Thermal, Fire, Acoustic, Ventilation.


Mechanical Ventilation Heat Recovery

 On one hand we want the highest possible comfort and on the other we want the lowest possible consumption in energy.


As a consequent of striving to make our buildings more energy efficient by improving the level of insulation and building air-tight structures, our properties have become less well ventilated, but all buildings require a source of fresh air. While opening a window does provide ventilation, the building’s heat will be lost. The Mechanical ventilation heat recovery (MVHR) technology offers an optimal solution: fresh air while saving energy.

 Pawling’s MVHR specialised service will manage your project from enquiry and initial design right through to commissioning and handover. Pawling’s own dedicated team of fully trained and approved installers will provide the highest level of customer service and will ensure the correct ventilation solution is installed to meet the unique requirements of your project.


  • In-house design service
  • In-house installation service by approved installers
  • Eco Friendly – Designed to save energy
  • Highly efficient heat recovery
  • Low electricity consumption
  • Recycle’s otherwise wasted heat
  • Choice of Optional Control Units
  • Easily maintained
The system provides quiet, uninterrupted extract ventilation from the dwelling, removing warm stale air via all of the “wet” rooms, (Red duct work) creating a permanent air path through the property from the dry habitable rooms. Fresh air is drawn into the property by the fan, is routed through an integral high efficiency synthetic heat exchanger where warmth from the extracted air is transferred to the incoming fresh air, before it is supplied to the “habitable” rooms. (Blue & Red striped duct work)

A mechanical ventilation heat recovery (MVHR) systems efficiency plays a major role in optimising energy saving capabilities, it provides fresh air and improved climate control, while also saving energy by reducing heating costs, unlike conventional extractor fans which suck out and waste expensively produced heat, MVHR systems can recover over 90% of exhausted heat. 

Product Compliance

SAP Appendix Q

The Appendix Q procedures apply specifically to MVHR and MEV systems. SAP is the Government’s Standard Assessment Procedure for calculating the energy performance of dwellings. It is used to demonstrate compliance with building regulations within the following areas – Part L (England and Wales), Section 6 (Scotland) and Part F (Northern Ireland), and provides energy ratings for dwellings that can be compared nationally. For more details click on the link below: 


Energy-efficient systems that add to your comfort contact Pawling’s Insulation & Supplies Ltd for more information. 

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