Michelle Sharp, Group Communications Manager at Zehnder Group UK, explains why MVHR (mechanical heat recovery and ventilation) systems are the right choice for New Build projects with benefits for developers and homeowners.
New homes are driven to be built to stringent energy-efficient standards and the choice of heating and ventilation system is crucial to achieve these standards and maintain a good, comfortable indoor environment.
With MVHR systems as part of the build, big savings in energy bills can be achieved. This is essential if Passivhaus Standard is required. For example, Zehnder worked on a Passive House social housing development at Knight’s Place in Exeter that resulted in a remarkable annual energy bill of just £18.00 per household.
However, even if actual PassiveHaus Standard is not required, a MVHR system is still the choice for a perfectly balanced solution for any modern, energy-efficient home, especially for New Build
Build a structure well, with practically no air leakage, and you will keep the heat in and the energy bills down. There is however the question of air – the air that the homeowners will breathe, the quality of that air and how comfortable that air makes the home throughout the year. A sealed house design will win the energy-efficiency agenda, but ventilation needs to be an integral element of its overall design. An energy-efficient modern home needs a whole house ventilation system to contribute to the delivery of good indoor air quality.
MVHR is a whole house system that provides continuous ventilation 24 hours a day 365 days a year, working to maintain and deliver fresh air. It comprises a centrally-mounted unit which is located in a cupboard, loft or ceiling void, and which is connected to each room via a ducting network, with air supplied to or extracted from rooms via simple ceiling or wall grilles. Ventilation is balanced – extract and supply – so always a consistent level of fresh air.
MVHR helps reduce the heating demand of a property by recovering heat that would have otherwise have been lost through the traditional ventilation process. There are many different units with varying performances, but this can be up to an outstanding 96%!
MVHR provides continuous year-round ventilation which prevent issues such as mould or condensation occurring. MVHR provides fresh filtered air to dwellings – good indoor air quality is essential for health and wellbeing and air is passed through replaceable filters in the unit. This is especially important with the increased density planning guidelines for homes and brownfield developments. MVHR is also an advantage where homes are situated close to industrial estates, on flight paths and near to busy roads which may have poor external air quality levels.
Heat Recovery Ventilation is detailed in Part F of the Building Regulations for airflow rates, and contributes to efficiency via Part L, in SAP calculations. The decision isn’t a difficult one on the basis of energy performance, health and comfort but does require more thought than an extractor fan! This means that design and specification is crucial and it means that it ventilation should be part of the design process
ComfoAir Q range of MVHR units provide whole house system solutions.
Zehnder Group UK Ltd
Unit 4, Watchmoor Point
For any commercial rooflight refurbishment project, there are a number of building considerations to factor in. Therefore, VELUX Commercial’s new detailed white paper explores these considerations influencing commercial building refurbishment.Posted in Articles, Building Industry News, Building Products & Structures, Glass, Innovations & New Products, Lighting, Publications, Research & Materials Testing, Restoration & Refurbishment, Retrofit & Renovation, Roofs, Windows
Construction fastening technology specialist EJOT provides an effective anchoring solution to enable a Yorkshire building contractor to use hemp-based insulation as part of the sustainable upgrade of a 200 year old cottage.Posted in Articles, Building Industry News, Building Products & Structures, Case Studies, Innovations & New Products, Insulation, Posts, Restoration & Refurbishment, Retrofit & Renovation, Sustainability & Energy Efficiency, Walls
Oakio next generation external cladding is now available in the UK. This product ticks boxes for looks, durability and sustainability with 95% of the boards made from reclaimed oak and other recycled products.Posted in Articles, Building Industry News, Building Products & Structures, Building Systems, Cladding, Innovations & New Products, Restoration & Refurbishment, Retrofit & Renovation, Sustainability & Energy Efficiency, Timber Buildings and Timber Products, Walls, Waste Management & Recycling, Wooden products
Keyline Civils Specialist is teaming up with the Lighthouse Construction Industry Charity to launch a social media campaign encouraging the civils sector to open up about mental health and wellbeing.Posted in Articles, Building Industry News, Building Products & Structures, Drainage, Drainage, Guttering, Soffits & Fascias, Fascias, Health & Safety, Information Technology, Innovations & New Products, news, Plumbing, Roofs, Walls