Can I change my HRV filter myself?
Yes. In most homes, you can replace an HRV (heat recovery ventilator) filter on your own, provided you follow the manufacturer’s instructions and take basic safety precautions. Doing so can keep your system running efficiently and maintain indoor air quality.
Understanding HRV filters and maintenance
HRV systems move air through your home while recovering heat, and filters protect the core and the indoor environment by capturing dust, pollen, and other particles. Replacement intervals vary by environment, usage, and filter type, but many systems recommend replacement every 6 to 12 months. Some filters are disposable, while others are washable or reusable—always use the filter type specified by your unit’s manual. If you’re unsure, start by identifying your model and checking the manufacturer’s guidance online.
Tools and considerations before you start
- Identify your HRV model and the exact filter type (panel, cartridge, or bag-style) and its dimensions.
- Check the manufacturer’s recommended filter rating (often a MERV rating) and replacement interval.
- Gather supplies: a new filter, protective gloves, a flashlight, a soft brush or cloth, and a screwdriver if needed to access the panel.
- Power down the unit and, if possible, shut off the breaker to eliminate any risk of sudden startup.
- Note filter orientation (airflow arrows) before removal to ensure correct installation.
- Inspect the filter housing for mold, moisture, or damage that would require extra cleaning or professional attention.
Having the right filter and proper orientation helps ensure optimal airflow and energy efficiency after replacement.
Step-by-step guide to replacing the HRV filter
Follow these steps to replace the filter in a typical residential HRV unit. Model variations exist, so refer to your manual for specifics.
- Turn off the HRV and disconnect it from power at the breaker or power switch. Confirm there is no airflow.
- Open the filter access panel or housing cover to reach the filter compartment.
- Carefully remove the old filter. If it’s dirty, shake or brush off loose dust over a trash receptacle and avoid releasing dust into your living space.
- Inspect the filter housing for signs of mold, moisture, or damage. Wipe the interior with a damp cloth and let it dry if needed.
- Insert the new filter, ensuring it matches the correct size and that the airflow arrows point in the correct direction as indicated on the filter or unit.
- Reattach the access panel securely. Restore power to the unit and run it on a low setting for several minutes to verify normal operation and airflow.
- Check for any unusual noises, vibrations, or leaks around the panel. If everything seems normal, resume regular operation.
- If your unit has a maintenance timer or reminder, reset it according to the manual.
Properly replacing the filter and resealing the access panel helps maintain air quality and prevents energy waste.
When to call a professional
DIY is suitable for many homeowners, but certain situations call for professional service to avoid damage or void warranties.
- Your HRV is under warranty and the manual requires authorized service for filter changes.
- You cannot locate the filter, access is blocked, or you encounter difficult or dangerous installation conditions.
- There is visible mold growth in the housing or ductwork, or you notice persistent moisture issues.
- The unit makes unusual noises, emits burning smells, or shows signs of electrical problems after replacement.
- Your system is integrated with other HVAC components or gas appliances, and you’re unsure how changes might affect safety or combustion air.
- You’re uncomfortable working around electrical panels, ducts, or in tight spaces.
In these cases, a qualified HVAC technician can ensure correct filter sizing, proper sealing, and safe operation while protecting warranties and ensuring indoor air quality.
Summary
Most residential HRV filter changes are well within a homeowner’s reach. By identifying your model, using the correct filter, following safety steps, and consulting the manual for model-specific guidance, you can perform a DIY change effectively. Remember to monitor your system after replacement and seek professional help if you encounter access, mold, electrical, or warranty concerns. Regular filter maintenance supports energy efficiency and better indoor air quality.
