Free Delivery On all orders of MVHR filters.
30 Day Returns Return within 30 days for a full refund.
Reliable Support We’re here to help you.
British-Made Quality Proud members of Made in Britain®.
Rigid Bag Filters
Showing all 5 results
Activated Carbon F7 Rigid Bag Filter Compact Cassette
From: Price range: £74.41 through £149.62
E11 EPA Rigid Bag Filter Compact Cassette
From: Price range: £59.84 through £120.48
F7 Rigid Bag Filter Compact Cassette
From: Price range: £45.32 through £73.65
F9 Rigid Bag Filter Compact Cassette
From: Price range: £47.38 through £76.74
H13 HEPA Rigid Bag Filter Compact Cassette
From: Price range: £69.90 through £140.58
More About Rigid Bag Filters
The rigid bag filter is a V‑shaped wedge air filter, available in grades F7, F9, E11, H13 and F7 Activated Carbon, and housed in a durable hard plastic case. Rigid bag filters offer high dust holding capacity, low pressure drop and energy efficiency. This compact design allows the filter to replace standard synthetic bag filters or panel filters, and reduces labour costs due to less frequent filter changes. Find out more by reading our comprehensive overview of Rigid Bag Filters.
Also known as compact cassette filters, mini pleat compact filters, V-Bank and V-Filters, these cartridge filters are 292mm deep, with available header depths of 20mm and 25mm. The rigid bag filters are rated to an airflow of 2.54m/s relative face velocity and a continuous operating temperature of 80 degrees Celsius. Optional extras include galvanised steel mesh on the clean air side for burst protection in critical systems, such as in gas turbines, and neoprene seal on the top or bottom of the header for an airtight seal in front withdrawal systems.
Rigid bag filters are suitable for retrofitting in place of ordinary bag filters and for installation in most HVAC, HEVAC and Air Handling Unit (AHU) applications. They are frequently used in general air‑conditioning systems where space is limited, in systems handling large air volumes, and as pre‑filtration for higher‑efficiency filters.
Rigid bag filters deliver significantly higher performance than traditional bag filters, with measurable gains in arrestance, fine particle efficiency, dust holding capacity, pressure drop stability and service life. Their rigid V‑bank construction prevents the under‑inflation and turbulence issues that can affect conventional pocket bags in low or variable airflow conditions, allowing them to maintain consistent efficiency. The microfine glass fibre media packs provide a large, stable surface area, resulting in low initial resistance and high airflow capacity, while the robust plastic housing ensures long‑term durability and corrosion free operation. The microfine glass‑fibre media is inherently moisture‑resistant, eliminating any risk of paper‑media deterioration while providing stable filtration performance and high burst‑pressure protection even under demanding airflow or humidity conditions.
We also sell traditional synthetic Bag Filters too, a low cost and durable fine efficiency filter product. Shop Bag Filters.
What is the recommended replacement schedule for Rigid Bag Filters?
The recommended replacement schedule for Rigid Bag Filters can vary depending on several factors, such as the type of filter, the operating conditions of the system, and the level of filtration required. However, in general, it is recommended to replace Rigid Bag Filters every 6 to 12 months. This will ensure optimal performance and maintain indoor air quality.
What are the benefits of using Rigid Bag Filters in HVAC systems?
Rigid Bag Filters offer several benefits in HVAC systems. They offer high dust holding capacity, low pressure drop and energy efficiency. This compact design allows the filter to replace standard synthetic bag filters or panel filters, and reduces labour costs due to less frequent filter changes.
What is the difference between an F7 and F9 grade rigid bag filter?
F7 and F9 rigid bag filters are the same type of fine particle HVAC filter, with the main difference being how efficiently they capture the smallest particles. Both target the 0.3–1 micron range, but an F7 typically captures around 40–65% of these particles, while an F9 captures roughly 80–90%, giving it a noticeably higher fine‑dust performance.
To put that size into perspective, a human hair is about 60 microns in diameter, meaning a 0.3 micron particle is more than 200 times smaller.
What is the difference between an H11 and H13 grade HEPA rigid bag filter?
E11 and H13 filters are built on the same principal, however E11 grade rigid bag filters are EPA (Efficient Particulate Air) filters, whereas H13 rigid grade bag filters are HEPA (High-Efficiency Particulate Air) filters. Both target the 0.3–1 micron range, but an E11 filter typically removes around 98% of these particles, while an H13 filter captures more than 99.99%, and 99.95% of particles between 0.1–0.2 microns.
How do I choose the right Rigid Bag Filter for my HVAC system?
Choosing the right Rigid Bag Filter for your HVAC system depends on several factors, including the type of contaminants you need to remove, the airflow rate of the system, and the required level of filtration efficiency. In general, higher-grade filters (such as F9 or H13) offer greater filtration efficiency, but may also restrict airflow more than lower-grade filters (such as F7 or H11). It's important to consult with an HVAC professional to determine the best filter for your specific needs. If you need help, please don't hesitate to get in touch with us.