Frequently Asked Questions


At AirGuard, we believe that knowledge is the first step toward healthier living. By empowering our customers, we give them the tools and information they need to better understand the presence and potential health implications of indoor mold. We encourage and support proactive decision-making — because when you are informed, you can take meaningful action to protect your health, your family, and your home.

  • Where Should I Install the AirGuard Device?

    Installation Guidelines for AirGuard

    Proper placement of your AirGuard device ensures it works effectively to clean the air in your home and protects your HVAC system. Here’s how to install it the right way — simply and safely.


    Best Places to Install AirGuard

    Inside Your HVAC System (Return Duct Only)

    If you're installing AirGuard in your ductwork, it must go in the return duct only — this is where air is pulled back into the system for heating or cooling.

    đź”’ Do not install in the supply duct — the side that pushes air into your home — as this may damage the unit or HVAC components.


    Crawlspace

    The crawlspace is an excellent place to install AirGuard, especially if your HVAC system or ductwork runs through it. You can:


    Attach it to a floor joist using the included mounting hardware.


    Set it on or near the air handler, as long as it's stable and has access to power.


    Other Acceptable Indoor Areas

    As long as there’s an accessible electrical outlet, these locations are also ideal for AirGuard placement:

    • Attics
    • Basements
    • Interior rooms
    • Utility or mechanical rooms
    • Any area of concern (e.g., musty storage rooms, pet zones, or home offices)

    Avoid Installing in These Areas

    Supply Ducts (Blow-out Side)

    This side of the HVAC pushes air into your rooms. Installing AirGuard here can reduce system performance and is not recommended.


    Outdoor or Damp Areas

    AirGuard is designed for indoor use only and must be kept dry.


    Need a Hand?

    If you’re unsure where your return duct or crawlspace setup should go, we’re here to help. Contact our team for step-by-step guidance.

  • What is the Blynk App?

    The Blynk app connects to your AirGuard indoor air quality monitor, allowing you to:

    • View real-time air quality data
    • Monitors temperature, humidity, days to mold growth, and probability of mold.
    • Receive alerts and historical trend reports

  • How to Install and Set Up the App?

    • Download the Blynk IoT app:
    • iOS – App Store
    • Android – Google Play
    • Scan the QR code included with your AirGuard device.
    • Follow the in-app prompts to complete Wi-Fi setup.
    • Watch the AirGuard Tutorial for more details.

  • What If the App Won’t Connect?

    • Ensure your phone and the AirGuard unit are on the same Wi-Fi network.
    • Check Wi-Fi settings and manually search for the device.
    • Restart both the app and device.
    • Verify your Wi-Fi credentials or scan the QR code again.

  • What is the Device Warranty?

    Your AirGuard device is guaranteed to be free from defects in materials and workmanship under normal residential or commercial use for a period of one (1) year from the original date of purchase.


    If a defect arises during the warranty period, we will, at our discretion:

    • Replace the defective unit with a new or refurbished AirGuard device at no charge to you.
    • Provide support to ensure your replacement is installed properly and functioning optimally.

    Important Installation Requirement

    To qualify for this warranty, the AirGuard device must be installed according to the official installation guidelines.

    Improper installation — including installation in a supply duct or in conditions outside the recommended parameters — will void the warranty.


    Please refer to our Installation Guidelines in the FAQs above or contact our support team for details to ensure your setup is compliant.


    What's Included

    • Full replacement of the AirGuard unit in case of manufacturer defect. 
    • Expert technical support throughout the warranty period.

    What’s Not Covered

    This warranty does not cover:


    • Damage due to misuse, neglect, or improper installation.
    • Unauthorized repairs or modifications.
    • Cosmetic damage that does not affect device performance.
    • Issues caused by environmental factors (e.g., lightning, floods, etc.).

    How to Claim

    To initiate a warranty claim, please contact info@airguard.com with the following:


    • Proof of purchase or installation date.
    • Description of the issue.
    • Photos or documentation if applicable.

    We'll guide you through the simple and quick replacement process.

  • What Data Can I Track on the App?

    You can track live and historical data for:

    • Temperature and Humidity
    • Predicted Days to Mold Growth

  • Why Are My Air Quality Readings Changing so Quickly?

    AirGuard measures your indoor air in real time and is sensitive to environmental changes. Fluctuations are normal and often caused by:

    • Doors or windows opening/closing
    • HVAC system cycling
    • Weather or humidity changes
    • Cooking, cleaning, or aerosol sprays
    • Movement of people or pets
    • Heat or sunlight near the device

    To smooth out the data, check the trend graphs in the Blynk app.

  • Why Did I Get a Mold DETECTION Alert? What Should I Do?

    Alert Message:   “Critical Alert: AirGuard has detected a greater than 90% probability of the presence of mold. It is recommended to confirm with a certified inspector.”


    What it means:

    This means that based on real-time sensor data, your AirGuard unit has identified environmental patterns strongly associated with active mold presence. 


    What to do:

    • Inspect crawl spaces, attics, and heating/air conditioning ductwork  and units
    • Contact a certified mold inspector for confirmation: 

    NAMRI National Association of Mold Remediators and Inspectors 


    IICRC Institute of Inspection Cleaning and Restoration Certification  


  • Why Did I get a Forecasted Mold GROWTH Alert? What Should I Do?

    Alert Message:   “Critical Alert: Based on environmental conditions, mold may grow within 30–90 days.”


    What it means:

    This is a predictive alert, meaning your current environmental conditions are ideal for mold to begin growing soon if no action is taken.


    What to do:

    • Lower indoor/area humidity (below 60%)
    • Fix leaks and moisture-prone areas
    • Consult a trusted HVAC or crawlspace professional

  • I Don’t See any Mold — Why Should I Take Action?

    Even if mold isn’t visible, AirGuard has detected environmental conditions that are ideal for mold growth within the next 30–90 days.


    High humidity, warm temperatures, and poor airflow can cause mold to grow behind walls, in crawlspaces, or inside HVAC systems—places you can’t easily see.


    Mold can:

    • Trigger asthma, allergies, and respiratory issues
    • Grow undetected behind walls or in HVAC systems
    • Cause odors and expensive damage

    The alerts are your chance to stop mold before it starts. Early action saves money, protects your health, and prevents long-term issues. 


    The Bottom Line: Prevention is Protection!

  • Why did I get a Mold DETECTION alert but not a Forecasted Mold GROWTH Alert? What does this mean?

    It is possible to receive a mold detection alert, even if the environment is not currently forecasted for mold growth. This usually means mold had already begun growing in hidden areas, like: HVAC coils, ductwork, crawlspace, behind walls or floors.


    Even though conditions have improved and mold is not likely to grow further, spores or VOC signatures may still be present from existing, hidden growth.

  • Where Can I Learn More about Mold and Air Health?

    We suggest these trusted health sources: