Filtration and Replacement Filters Hub
Breathe better air. Protect your system. Keep performance on track.
High-performance ventilation and filtration go hand-in-hand. Filters are the quiet workhorses of healthy indoor air: they capture fine particles, reduce dust buildup inside your equipment, and help your ventilation system deliver consistent airflow year after year.
This hub is your starting point for replacement filters, maintenance resources, and filter guidance—whether you’re a homeowner managing routine upkeep or a professional supporting multiple projects.
Shop Zehnder and Fresh-r Filters by System
Zehnder Replacement Filters
If you own a Zehnder ventilation system, replacing filters on schedule is one of the simplest ways to protect airflow, reduce fan strain, and keep indoor air quality where it should be.
→ Shop Zehnder Filters
→ Zehnder Systems Overview
What to buy: Most Zehnder owners replace supply and exhaust filters as a set. If your site supports it, consider a “Filter Sets” section within the collection (or a featured collection block on this hub).
Want to Learn More about Zehnder Maintenance and Filters?
Check out these Small Planet Supply blog posts:
- The Importance of Maintaining and leaning Your Zehnder Heat Recovery Ventilation System
- Zehnder: Exterior Maintenance Keeps Clean Air Flowing
- Three Types of Filters that Keep Your Zehnder Keep Indoor Air Clean
- FAQs: The Importance of Commissioning a Zehnder HRV or ERV system
Fresh-r Replacement Filters
Decentralized ventilation still depends on clean filtration. Fresh-r filter maintenance helps keep airflow strong and ensures the unit performs as intended—especially in smoky seasons, pollen peaks, or urban environments.
→ Shop Fresh-r Filters
→ Fresh-r Systems
Filter Replacement Made Simple
1) Replace on a predictable schedule
A regular filter routine is the easiest “set it and forget it” indoor air quality upgrade.
Typical cadence (general guidance):
- Every 3–6 months for most homes
- More often if you have pets, wildfire smoke exposure, allergy sensitivities, construction dust, or high outdoor particulates
(If you want, we can add a simple visual schedule chart to this page later.)
Match the right filter to your unit
Filters aren’t one-size-fits-all. Model compatibility matters.
Find the right Zehnder filter for your system
Don’t skip exterior intake maintenance
Even the best filters can’t compensate for restricted outdoor airflow. Keeping the exterior intake grille clean supports balanced airflow and helps reduce premature filter loading of your Zehnder System.
→Exterior grille cleaning guide
Filtration and Replacement Filter FAQs
How do I know when it’s time to replace my filters?
If you notice reduced airflow, more dust, stale indoor air, or you’ve gone beyond your normal replacement window, it’s time.
Should I replace both filters at the same time?
In most balanced ventilation systems, yes—replacing as a set helps keep airflow balanced and predictable.
Do filters improve indoor air quality?
Yes—filters capture airborne particles and help reduce the recirculation of dust and pollutants through your ventilation pathway.
What if I live in a wildfire smoke area?
Plan for more frequent changes during smoke season, and keep at least one replacement set on hand.
Do dirty filters affect ventilation efficiency?
Yes. Loaded filters restrict airflow, forcing fans to work harder and reducing heat-exchange efficiency. Clean filters support consistent airflow and quieter operation.
Can dirty filters make my ventilation system louder?
Yes. Restricted airflow from dirty filters can increase fan noise as the system works harder to move air through the unit.
Are Zehnder or Fresh-r filters washable or reusable?
Most ventilation filters are designed for replacement, not washing. Washing can damage filter media and reduce filtration effectiveness unless the manufacturer explicitly allows cleaning.
Have More Questions?
You can contact Small Planet Supply's customer service team at: 1-855-367-7442. Or use the form below to connect with us.