Systemair BFR 355 400 Coarse 70% Filter M5
Systemair BFR 355 400 Coarse 70% Filter M5
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Delivery and Warranty
Standard UK Mainland Delivery
If you are not in a rush, then we offer standard delivery and your order should be with you between 2-3 working days.
£7.95
Next Working Day Delivery
Place your order before 12pm Monday to Thursday and receive your order the next working day. Orders placed on Friday before 11am will be processed and delivered on Monday. (Excludes Sunday’s and Public Holidays)
£15.95
Nominated Day Delivery
We know sometimes you will need an order on a particular date in the future. Simply select this option at checkout and add what date you would like to receive the order. We will then contact you to confirm the date. If you need to change this order date then please contact us ASAP.
£15.95
Northern Ireland Delivery
We offer a flat fee rate for Northern Ireland orders, and all are 5-7 working day lead times.
£29.95
Scottish Highlands & Islands Delivery
We only offer a flat fee rate for Scottish Highland & Islands orders, and all are 5-7 working day lead times.
£45.95
Channel Islands Delivery
We only offer a flat fee rate for Channel Islands orders, and all are 5-7 working day lead times.
£45.95
Product Details
Specifications
Product specifications
| Brand | Systemair |
| Model | BFR 355-400 |
| Type | Bag filter |
| Filter class | M5 (Coarse 70% per ISO 16890) |
| Fits | FFR 355 and 400 |
| Number of bags | 3 |
| Media | Synthetic fibre |
| Dimensions (H x W x D) | 432 x 432 x 450 mm |
| Weight | 0.7 kg |
| Filters required per box | 1 |
Summary
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Item Number: 5243
Bag filter suitable for filter cassettes FFR 355 and 400. Dimension 432x432x450/3. Filter media EU5/M5.
Technical parameters
| Filter | ||
|---|---|---|
| Used for | FFR 355, 400 | |
| Required number of filters | 1 | pcs/unit |
| Number of bags | 3 | pcs |
| Filter class | Coarse 70% |
| Dimensions and weights | ||
|---|---|---|
| Depth | 450 | mm |
| Height | 432 | mm |
| Width | 432 | mm |
| Weight | 0.7 | kg |
Product Description
Item Number: 5243
Bag filter suitable for filter cassettes FFR 355 and 400. Dimension 432x432x450/3. Filter media EU5/M5.
Technical parameters
| Filter | ||
|---|---|---|
| Used for | FFR 355, 400 | |
| Required number of filters | 1 | pcs/unit |
| Number of bags | 3 | pcs |
| Filter class | Coarse 70% |
| Dimensions and weights | ||
|---|---|---|
| Depth | 450 | mm |
| Height | 432 | mm |
| Width | 432 | mm |
| Weight | 0.7 | kg |
Delivery & Returns
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What does this filter fit?
It is a replacement bag filter for the Systemair FFR filter box, also known as a filter cassette, covering the FFR 355 and 400 sizes in Systemair duct ventilation systems.
What grade is this filter and what does it capture?
It is an M5 filter, rated ISO 16890 Coarse 70%, so it captures dust and pollen plus a higher proportion of finer particles than a G3 filter.
When should I replace it?
Replace the bag filter at your regular service intervals, or sooner if you notice reduced airflow, because a blocked filter raises resistance and makes the system work harder.
What is the difference between G3 and M5?
A G3 filter (Coarse 50%) captures larger, coarser particles, while an M5 filter (Coarse 70%) is finer and removes more of the smaller particles. Choose M5 where cleaner air or greater protection is needed, and G3 for general coarse dust.
How do I choose the right size?
Match the filter to your FFR box size, which usually follows the duct diameter. This BFR 355-400 filter suits the FFR 355 and 400 boxes; if your box is a different size, choose the matching BFR filter.
Is this a single filter or a pack?
This is supplied as one bag filter, which is the quantity required to fit a single FFR filter box. Order more than one if you want spares or have several boxes to service.