• Humid (like in southern & eastern US)

Equipment needed

  • HAVEN Monitor
  • HAVEN Controller x2
  • Ventilating dehumidifier with 24VAC input (like the Santa Fe Ultra Aire 98H or 120H, or AprilAire e100V)
  • Motorized damper with 24VAC input, in an outdoor air duct
  • Air handler with 24VAC input

What does it do


  • Monitors indoor tVOC levels to know when you need a burst of fresh air
  • Opens damper & optionally activates ventilating dehumidifier's compressor to dehumidify the humid outdoor air we're bringing in
  • Closes the damper if outdoor AQI (standardized rating based on a combination of particles and chemicals) reaches a certain unhealthy limit


  • Monitors indoor relative humidity and temperature to calculate dew point to see if it needs moisture removal
  • Toggles on the ventilating dehumidifier's compressor to dehumidify the indoor air


  • The HAVEN Monitor in this scenario is installed in the indoor return duct of the air handler. HAVEN configures a circulation schedule in order to toggle the air handler fan on/off regularly throughout the day to take regular samples and filter the air. 
  • Monitors PM2.5 levels to determine when further filtration is needed
  • Keeps the air handler running and activates the ventilating dehumidifier's fan (separate from the compressor which dehumidifies the air)

How does it all fit together?


Wiring diagram


Ready to put the V back in HVAC?

Once you're on-site ready to install, just load up the HAVEN IAQ app and away you go!


*1 — What's dew point?
It's a calculation that uses indoor relative humidity and temperature to determine when dew will form on surfaces. This can lead to moisture problems! Dew point is a precise parameter to use for humidity control, because the amount of water the air can hold depends on its temperature! Without taking temperature into consideration, we're controlling based on a relative parameter. 



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