Every air quality problem a vacation rental host deals with, mold, poor ventilation, lingering vape aerosol, traces back to the same root cause: nobody was watching until it was too late. Alertify’s indoor air quality monitoring device, known as AQI+, was built to close that gap by tracking everything that matters inside a unit, continuously, from one piece of hardware, rather than asking hosts to piece together several separate tools or rely on memory and guesswork.

What the Device Actually Tracks

AQI+ monitors humidity, temperature, CO2, and smoke or vapor particles in real time, covering the full range of conditions that quietly shape both guest comfort and property damage risk. It plugs directly into any standard outlet, connects to WiFi, and links to a unit through the Alertify dashboard in a setup process that takes about 15 minutes on-site. There are no cameras and no microphones involved, which means guest privacy stays fully intact while property conditions stay fully visible to the host, a distinction that matters both for guest trust and for compliance with platform policies that prohibit recording devices inside private living spaces.

This combination of sensors matters because these conditions rarely occur in isolation. A unit with poor ventilation often also runs a higher humidity risk, since stale air circulates moisture less effectively than a well-ventilated space. Tracking all of these conditions together, rather than picking just one, gives hosts a genuinely complete picture rather than a partial one that might miss a related but distinct problem developing in the same unit.

From Sensor to Alert to Action

The moment a threshold gets crossed, whether that is rising humidity in a bathroom, elevated CO2 in a bedroom, or the first signs of indoor smoking, humidity and CO2 can be viewed on the dashboard on live graphs. Units with high humidity are flagged on the dashboard. Every event also gets logged and stored for more than 180 days, giving hosts a searchable history they can reference for maintenance planning, review disputes, or compliance documentation well after the fact. This is the same real-time detection and logging covered throughout our guide to indoor air quality monitoring for vacation rentals, just packaged into a single device that handles the full range of conditions discussed there.

Built for Hosts Managing More Than One Property

For hosts running a single seasonal rental, AQI+ means one less thing to check manually between guests. For hosts managing a larger portfolio, the value scales directly: the dashboard consolidates readings across every unit into one view, which is exactly what a property monitoring system needs to do to be useful at any size. Rather than logging into separate systems or physically visiting each property to get a sense of overall portfolio health, a host can scan a single dashboard and immediately see which units, if any, need attention.

Alertify also integrates directly with the platforms hosts already use daily, including Airbnb, Guesty, Hospitable, and Hostex, so air quality alerts show up alongside booking and guest communication tools rather than living in a separate app nobody checks. That integration is a deliberate design choice, since even the best monitoring system provides little value if hosts do not actually see and act on its alerts in the flow of their normal daily workflow.

Alertify built AQI+ specifically for the realities of short-term rental management, where hosts cannot be on-site to catch a problem the moment it starts.

See what AQI+ can tell you about your own properties. Book a demo and get a real look at what’s happening inside your units right now.