The Residential Lossnay MVHR Range – Aligning with Part O of the Building Regulations

The Residential Lossnay VL-CZPVU-L/R-E MVHR range is designed to deliver a continuous supply of clean, healthy air to individual homes and multi-residential developments. By extracting stale air from kitchens, bathrooms, toilets and utility rooms while simultaneously introducing fresh, filtered air into living areas and bedrooms, the system helps maintain excellent indoor air quality throughout the home.

To maximise energy efficiency, the system recovers heat from the extracted air and transfers it to the incoming fresh air, reducing heat loss while maintaining a comfortable indoor environment all year round.

The range directly supports compliance with Part O of the Building Regulations. Mitsubishi Electric has engineered the Lossnay MVHR units, particularly when paired with the CP 500CM L/R cooling module, to provide tempered fresh air, overheating mitigation, and controlled indoor conditions that align with Part O performance expectations.

KEY FEATURES

The Lossnay Cooling Module – Enhanced Protection Against Overheating

The Mitsubishi Electric CP-500CM-L/R is a compact cooling module specifically designed to integrate with the VL 500CZPVU-L/R-E and VL 520CZPVU-L/R-E Residential Lossnay MVHR systems. By delivering tempered fresh air, it helps reduce the risk of overheating and supports compliance with Part O building regulations.

Incorporating a self-contained direct expansion system, advanced inverter technology and lower-GWP R32 refrigerant, the CP-500CM-L/R provides efficient, sustainable cooling performance. Developed with Part O compliance in mind, it offers flexible activation temperatures, adjustable capacity settings and overshoot temperature control, enabling precise indoor climate management and greater confidence in maintaining compliant living environments.

Learn more about Part O of the Building Regulations in the CPD Guide

Part O of the Building Regulations was developed to address the rising risk of overheating in modern homes, which are often designed to be highly airtight and well insulated to improve energy efficiency and retain heat during colder months.

The CPD Guide provides a comprehensive overview of the requirements of Part O, including the relevant assessment methods and calculations. It also explores a range of solutions available from Mitsubishi Electric, including the Residential Lossnay with Cooling Module, designed to help manage overheating and improve occupant comfort in modern residential buildings.

Download the CPD guide today to learn more.