Improve airflow beneath suspended timber floors with Elta MORI WMF100 weatherproof, mains-powered subfloor ventilation fans.
Choose a Supply Fan to push fresh air into the subfloor void, an Extract Fan to pull stale air out, or a complete two-fan bundle for coordinated airflow.
Elta MORI WMF100 Supply + Extract
Complete two-fan subfloor ventilation package
Browse our Elta MORI WMF100 range, including dedicated Supply and Extract models and the complete two-fan ventilation bundle.
Complete two-fan package combining one Supply Fan to introduce fresh air and one Extract Fan to remove stale air from the subfloor void.
Low-energy mains-powered supply fan designed to push fresh external air into the subfloor void and encourage airflow.
Low-energy mains-powered extract fan designed to remove stale or humid air from beneath suspended timber floors.
Prices are based on the supplied PAM Ties product list. Please confirm current VAT status, prices and availability on the individual product pages.
Suspended timber floors normally rely on air bricks and other ventilation openings to allow air to circulate beneath the property.
However, natural airflow may be inadequate where ventilation openings are obstructed, poorly positioned or unable to provide effective cross-ventilation.
The Elta MORI WMF100 range provides mechanical ventilation to help move air through the subfloor void.
A Supply Fan introduces external air into the void, while an Extract Fan removes existing air and discharges it outdoors.
Used together in a correctly designed arrangement, the two fans can encourage continuous airflow through suitable underfloor spaces.
Each Elta MORI WMF100 model performs a different role. The correct choice depends on the subfloor layout and ventilation requirements.
Introduces external air into the subfloor void, helping move replacement air through suitable existing openings. Requires adequate outlet routes.
Draws air out of the subfloor void and discharges it outdoors, encouraging replacement air through suitable inlet openings.
Combines one Supply Fan with one Extract Fan. Suitable for consideration where a coordinated airflow path is needed beneath the floor.
The Elta MORI WMF100 fans are designed for applications where a weatherproof, externally mounted, continuously running ventilation fan is required.
Their low-energy motors and adjustable ventilation settings provide flexibility for different building configurations.
The dedicated Supply and Extract models allow installers to select the intended airflow direction.
Both can be used in independently designed systems, while the complete bundle brings together complementary models for coordinated operation.
Elta's current MORI WMF supply and extract ranges incorporate low-energy motor technology with adjustable operating settings.
| Specification | Supply Fan | Extract Fan |
|---|---|---|
| Ventilation Direction | Pushes AIR IN | Pulls AIR OUT |
| Power Source | Mains powered | Mains powered |
| Installation | Weatherproof external mounting | Weatherproof external mounting |
| Low-Speed Operation | Adjustable trickle ventilation | Adjustable trickle ventilation |
| Boost Operation | Optional external switch | Optional external switch |
| Maximum Airflow at Boost | 17 litres/second | 17 litres/second |
| Typical Trickle Airflow | 12 litres/second | 12 litres/second |
| Trickle Power | 5 watts | 5 watts |
| Boost Power | 7 watts | 7 watts |
| Manufacturer Warranty | 5 years, subject to terms | 5 years, subject to terms |
Technical information is based on published Elta MORI WMF dedicated Supply and Extract product documentation. Confirm the supplied model and current specifications before installation.
Compare our individual Supply and Extract fans with the complete two-fan package.
Effective mechanical subfloor ventilation depends on more than installing one or two fans. The airflow route through the building should be assessed.
Check air bricks, sleeper walls and the general condition of the underfloor void. Identify any leaks, standing water or existing timber damage.
Choose positions that encourage air movement across the intended space. Avoid arrangements where fresh air immediately exits without reaching poorly ventilated areas.
Install the fan or fans in accordance with manufacturer instructions. Arrange safe mains electrical connections and confirm correct airflow direction.
Poor subfloor ventilation can contribute to persistent high humidity, stagnant air and condensation beneath suspended timber floors.
Improving air exchange may help reduce excessive moisture conditions that encourage fungal growth and timber deterioration.
Mechanical subfloor ventilation can also form part of certain radon management strategies where appropriate.
However, radon mitigation requires careful consideration of airflow direction and pressure differences. Specialist design and before-and-after testing are important.
Mechanical ventilation does not replace repairs to leaking pipes, defective drainage, standing water or structural damp problems.
Answers to common questions about the Supply, Extract and two-fan ventilation bundle.
The Supply Fan pushes fresh external air INTO the subfloor void. The Extract Fan pulls existing air OUT and discharges it outdoors.
The bundle contains one dedicated WMF100 Supply Fan and one dedicated WMF100 Extract Fan, providing both complementary ventilation functions.
The dedicated Elta MORI WMF fans are designed for continuous trickle ventilation, with adjustable settings and optional boost operation.
In this product range, individual Supply and Extract Fans are £235.00 each. The two-fan bundle is priced at £466.00.
Based on the listed prices, buying the two individual fans would cost £470.00. The bundle costs £466.00, a saving of £4.00.
Yes, where inadequate ventilation contributes to high humidity, improving airflow can help manage moisture. Underlying leaks or water ingress must also be addressed.
Improved ventilation can help reduce conditions associated with timber deterioration. It will not reverse existing rot or eliminate unrelated moisture sources.
The dedicated MORI WMF Supply and Extract models are designed for appropriate weather-exposed external installations, subject to manufacturer requirements.
Existing air bricks may still provide important inlet or outlet routes. They should not be blocked without a properly designed alternative ventilation arrangement.
Mechanical subfloor ventilation can be used within some radon mitigation strategies, but the correct approach depends on building conditions. Specialist assessment and testing are required to confirm effectiveness.
Yes. Both the dedicated Supply and Extract models are mains-powered fans. Electrical installation must comply with the manufacturer's requirements and applicable regulations.
A single fan may be appropriate where suitable passive ventilation routes exist. The bundle provides both active supply and extraction and may suit more demanding layouts when properly designed.
Subfloor ventilation is one part of managing moisture in a property. Browse related PAM Ties solutions.
Shop Elta MORI WMF100 Supply and Extract Fans or choose our complete two-fan bundle for a coordinated subfloor ventilation solution.
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