Ambient Air Filters for Outdoor Cabinets
GORE® Cooling Filters provide years of maintenance-free life to sensitive electronics through ambient air cooling, without the risk of corrosion from airborne contaminants.
Highly Reliable Cooling Technology
GORE Cooling Filters (GCF) enable you to lower your system costs by taking full advantage of the natural thermal efficiencies of ambient air. Our filters provide years-long protection against harmful contaminants and corrosion and require no regular maintenance.
Increased Reliability, Longer System Life and Lower Costs
GORE Cooling Filters, offered in a variety of sizes, offers the most efficient and reliable cooling technology available for outdoor electronic enclosures.
- High efficiency membrane protects from even submicron particles. Our unique filter material allows the flow of clean air to cool system electronics inside your enclosure. It provides E12 particle filtration efficiency according to EN188 and easily meets an IP6X dust rating.
- Protection against salts and corrosive elements. GORE Cooling Filter’s inert membrane easily screens out damaging salt sprays and other corrosives ensuring longer life for system electronics and cabinetry.
- Watertight construction. The filter's hydrophobic membrane, ABS polymer frame, and robust sealing system prevent water ingress in alignment with an IPX5 ingress protection rating.
- High durability, lower operating costs. GORE Cooling Filter’s ruggedized construction and minimal replacement parts significantly reduces ongoing maintenance and service costs.
Outdoor electronic equipment can benefit from direct air cooling. GORE® Cooling Filters can be can be integrated into a variety of enclosure designs in application in telecommunications systems, digital signage, power storage and transfer stations, and others.
Direct Air Cooling Benefits
Unlike closed loop systems like AC and HEX, GORE Cooling Filters (GCF) enable the use of Direct Air Cooling (DAC) – one of the most energy-efficient cooling methods available. With DAC, you can benefit from lower power consumption while also reducing capital and operational costs.
Delta T Ambient / Exhaust [K]
Improves Thermal Efficiency
- No thermal transfer loss
- Better Watts/K cooling capacity
- More uniform airflow through cabinet
- Wider temperature deployment range
Relative Energy Consumption (%)
Lower Operational Costs
- Uses less energy than AC and HEX
- Requires less maintenance
- Significantly improves MTBF
AVG Cost at 200 Watt/k
Lower Capital Expenses
- Cost much less than air conditioning
- Lower power consumption reduces the back-up energy requirement
- Simplifies component placement
Weight [kg]
Smaller Size and Less Noise
- Smaller installation area for a given cooling capacity
- Lower weight reduces transportation and installation costs
- No external fans for lower noise emissions
Membrane vs Non-Membrane Filters
Reliable protection of system electronics requires highly efficient filtering of ambient air to remove submicron particles and aerosols while also preventing water ingress into the cabinet.
Membrane Filter (500X SEM)
The Gore membrane’s microporous structure provides higher filtration efficiency and high water resistance.
Non-Membrane Filter (500X SEM)
The open structure of non-membrane filters lets dust and small particles pass right through into cabinet.
Membrane Filter Media
- Provides 99.5% particle filtration efficiency at the 0.1um level yet still allows high airflow
- Eliminates costly equipment failures caused by corrosion and other pollutants
- Offer longer, maintenance free lifetimes vs. non-membrane alternatives
Unlike conventional non-membrane filters, GORE Cooling Filters have been specifically developed for outdoor cooling and protection under extreme environmental and climatic conditions.
GORE® Membrane offers the lowest pressure drop at a given filtration efficiency, allowing you to select smaller fans and limit noise pollution.
Technical Specifications
Construction Materials
| Frame | ABS Black |
|---|---|
| Membrane | Hydrophobic ePTFE |
| Pleated Filter Media | Fully Synthetic Composite |
| Potting | Polyurethane |
| Gasket | Polyurethane Foam/Thermoplastic Elastomer |
Product Performance
| Operating Temperature | –40 to +65 °C |
|---|---|
| Humidity Range | 0 to 100% RH |
| Filtration Efficiency | > 99.5% (@ 0.1 μm, 1 cm/sec) |
| Filtration Class | EN1822 – E12 |
| Flammability | UL 900 |
| Typical Filter Lifetime | Up to 5 years (based on application)2 |
2 Installation location impacts PM10 air pollution assumptions used in lifetime projections
The Filter Performance table shows relative performance at standard parameters. Specific calculations are required for individual installations and may differ from standard parameters.
Gore application engineers can help you determine your heat dissipation needs and calculate the recommended filter performance and size for your specific application.
Typical Performance Characteristics per Filter Size
| Part Number | Filter Attributes | Filter Performance | |||||
|---|---|---|---|---|---|---|---|
| Height (mm) | Width (mm) | Depth (mm) | Weight (kg) | Maximum Air Flow (m3/hr) | Equivalent Heat Dissipation Capacity (W) 1 | New Filter Pressure Drop (ΔP) vs. Airflow (Q) Curves | |
| CF541163 | 692 | 500 | 48 | 2.7 | 500 | 1613 | ΔP (Pa) = 0.11 x Q (m³/h) |
| CF541211 | 200 | 345 | 90 | 1.2 | 162.5 | 524 | ΔP (Pa) = 0.34 x Q (m³/h) |
| CF541237 | 605 | 454.5 | 57.2 | 2.2 | 450 | 1452 | ΔP (Pa) = 0.12 x Q (m³/h) |
| CF541238 | 455 | 305 | 57.2 | 1.2 | 200 | 645 | ΔP (Pa) = 0.28 x Q (m³/h) |
| CF541239 | 305 | 230 | 57.2 | 0.7 | 100 | 323 | ΔP (Pa) = 0.56 x Q (m³/h) |
| CF541242 | 605 | 455 | 80 | 3.3 | 625 | 2016 | ΔP (Pa) = 0.09 x Q (m³/h) |
| CF541252 | 305 | 455 | 57.2 | 1.2 | 212.5 | 685 | ΔP (Pa) = 0.26 x Q (m³/h) |
| CF541257 | 494 | 440 | 57.4 | 1.9 | 337.5 | 1089 | ΔP (Pa) = 0.17 x Q (m³/h) |
| CF541258 | 850 | 440 | 57.2 | 3.0 | 625 | 2016 | ΔP (Pa) = 0.09 x Q (m³/h) |
| CF551278 | 205 | 440 | 80 | 1.2 | 187.5 | 605 | ΔP (Pa) = 0.30 x Q (m³/h) |
| CF551279 | 440 | 440 | 80 | 2.4 | 450 | 1492 | ΔP (Pa) = 0.12 x Q (m³/h) |
- Fan Selection: Choosing the right fan with the appropriate level of control is crucial to extend filter life and maintain stable temperatures. GORE Cooling Filters start with a resistance of 50 Pascals, increasing over time.
- Filter Sealing: A gasket in the frame ensures a good seal between the enclosure and the filter.
- Design and Mounting: Mounting is typically done with brackets or frames to ensure pleats stay vertical. Follow the airflow direction on the label and ensure consistent gasket compression around the perimeter. At least 10mm clearance should be given on each side to prevent distortion.
- Contact a Gore specialist with questions about fan selection, design and filter installation.
| Ingress Protection Testing | Wind Driving Rain Testing | Flammability Testing | |
|---|---|---|---|
| Filter protection against ingress of particulates and water | Resistance to open flame | ||
| METHOD: IEC 60529 | RATING: IP653 | METHOD: GR 487-CORE Comply with the 31 m/sec [70 mph] 3 | METHOD: UL 900 |
| Salt Fog Testing | Filter Attributes |
|---|---|
| Filter resistance to salty environments | |
METHODS:
| METHOD:
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3 Enclosure test; filter supports this performance when installed in sealed enclosure with louver protecting filter
Environmental challenges: PM10 particles in the air
Global Field Testing / Theoretical Lifetime Modelling
The environmental conditions in the deployment locations of outdoor electronic enclosures are highly variable. Even highly sophisticated computer simulation or laboratory testing cannot adequately predict the long-term performance of filters used for ambient air filtration in every situation. In our global field test program, cabinets using GORE Cooling Filters were deployed to evaluate lifetime of filters in different air pollution environments with particles of different natures and origins. With this research, theoretical models were validated with empirical data collected from the field test unit in high air pollution areas.
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FOR INDUSTRIAL USE ONLY
Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.
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