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Pinnacle launches ResiDUCT™ - High Performance Ducting Designed for Overheating Compliance (Part O)

2 September 2025 | Pinnacle

Pinnacle HVAC Solutions has launched a new range of metal ducting ResiDUCT™ - a slimline system that fits in a standard ceiling void and is designed to tackle the evolving demands of Part O overheating requirements. 

Key Features & Benefits:

  • Made in the UK & Independently Tested: Designed and fabricated in the UK, with airflow performance tested by BSRIA

  • Four Optimized Sizes: 300×100 mm, 300×125 mm, 400×100 mm, and 400×125 mm - each delivering high airflow performance equivalent to 180–230 mm circular ducting

  • Engineered for Part O Compliance: Developed in direct response to Approved Document O’s overheating ventilation rates, ResiDUCT™ enables higher MVHR airflow without sacrificing space in the void

  • Hybrid Ready: Where increased ventilation rates are required to meet overheating planning conditions, a cost effective ducting design is being adopted for MVHR systems where both metal and PVC are designed to work together to strike a balance between flexibility, cost and performance. 

  • Reducing Air Leakage: With focus on installed performance, unique socket-seal joints and integral stiffeners, unique to ResiDUCT™  help ensure seamless connections as parts are pushed together.  An independent air leakage test showed a 52% reduction in air leakage, 34% lower MVHR fan speeds required, and up to 40% project cost savings compared to standard ductwork



“ResiDUCT™ meets the unique needs of modern residential ventilation—high airflow, limited space, and airtight integrity—all while maintaining UK manufacturing quality,” said Michelle Sharp Head of Marketing at Pinnacle HVAC Solutions.

With increased airflow rates, often almost half again required to combat overheating, the MVHR units themselves need to provide more performance – but that is only half the story – the ducting needs to accommodate the increased flow rates too – and no-one want to have to accommodate ducting which is larger than a typical ceiling void, or double up on runs – double the cost, double the amount of insulation, double the time to install!

Find Out More:

ResiDUCT™ is engineered to deliver ventilation excellence in tight spaces. Download the technical brochure or reach out for project-specific support.

Pinnacle HVAC Solutions continues to advance the industry with engineered products that deliver both compliance and performance.

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