- HEP Heat and Air
- HEPA Filtration

HEPA Filtration
HEPA Filtration | Ventilation and Air Quality | Heating and Air Conditioning | Duff
When the crisp Duff mountain air meets indoor comfort, HEP makes sure nothing but freshness flows through your home or business. Our HEPA-grade filtration, paired with precision-engineered heating and cooling systems, captures 99.97% of airborne particles—dust, pollen, smoke, even the microorganisms you can’t see but definitely don’t want to breathe. You get whisper-quiet performance, lower energy bills, and the peace of mind that every inhale is as pure as the Highlands themselves.
From new-build installations to retrofits in historic cottages, our technicians design solutions that optimize airflow, balance humidity, and protect your family’s health. Whether you’re chasing relief from seasonal allergies or striving for a cleaner workspace, HEP is Duff’s trusted partner for superior ventilation and air quality. Breathe easier—call us today and feel the difference clean air can make.
FAQs
What is a HEPA filter and how does it improve indoor air quality?
HEPA (High-Efficiency Particulate Air) filters are manufactured to capture at least 99.97 % of airborne particles down to 0.3 microns—the size range that is hardest to trap. When installed in a heating and air-conditioning system, a HEPA filter removes dust, pollen, mold spores, pet dander, most bacteria, and some viruses from the airstream. This results in cleaner air circulating through your Duff home or business, reducing allergy symptoms, respiratory irritation, and lingering odors.
How often should HEPA filters be replaced or cleaned?
Unlike standard HVAC filters that are replaced every 30-90 days, true HEPA filters typically last 12-18 months in a residential setting, or 6-12 months in a commercial or high-traffic environment. The exact interval depends on factors such as local Duff pollen levels, nearby construction dust, the presence of pets, and overall system run time. Because HEPA media cannot be washed without damaging its fiber matrix, replacement—not cleaning—is recommended. Our technicians record the installation date on each filter and can schedule automatic reminders so you never miss a change-out.
Can a HEPA filtration unit be integrated into my existing heating and air-conditioning system in Duff?
Yes. We offer in-duct HEPA filtration modules that retrofit into most forced-air systems without major reconstruction. After inspecting your equipment, we size a HEPA cabinet to match your airflow (CFM) and static-pressure limits, then install it in the return-air plenum. If your blower motor is marginal, we may recommend an ECM upgrade to overcome the added resistance of the HEPA media. The entire process usually takes one day, requires no drywall work, and is fully reversible should you sell the property.
What indoor pollutants does a HEPA-equipped HVAC system remove?
A true HEPA filter captures: • Household dust and lint • Tree, grass, and ragweed pollen common to the Duff area • Pet dander and hair fragments • Mold and mildew spores • Smoke particles from cooking, fireplaces, or nearby wildfires • Most bacteria and some viruses attached to droplets • Fine construction debris such as drywall dust. For gases, odors, or chemicals (VOC’s), we pair the HEPA module with an activated-carbon stage to achieve broad-spectrum air purification.
How does proper ventilation work with HEPA filtration to optimize indoor air quality?
HEPA filters clean recirculated air but do not address carbon dioxide buildup or humidity levels. Mechanical ventilation—either an Energy Recovery Ventilator (ERV) or a Heat Recovery Ventilator (HRV)—introduces fresh outdoor air while exhausting stale indoor air. When combined with HEPA filtration, the system first brings in tempered outdoor air, then passes it through the HEPA filter before it is distributed through your ducts. This two-step approach keeps pollutant and CO₂ levels low, controls moisture, and maintains consistent comfort year-round in Duff’s variable climate.
Will adding a HEPA filter increase my utility bills?
Because HEPA media is denser than standard filters, it creates additional airflow resistance. However, when properly sized and paired with an efficient variable-speed blower, the energy impact is minimal—typically less than a 5 % increase in fan power. In many Duff homes we offset this small rise by sealing duct leaks and optimizing system airflow. The health benefits and extended equipment life (thanks to cleaner coils and motors) usually outweigh the modest operating cost.