LTR 3
Ventilation Filters for ENERVENT LTR-3 (LTR-3 eWind, LTR-3 eAir)
Keep your ENERVENT LTR-3 ventilation unit (models LTR-3 eWind and LTR-3 eAir) running efficiently with high-quality filters that ensure clean indoor air, quiet operation and optimal energy efficiency. In this category you will find the original ENERVENT bag filter set, high-quality alternative pocket filters (F7, M5) and carbon filters for odour and VOC reduction, as well as an economy G4 filter set. All filters are designed for a perfect fit in ENERVENT LTR-3 units.
High-Quality Alternative Filters for ENERVENT LTR-3
Our alternative filters are fully compatible replacements for the original ENERVENT LTR-3 bag filters and offer excellent filtration performance at attractive prices. Alternative F7, M5 and carbon filters are sold per piece (not as a set), while the G4 economy pack is sold as a set of 6 filters.
Recommended Filter Combination: F7 + M5 (F7/ePM1 + M5/ePM10)
The recommended filter combination for ENERVENT LTR-3 (LTR-3 eWind, LTR-3 eAir) is:
- Supply air: F7 / ePM1 pocket (bag) filter
- Exhaust air: M5 / ePM10 pocket (bag) filter
This combination offers an ideal balance between indoor air quality, pressure drop and energy consumption. An F7 pocket filter on the supply side efficiently removes fine dust, pollen and many allergens, while an M5 pocket filter on the exhaust side protects the heat exchanger and fan.
You can order individual alternative filters here:
- Supply or exhaust air F7 pocket filter: ENERVENT LTR-3 F7 pocket filter
- Supply or exhaust air M5 pocket filter: ENERVENT LTR-3 M5 pocket filter
G4 Economy Filter Pack (6 pcs) for ENERVENT LTR-3
- Filter class: G4 (coarse filter)
- Quantity: 6 pcs in one set
The G4 economy filter pack for ENERVENT LTR-3 contains 6 filters in one set and can be used on both supply and exhaust air. It is intended for situations where high filtration quality (M5 or F7 level) is not needed and lower-cost, basic filtration is sufficient.
G4 filters provide simple, coarse dust protection and are a good choice for technical rooms, garages or areas with low air quality requirements, where the main goal is to protect the unit rather than maximise indoor air cleanliness.
Order the G4 economy filter pack (6 pcs) here: ENERVENT LTR-3 G4 economy filter pack (6 pcs)
Alternative Carbon Filter for ENERVENT LTR-3 (Supply Air)
For users who want to reduce odours and chemical pollutants, we offer a carbon filter for the supply air side. This filter combines particle filtration with activated carbon for odour and VOC reduction and is sold per piece.
- Reduces smells from traffic, cooking, neighbours and industrial areas
- Adsorbs VOCs (volatile organic compounds) from outdoor and indoor sources
- Ideal for city centres, busy roads or odour-sensitive users
Order your carbon supply filter for ENERVENT LTR-3 here: ENERVENT LTR-3 carbon filter
Example Alternative Filter Combinations
Because alternative F7, M5 and carbon filters are sold per piece and G4 is available as an economy pack, you can configure many combinations for LTR-3 eWind and LTR-3 eAir:
- F7 (supply) + M5 (exhaust) – recommended combination
- F7 (supply) + F7 (exhaust)
- M5 (supply) + M5 (exhaust) using individual M5 pocket filters
- Carbon (supply) + M5 (exhaust)
- Carbon (supply) + F7 (exhaust)
- G4 (supply) + G4 (exhaust) – economy option where only basic filtration is required
Original ENERVENT Filter Set for LTR-3 – Art. 471 010 935
We supply the original ENERVENT filter set, 100% compatible with ENERVENT LTR-3 (LTR-3 eWind, LTR-3 eAir) units. The original set is delivered as a complete bag filter set (supply + exhaust) and uses the F7 + M5 combination.
Original F7 + M5 Bag Filter Set – Art. 471 010 935
- Supply air: F7 / ePM1 pocket (bag) filter
- Exhaust air: M5 / ePM10 pocket (bag) filter
This original ENERVENT bag filter set provides very good indoor air quality with reasonable energy consumption, while protecting the ventilation unit and duct system from dust. It corresponds to the recommended F7 (supply) + M5 (exhaust) combination.
Order the original ENERVENT LTR-3 filter set here: Original ENERVENT LTR-3 F7 + M5 bag filter set (Art. 471 010 935)
Which ENERVENT LTR-3 Filter Combination Should I Choose?
- Best overall balance (recommended): F7 (supply) + M5 (exhaust) – available as the original bag filter set (Art. 471 010 935) or using individual alternative F7 and M5 pocket filters.
- Maximum cleanliness / allergy / city centre: F7 + F7 with individual alternative F7 pocket filters, optionally with a carbon filter on the supply side.
- Lowest energy consumption / quietest operation: M5 + M5 using individual M5 pocket filters.
- Odour & VOC problems: Carbon filter on the supply air side, combined with either M5 or F7 on the exhaust side.
- Lowest cost / basic protection only: G4 (supply) + G4 (exhaust) using the G4 economy pack where only simple coarse filtration is needed.
FAQ – ENERVENT LTR-3 Filters
How often should I change filters in my ENERVENT LTR-3?
In normal conditions, filters should be replaced every 6–12 months. In dusty or high-pollution areas, or if you have pets or allergies, we recommend checking and possibly replacing them more frequently. Visually inspect the filters at least every 3–4 months.
Are alternative filters safe for my ENERVENT LTR-3?
Yes, as long as they are high-quality and made to the correct size and filter class (G4 / M5 / F7 / ePM classes). Our alternative pocket and carbon filters for ENERVENT LTR-3 are designed as precise replacements for the originals and match or exceed their filtration performance. Both the original bag filter set and alternative single filters are suitable; the key is to use the recommended F7 + M5 combination where possible.
What is the difference between G4, M5 and F7 filters?
G4 is a coarse filter that provides basic filtration and is used where only simple dust protection is required and high filtration efficiency is not necessary. M5 (ePM10) stops medium and coarse dust and is sufficient in cleaner environments. F7 (ePM1) filters very fine particles such as fine dust, smoke and many allergens, providing higher indoor air quality. For most users, F7 on the supply air side and M5 on the exhaust side is recommended, while G4 is an economy option for low-demand applications.
When should I use a carbon filter?
Use a carbon filter on the supply air side if you want to reduce:
- Traffic, industrial or city odours
- Cooking smells and tobacco smoke entering from outside
- VOCs (volatile organic compounds) from outdoor air or nearby sources
Do dirty filters increase energy consumption?
Yes. Clogged or very dirty filters cause higher pressure drop, so the fans must work harder and consume more electricity. Regular filter replacement keeps your ENERVENT LTR-3 (LTR-3 eWind, LTR-3 eAir) efficient, quiet and reliable, while maintaining high indoor air quality.
