Vent-Axia Sentinel Econiq ISO 60% Coarse Filter 2 Pack 411690

Vent-Axia 411691 — Sentinel Econiq M, L, MCP, LCP and Cool-Flow ISO 60% Coarse (G4) Replacement Filter, Pack of 2.

This is the genuine OEM ISO 60% Coarse (G4) replacement filter set for various Vent-Axia heat recovery models, supplied as a pack of 2. Compatible with the Sentinel Econiq M, L, MCP, LCP, and Cool-Flow MVHR units, it replaces the standard G4 filters on both the supply and extract air paths — protecting the heat exchanger and maintaining the airflow performance the unit was designed to deliver. Regular replacement is essential to sustain Building Regulations Part F compliance and keep the system operating at its commissioned specification. 

What the G4 Filter Does

The ISO 60% Coarse (G4) filter is the standard grade supplied with these Sentinel Econiq units as fitted. It captures sand, fine hair, and particles larger than 10 microns from both the incoming supply air and the outgoing extract air — preventing particulate build-up on the heat exchanger core that would otherwise progressively reduce heat recovery efficiency and increase fan running resistance. As filters load up over time, airflow resistance rises and system performance falls, making timely replacement the single most important routine maintenance task for the installation.

Wider Compatibility Across the Econiq Family

This filter pack covers the larger Sentinel Econiq M and L units and their MCP and LCP variants, as well as the Cool-Flow configuration — a broader compatibility than the Sentinel Econiq S filter pack (411689), which uses a different filter size. Specifiers and installers managing multiple dwelling types across a development can simplify stock management by noting which unit variants share the same filter size.

Upgrade Options Available

Higher-grade supply air filters are available for occupants requiring improved indoor air quality. An ISO ePM10 50% (M5) pollen filter captures particles down to 10 microns including pollen and fine dust, and an ISO ePM2.5 70% (F7) filter captures particles down to 2.5 microns including mould spores, bacteria, and fine particulate matter from exhaust fumes. These upgrade filters replace the supply air filter only; the extract side continues to use the standard G4 filter supplied in this pack.

Key Features of the Vent-Axia Sentinel Econiq M/L/MCP/LCP/Cool-Flow G4 Replacement Filter 411691 Include:

• ISO 60% Coarse (G4) Standard Filter — Captures Sand, Fine Hair & Particles Larger Than 10µm
• Standard Grade Supplied with Sentinel Econiq M, L, MCP, LCP & Cool-Flow Units as Fitted — Like-for-Like Genuine OEM Replacement
• Pack of 2 — One Full Replacement Set per Pack (Supply and Extract Filters)
• Protects Heat Exchanger Core — Prevents Particulate Build-Up That Reduces Efficiency Over Time
• Compatible with Vent-Axia Lo-Carbon Sentinel Econiq M, L, MCP, LCP & Cool-Flow MVHR Range
• Higher-Grade Supply Air Filters Also Available — M5 (ePM10 50%) for Pollen; F7 (ePM2.5 70%) for Mould Spores & Bacteria
• Recommended Replacement Interval: At Least Every 12 Months (Check at 3 Months Post-Installation; Every 6 Months Thereafter)
• Sector: New Build, Residential

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