Air filtration set SpiroFlex Filtration Set ePM1 55% 208x340x45mm + 2× ISO Coarse G3 200x340mm

SpiroFlex Filtration Set ePM1 55% 208x340x45mm + 2× ISO Coarse G3 200x340mm is a replacement filter kit for HVAC air handling units. The set contains one pocket-type fine filter with ePM1 55% efficiency and two flat ISO Coarse G3 prefilters sized to match common residential and light-commercial ventilation housings. Together these filters remove fine particulate matter and larger dust particles to reduce contamination of heat exchangers, fans and ductwork while helping maintain airflow and indoor air quality.

Advantages

The combination of an ePM1 55% pocket filter and two G3 coarse filters provides staged filtration: coarse dust is captured by the G3 layers, extending the service life of the finer pocket filter. The pocket filter’s media is designed for consistent removal of submicron and 1 µm-range particles at the stated efficiency, while the flat G3 elements offer low pressure drop and easy replacement. The set is dimensioned for simple installation in compatible housings and supports routine maintenance schedules without special tools.

Suitable for

• Residential ventilation systems and heat-recovery units
• Small offices and light-commercial HVAC units
• Routine filter replacement and preventive maintenance
• Protecting fans, coils and ductwork from dust accumulation

Key specifications

• Fine filter type: pocket filter, ePM1 55% efficiency
• Fine filter nominal dimensions: 208 × 340 × 45 mm
• Prefilters: ISO Coarse G3 flat filters, two pieces
• Prefilter nominal dimensions: 200 × 340 mm each
• Filtration stages: two-stage (coarse prefiltration + fine pocket filtration)
• Typical application: HVAC air handling units in residential and light commercial settings

How to use

Turn off the ventilation unit or isolate the section of ductwork before accessing the filter compartment. Remove the old filters and inspect the housing for accumulated dust and debris; clean the compartment if necessary. Insert the two ISO Coarse G3 flat filters in the prefilter positions, ensuring correct orientation and a snug fit, then install the ePM1 55% pocket filter in the downstream pocket slot. Restore the unit cover, power the system, and verify normal airflow and pressure. Follow the ventilation manufacturer's instructions for safe handling and disposal of used filters.

Usage recommendations

Replace filters according to the operating environment and pressure-drop indicators: in typical residential use change prefilters and pocket filter at regular maintenance intervals or when a significant pressure rise is observed. In dusty or high-pollution environments check filters more frequently. Ensure compatible filter seat dimensions and maintain a small inventory of replacement sets to avoid interruptions in ventilation performance.