Retrofitting an MVHR (Mechanical Ventilation with Heat Recovery) System in your Home

Retrofitting an MVHR (Mechanical Ventilation with Heat Recovery) system in your home can be a wise investment, offering numerous benefits such as improved indoor air quality, energy efficiency, and cost savings. In this article, we will guide you through the process of retrofitting an MVHR system in your existing home.

Assess Your Home

Before retrofitting an MVHR system, it is crucial to assess your home's specific needs and suitability. Consider factors such as the size of your home, its layout, the number of occupants, current ventilation systems, and any existing insulation or airtightness measures. Conducting an energy audit or getting a professional assessment can help determine the most suitable MVHR system for your home.

Choose the Right MVHR System

There are various MVHR systems available, each with different features and capabilities. Selecting the right system for your home is essential to ensure optimal performance. Factors to consider include the system's heat recovery efficiency, airflow rates, noise levels, control options, and maintenance requirements. Consult with HVAC professionals or MVHR system suppliers to find the system that best meets your specific needs.

Consider system placement

Determine the most appropriate location for the MVHR unit in your home. This will typically be in the loft, attic, basement, or even a dedicated plant room, where the unit can be installed inconspicuously while providing easy access for maintenance. Ensure the space allows for the necessary ductwork layout and air distribution to effectively reach all the rooms in your home.

Assess Ductwork Requirements

Retrofitting an MVHR system requires the installation of ductwork throughout the house. Evaluate the feasibility of running the required ducts, taking into account existing structures, wall cavities, and the overall layout of your home. Depending on the design of your house, ductwork may be installed within ceilings, floors, or walls. If significant modifications are needed, consult with professionals to ensure a well-designed ductwork system.

Plan for Insulation and Airtightness

Retrofitting an MVHR system offers an excellent opportunity to improve insulation and airtightness in your home. Ensure that your home is properly insulated, with particular attention to areas where ductwork will be installed. This will prevent heat loss or gain during ventilation, maximizing the effectiveness of the MVHR system and reducing energy consumption. Consider consulting with insulation experts to identify areas that need improvement.

Obtain Planning and Building Regulations Approval

Depending on your location and the extent of the retrofit, you may need to obtain planning permission or ensure compliance with building regulations. Check with your local authority to determine the requirements and obtain any necessary approvals before initiating the retrofitting process. Non-compliance could lead to penalties or complications down the line.

Engage Professionals

Retrofitting an MVHR system is a complex task that requires professional expertise. Engaging qualified HVAC engineers or specialist MVHR installers is essential to ensure proper installation, adherence to regulations, and optimal performance. Research reputable professionals in your area, check their qualifications and certifications, and request quotes and references to find the most suitable team for your retrofitting project.

Installation Process

Once you have selected an installer, the retrofitting process can begin. The installation typically involves several steps, including fitting the MVHR unit, laying ductwork, installing air supply and extract vents in each room, wiring the system, and connecting it to a power supply. The installation team will ensure that all components are properly sealed, insulated, and balanced for efficient operation.

Commissioning and Balancing

After installation, the MVHR system needs to be commissioned and balanced to ensure optimal performance. This involves adjusting airflow rates, balancing airflows in each room, and fine-tuning the system to meet the specific needs of your home. Professional installers will use specialized equipment and techniques to carry out this crucial step, ensuring the system operates efficiently and quietly.

User Education and Maintenance

Once the retrofit is complete, it is important to familiarize yourself with the operation and maintenance of the MVHR system. Your installer should provide you with user manuals, guidance on system controls, and advice on basic maintenance tasks. Regular maintenance, such as filter cleaning or replacement, is essential to maintain system efficiency and prolong its lifespan.

Retrofitting an MVHR system in your home offers multiple benefits, including improved indoor air quality and energy efficiency. By carefully considering your home's specific needs, choosing the right system, engaging professionals, and ensuring proper installation and maintenance, you can enjoy the advantages of an MVHR system for years to come. Remember to consult with experts, obtain necessary approvals, and prioritize insulation and airtightness to maximize the effectiveness of your retrofit.