Indoor air quality depends on steady, controlled extraction from the rooms that create the most humidity. The Elta Trade MOXA MEV is a centralised mechanical extract ventilation unit designed to remove stale, moist air from multiple rooms using one efficient fan and a well-planned duct network. For developers, M&E contractors and housing providers, it delivers reliable airflow, low running costs and straightforward compliance with Building Regulations Part F.

How a centralised MEV system works

An MEV system places a single fan in a cupboard, loft or ceiling void. Branch ducts connect from the fan to the kitchen, bathrooms and utility spaces, extracting continuously at low speed, with a boost setting for higher moisture loads. The result is whole-home ventilation with fewer moving parts than room-by-room fans, simpler maintenance and consistent background performance.

Why choose the Elta MOXA MEV

• Continuous extract, low energy: EC motor technology keeps consumption down while maintaining design duty.
• Quiet operation: Smooth airflow paths and acoustic attention make it suitable for flats and small homes.
• Compact footprint: Fits neatly in ceiling voids or service cupboards to free valuable space.
• Installer friendly: Clear access for commissioning and filter cleaning speeds up servicing.
• Flexible control: Trickle and boost speeds with options for humidity or switch control to match occupant needs.

Planning duct routes? Pair the unit with spiral ducting and airtight fittings to minimise pressure loss and leakage.

MEV vs dMEV: which is right for your project?

Both systems remove moisture and pollutants, but the layout differs:

• dMEV: Individual continuous fans in each wet room. Best for smaller projects, simple retrofits or when independent room control is preferred.
• MEV (like MOXA): One central fan with multiple extract points. Ideal for apartments, townhouses and new-builds where quiet, balanced whole-home extract is required.

If you need single-room solutions, browse our dMEV fans. For multi-room efficiency and central maintenance, the MOXA MEV is the smart choice.

Applications and specification tips

• New-build apartments and PRS schemes: Consistent background extract with minimal visual impact.
• Refurbishments: Replace ageing intermittent fans with a single, efficient unit for better IAQ and fewer penetrations.
• Design guidance: Keep duct velocities sensible to reduce noise, use smooth radius bends where possible and allow straight lengths before and after the unit for accurate commissioning.
• Commissioning: Balance branch flows to design duty and document settings for handover.

Next steps

Ready to specify a centralised extract system? Explore the MEV category or speak to our team for help with selection, duct layouts and accessories. For projects needing single-room continuous extract, see our dMEV range.