumidifier can still benefit from turning on the Smart Humidity Control feature. When the feature is enabled, users can lower their humidity using their air conditioner and view humidity levels
  2. HVAC system must be properly configured with at least one stage of cooling and/or at least one stage of humidity control (Z terminal).

  3. One of the following compatible thermostats:

  1. Must have a compatible panel. For more information, see below.

  2. A service plan with Home Automation features:

    • Surety Home
    • Surety Complete

Set up Smart Humidity Control

Steps on how to set up Smart Humidity Control can be found here:

View current humidity level

Alarm.com users with a Smart Thermostat and compatible panel can see their current humidity level by clicking on the thermostat card on the Alarm.com Website or mobile app.

The ADC-T40K-HD will display the humidity level on the thermostat’s display by default. The ADC-T3000 can display the humidity percentage locally in all modes when the Display Option is set to Humidity and the temperature is set to Fahrenheit. Humidity display is not supported when in Celsius mode.

No Smart Thermostat firmware version is required to display the humidity level on the Alarm.com Website and app, but the ADC-T2000 requires version 1.50+ to be compatible with Smart Humidity Control.

The following image displays a thermostat with a 44% humidity reading on the app:
currentlevelapp
The following image displays two thermostats on the home page of the Alarm.com Website. The first thermostat is in heat mode with a 20% humidity reading. The second thermostat is in auto mode with a 25% humidity reading:

Enable the Smart Humidity feature

You can enable Smart Humidity Control using the Alarm.com Website or app.
While the T40K-HD and T3000 are natively compatible with humidity control, the T2000 must be on version 1.50+.

To enable Smart Humidity Control using the Alarm.com Website:

  1. Log into the Alarm.com Website.
  2. Click Automation.
  3. Click Add New Rule.
  4. Click Thermostat Rule.
  5. Click Smart Humidity Control.
  6. Using the dropdown menus, select the desired humidity setpoints.
  7. Click Save.

To enable Smart Humidity Control using the Alarm.com app:

  1. Log into the Alarm.com app.
  2. Tap Thermostats on the thermostat card.
  3. Tap Settings Gear
  4. Tap Device Settings.
  5. Tap Humidity Control.
  6. Tap the Smart Humidity Control toggle switch to enable it.
  7. Tap Back
  8. Tap Apply to save changes.

Set humidity target levels

To regulate humidity levels in a home or business, you must select target humidity levels, similar to how you set temperature targets for standard thermostat operation. The customer is prompted to set the humidity setpoints after enabling the Smart Humidity Feature.

To configure Smart Humidity Control using the Alarm.com Website:

  1. Log into the Customer Website.
  2. Click Automation.
  3. Click Edit Pencil on the existing Smart Humidity Control rule.
  4. Using the dropdown menus, select the desired humidity setpoints.
  5. Click Save

Note: To disable Smart Humidity Control, click the toggle switch in the Smart Humidity Control rule.

To configure Smart Humidity Control using the Alarm.com app:

  1. Log into the Customer app.
  2. Tap Thermostats on the thermostat card.
  3. Tap Settings Gear
  4. Tap Device Settings.
  5. Tap Humidity Control.
  6. Use the slider to adjust to the desired humidity setpoints.
  7. Tap Back
  8. Tap Apply to save changes.

Note : To disable Smart Humidity Control, tap the Smart Humidity Control toggle switch.

Change the humidity differential

The humidity differential feature maintains a comfortable balance of both temperature and humidity levels in your home and is only necessary when the air conditioner is used to dehumidify the home. The humidity differential prevents a thermostat that is dehumidifying using an air conditioner from cooling too far below the cool setpoint. The default setting is 3⁰F (1.5⁰C) and generally does not need to be adjusted.

To adjust the humidity differential using the Alarm.com Website:

  1. Log into the Customer Website.
  2. Click > on the thermostat card.
  3. Click Advanced Configuration.
  4. Click Advanced.
  5. In Humidity Differential, set the number of degrees the thermostat is allowed to go below the cooling setpoint when air conditioning is being used to dehumidify
  6. Click Save.

To adjust the humidity differential using the Alarm.com app:

  1. Log into the Customer app.
  2. Tap Thermostats on the thermostat card.
  3. Tap Settings Gear
  4. Tap Device Settings.
  5. Tap Advanced Settings.
  6. In Humidity Differential, tap Add to increase the degree, or tap Minus to decrease the degree. This is the number of degrees the thermostat is allowed to go below the cooling setpoint when air conditioning is being used to dehumidify.
  7. Tap Back
  8. Tap Apply to save changes.

Smart Humidity notifications

Smart Humidity notifications allow users to be notified if the thermostat reads a humidity level above or below the specified threshold.

To create Humidity Alert notifications using the Alarm.com Website:

  1. Log into the Alarm.com Website.
  2. Click Notifications.
  3. Click New Notification.
  4. Click Temperature.
  5. Click Humidity Alert.
  6. Name the notification.
  7. In When device detects a relative humidity, click to select Above and/or Below, and then use their dropdown menus to select the threshold humidity percentage.
  8. In For the selected devices, click to select the thermostats the specified humidity threshold is applied to.
  9. Click Add to specify which contacts receive the notification.
  10. Verify all desired settings are set, click Save.

To create Humidity Alert notifications using the Customer app:

  1. Log into the Customer app.
  2. TapMenu
  3. Tap Notifications.
  4. Tap Settings Gear.
  5. Tap Add.
  6. Tap Use A Template.
  7. In Temperature, tap Humidity Alert.
  8. Name the notification.
  9. In When device detects a relative humidity, tap to select Above and/or Below, and then use their dropdown menus to select the threshold humidity percentage.
  10. In For the selected devices, tap to select the thermostats the specified humidity threshold is applied to.
  11. Tap Add to specify which contacts receive the notification.
  12. Verify all desired settings are set, tap Save.

Frequently Asked Questions

Panel/module compatibility

Smart Humidity Control is available on systems with Z-Wave versions 2.13+.

Panel type Minimum version
2GIG EDGE All panel versions
2GIG GoControl / GC2 / GC2e Panel version 1.13
2GIG GC3 / GC3e Panel version 3.0.1
DSC PowerSeries Neo Module version 185e
DSC Impassa Module version 1.3
Interlogix Simon XT / XTi Module version 185b
Interlogix NX Module version 185a
Interlogix Concord Module version 185b
Qolsys IQ / DSC Touch Incompatible
Qolsys IQ Panel 2 Panel version 2.0.0
Qolsys IQ Hub / IQ Panel 4 / IQ4 Hub / IQ Pro / IQ4 NS All panel versions
SEM - Honeywell/ADEMCO Vista SEM version 187
SEM - DSC PowerSeries SEM version 185a
Alarm.com Hub / B36 Hub / PC Hub 2.0 Hub version 185c

Why am I unable to set a minimum humidity threshold?

  • No humidifier connected to the system.
  • NO eligible Smart Thermostat (T3000 or T2000 with firmware version 1.50+).
  • HVAC system is not properly configured (no cool stages or unconfigured Z terminal).
  • No thermostat on the Alarm.com account.
  • Not enrolled in a service package that supports this feature.

Can the user change humidity settings on the Alarm.com mobile app?

Yes. The user can enable, disable, and adjust the settings of humidity control using the Alarm.com app or website.

How is an external humidifier or dehumidifier wired into the Smart Thermostat?

Humidity control systems can have a few different configuration types. See the installation guide here.

The HVAC system has a dehumidification mode, can that be used?

Yes. Most HVAC systems use a wire to control this mode. Determine which wire is used for humidity control in the user’s system. It typically is a non-conventional label such as X or S. Wire this into the Z-terminal and configure the terminal to be a dehumidifier. The system now knows when it needs to run in dehumidification mode based on the humidity setpoint set from the Customer Website or app.

What is the best humidity setting for avoiding mold growth?

Humidity over 70% greatly increases the risk of mold growth, which can cause significant property damage if left unnoticed or untreated. Alarm.com defaults the setpoint to 70% for this purpose. Some people begin to feel uncomfortable around 65% humidity, and mold growth can vary by region.

What is a comfortable minimum humidity level?

Most people find humidity levels below 25% to be uncomfortable, which is the default minimum setpoint. Some people find levels below 40% uncomfortable.

Does the Smart Humidity Control save energy?

Humidity control is primarily a feature targeted to maximize comfort. Generally, it requires more energy to maintain a comfortable humidity and temperature range than it does to simply monitor temperature. The true savings of humidity control comes from the property protection. Preventing high humidity levels that increase the chance of mold growth can save the customer from expensive repairs due to mold damage.

Does the Alarm.com Smart Thermostat work on battery power only?

It is not required to connect the thermostat to AC power, but when relying on battery power only, it is not able to act as a Z-Wave repeater. All other functions are able to be performed.

More information on Alarm.com Smart Thermostats can be found here: