One of the most important aspects of a well planned, low energy highly efficient heat recovery and ventilation system is the ducting type, design and the quality of installation.
Careful consideration to the design and choice of installation materials ensures your MVHR system delivers the correct ventilation rate and energy efficiency to your home. We only use precision engineered metal and plastic ducting, fitting and silencers mechanically fastened and sealed at every joint for air-tightness.
The use of rigid, large diameter ducting is industry best practice providing a smooth flow of air with the least resistance, causing less noise (from both fans and air turbulence) and costing less to run. We will install your MVHR system with smoothflow rigid ducting throughout, providing better heat efficiency, lower energy use and a quieter system. Solid ducting is also resistant to crush damage during construction and thereafter can be cleaned and maintained if required. 
A minimum of 25mm aluminium foil backed wool insulation to ducting in a cold space is essential to retain high heat efficiency and avoid condensation forming in the ductwork. 
Best practice installation is to use larger 125mm diameter branch lines and up to 250mm diameter main lines, which can carry the necessary high volumes of air at low velocity and resistance (depending on size of system).