Any ventilation project within the construction industry must not only comply with the latest regulations to ensure a healthy indoor environment but also protect the outdoor environment. 

All stakeholders should be aware of the requirements to deliver healthy air, from designers and architects who plan and select the ventilation products to installers who follow the plans and project managers who manage the complete process. 

An effective quality control process oversees these essential factors to deliver a high-performance project. It encompasses not only building regulation compliance and correct installation but also adherence to reducing the carbon footprint. 

Why maintaining healthy indoor air quality is important

Healthy indoor air quality ensures the comfort and well-being of the occupants, whether in a residential or commercial building. Whereas natural ventilation (i.e. opening windows) is the traditional method of ventilating, this allows pollutants to enter, while mechanical ventilation filters out these impurities.

It’s surprising how many pollutants exist in indoor air. While products such as cleaning sprays and personal care items such as hairspray or deodorant contain chemicals and emit pollutants, so does the human body. We breathe out CO2 which is a contaminant, as are allergens from our pets. The furniture, carpets and fabrics in buildings also release impurities that are invisible to the human eye. 

This poor ventilation can trigger severe allergic reactions and respiratory conditions such as asthma. This is often caused by dust mites and the growth of mould due to excess moisture levels. Quality assurance in ventilation removes these risks efficiently and promotes a healthy environment to live and work in.

Occupant comfort, in terms of the right temperature and the elimination of odours and dust is essential, not only for pleasant living but to improve concentration. This is especially important in an office environment, where feeling alert can improve productivity and output.

What happens when the quality of ventilation projects is neglected?

Bypassing quality control procedures and trying to save money is a false economy that will cost more in the long run. Quality is a vital component of a ventilation project and neglecting it can cause:

• Health risks – leading to respiratory problems such as asthma and allergies. This is due to volatile organic compounds (VOCs) that sit in the air before being inhaled and irritate the breathing.

• Sick building syndrome – with symptoms such as headaches, dizziness, fatigue and nausea. This can be the cause of absence from work, which is an additional cost for employers.

• Damp and mould – caused by moisture build-up, these issues contribute to health problems and damage the building's aesthetics.

• Condensation – when warm air meets a cool surface it condenses as water droplets, leading to condensation on windows and walls. This can also damage the building, and cause mould growth.

• Increased energy costs due to inefficiency - a poorly designed ventilation system will struggle to maintain comfortable temperatures and humidity levels. This can lead to occupants turning up the air conditioning in summer or the heating in winter, wasting energy and pushing up utility bills.

• Additional maintenance costs – with the system being more likely to not work correctly or break down. Also, resolving problems such as mould and condensation can be more expensive than preventing them in the first place.

• Environmental damage – inefficient operation of a ventilation system can cause excess CO2 and pollutants to be released into the atmosphere, damaging the ozone layer. 

Why choose EnviroVent to ensure quality in ventilation projects?

Our commitment to offering premium ventilation solutions means your final project will be of the highest quality. From mechanical ventilation systems to positive input ventilation and accessories, you can be sure you're installing a superior product that will deliver optimal performance, reduce environmental impact and create a healthy indoor atmosphere for people to live and work in

To ensure a high-quality ventilation system, the following quality assurance elements are crucial:

Project Planning and Quality Management: 

Before any equipment purchase or construction takes place there must be detailed project planning. This will ensure the successful completion of the project and avoid potentially expensive errors.

The initial phase includes a well-defined scope that outlines the purpose, capacity needs and compliance standards to adhere to. This should include detailed site assessments to address the building's needs.

The project should be designed using the latest software that considers maximum efficiency. A professional designer will understand how to make the most of the available space via a non-intrusive ventilation system that offers optimal performance. 

Teamwork, regular meetings and liaison are crucial at all stages of the project, to to ensure ongoing quality and seamless delivery. Each stakeholder should be aware of their responsibilities for quality within the framework of the project and carry them out to the highest standards. 

No matter the size of the team or project, there should be a quality control manager who is responsible for each stage of the quality assurance procedure. They must ensure inspections are carried out, tests are performed and regulations are met. 

Updates, identification of issues, quality improvement opportunities and collaborative problem-solving ensure the smooth execution of the ventilation project.

A project manager should oversee the project and progress of the different stakeholders, particularly when different external companies are involved. This includes supplying relevant documents such as building regulations, overseeing plans and installation and monitoring deadlines.

The use of project management tools such as time tracking and lean construction methods can optimise time and costs, allowing contractors to deliver faster results whilst still maintaining quality.

Good to know – streamline ventilation design

EnviroVent offers a ventilation design service tailored to your needs. Our technical specialists can take care of your ventilation design, leaving you to focus on project management, implementation and the benefits of quality assurance.

Product Quality, Compliance and Safety:

A quality ventilation system must comprise the most suitable products, comply with regulatory requirements and maintain a safe, healthy environment for the building occupants. This ensures the system delivers the stipulated minimum ventilation rates and minimises the risk of contaminant build-up or the spread of airborne pathogens.

• Choosing high-quality, industry-certified ventilation equipment allows the creation of an exceptional system. This includes components such as fans, ducting and filters – which should be selected to optimise intended airflow and reduce potential contaminants.

• A quality ventilation system complies with the relevant regulations such as ISO 9001 (Quality Management), ISO 14001 (Environmental Management) and the “Future Homes and Building Standard” to support meeting net zero carbon emissions by 2050. 

Working to these standards demonstrates developers' and constructors' commitment to health and safety and quality assurance. It also avoids the possibility of legal issues if regulations are violated. This could not only result in fines and legal action but can cause delays and have an impact on budgets and handover dates.

Good to know – Passive House certification

Several EnviroVent products have been approved by the Passive House Institute, demonstrating our focus on achieving the creation of low-energy buildings to protect the environment. 

• Selecting the right product for the project avoids long-term issues such as breakdowns or the system not working to its full potential. Whether installing a new mechanical ventilation or positive input ventilation system, stopping condensation and mould or protecting inhabitants from harmful Radon gas, choosing the most appropriate product is essential.

• Implementing quality control checks throughout the project ensures components meet specifications and installation adheres to design plans. This should include the inspection of materials, welding, ductwork integrity and equipment performance.

• Safety is another crucial factor in ventilation product quality: 

• Poor ventilation systems can lead to a buildup of pollutants, moisture, and potentially hazardous fumes. 

• Properly designed and installed ventilation systems can play a role in fire safety by removing smoke and fumes during a fire.

• Faulty appliances can release CO, a poisonous gas. A properly designed ventilation system removes CO from the building.

• Meeting quality standards also demonstrates a commitment to responsible construction for all stakeholders. This builds trust with clients which leads to a solid reputation within the industry.

Installation Expertise: 

Proper installation is part of the quality control process. Expertise in ventilation is crucial in this step of the project to guarantee the system works effectively. 

In addition, some complex systems may require specialists as each ventilation project has different requirements. Whilst a standard residential housing estate or office block may require a straightforward system, a complicated industrial building dealing with hazardous chemicals would require a specialist installation. 

• Correct installation - A ventilation system is designed to deliver a specific airflow rate and maintain a certain pressure throughout the ductwork. Incorrect installation, like leaky duct connections or incorrect sizing, can significantly impact airflow and compromise the system's ability to effectively remove contaminants and regulate temperature.

• Expert knowledge - Experienced and trained technicians understand the importance of correct installation for optimal system performance and longevity. This requires a detailed understanding of ventilation systems including how to:

• properly seal duct joints to prevent air leaks 
• maintaining clearances for balanced airflow
• prevent pressure imbalances – i.e. some zones receiving more air than others
• ensure equipment is securely mounted and levelled for safety
• configure controls correctly to prevent equipment damage – e.g. overheating and promote energy efficiency

• Problem-solving – Even the most carefully managed ventilation project can face issues, either at the installation or testing stage. A professional expert should be able to rapidly identify the problem and propose a solution, therefore saving time and money.

• Smart technology - The use of smart controls automates and optimises ventilation system operation. Installation experts need to be aware of the functionalities and potential complexities. This includes:

• How to integrate smart controls into the ventilation system.
• System adjustment based on real-time occupancy.
• Fan adaption to reduce noise and enhance comfort.
• Data analysis to optimise settings and ensure the system works correctly.
• Understanding the potential causes of errors to troubleshoot issues and maintain the system.

Today's smart controls are advanced and as well as the above functionality, can also sense and self-adjust according to the conditions. For example, a smart-controlled ventilation system can be set to increase the fresh air if the number of occupants or CO2 levels increase. 

• It is also possible to manage smart controls remotely from a smartphone or tablet – ideal if the building is unoccupied for a specific period.Testing: 

In addition to the careful planning and installation of ventilation systems, testing is a crucial component in quality assurance. This is to ensure that compliance requirements have been met, the system offers a high standard of indoor air quality for occupant safety and comfort and the building is safe.

The type of test will depend on which ventilation system is being installed e.g. mechanical extract ventilation (MEV), mechanical heat recovery ventilation (MVRH) or positive input ventilation (PIV).

• Compliance with quality standards – to adhere to government regulations and guarantee the system works to its optimum operational level.

• Building code & regulatory compliance - Testing verifies adherence to the relevant building codes and ventilation standards.

• Design validation & performance testing – To ensure that the installed ventilation system aligns with the original design specifications and performance parameters. This confirms the system fulfils its designated purpose for the specific space and predicted occupancy levels.

• Energy efficiency optimisation: Testing helps identify areas where airflow patterns can be adjusted to optimise the system functionality. This minimises energy consumption and operational costs.

• The key ventilation tests include:

• Airflow verification & distribution mapping – To check the system delivers the specified airflow rates through the designated space and also extracts the correct amount. This testing eliminates zones with stagnant air or uncomfortable drafts by measuring air velocity ( typically the number of litres of air per second input and extracted) and pressure differentials.

• Leakage detection & pressure balancing – Thorough ventilation testing identifies leaks within ductwork and imbalances in air pressure. Leaks can reduce system efficiency and potentially allow external contaminants to enter the building. Pressure balancing ensures proper air circulation patterns to maximise efficiency.

• Equipment performance evaluation – To check that fans, filters, and other components function correctly and to their optimum performance. This safeguards against malfunctioning equipment that could compromise indoor air quality or system efficiency.

Good to know – Ventilation Testing

Part F of the Building Regulations, amended in 2021, states that ventilation in new buildings must be tested. The Approved Document F requires an alternative ventilation strategy to intermittent extractor fans and natural ventilation, e.g., MEV/MVHR for buildings with an as-built air permeability rating of less than 3 m³/3 h.m² @ 50Pa (those rated as “highly airtight”).

On evidence of compliance, a Ventilation Test Certificate is issued to prove compliance and the effective performance of the system.

• Noise testing – This is just as important when considering the quality control procedure for the installed system. The unwanted hum of a background ventilation fan can cause sleep disturbance, decreased productivity and stress.

Sound level meters are used to measure noise levels in decibels (dB) at various locations. Advanced testing may involve spectral analysis to identify specific noise frequencies. This helps find the source of the noise (e.g., fan blades, duct turbulence) so it can be adjusted.

The results of inadequate testing

Testing ventilation systems is part of the overall quality assurance standards and should not be skimped on. If testing is not performed correctly it can lead to:

• Increased health risks - Poor ventilation can lead to the buildup of pollutants and moisture, potentially triggering respiratory problems and Sick Building Syndrome.

• Discomfort: Uneven airflow distribution can cause drafts, stuffiness, and temperature fluctuations.

• Financial losses: Inefficient systems incur higher energy costs and may require corrective repairs or additional maintenance due to undetected issues during installation.

The importance of environmental issues in ventilation

Quality assurance in ventilation encompasses the protection of the environment and supports the carbon emissions challenge to reach Net Zero by 2050. This policy has been established to ensure that the amount of greenhouse gas emissions released into the atmosphere balances the amount removed, i.e. decarbonisation.

Mechanical ventilation plays an important role in this objective, as its design and installation strongly affect greenhouse gases. 

• The environmental impact of ventilation systems can be extremely damaging if not considered as part of the quality control process. This includes:

• Energy consumption: An inefficient ventilation system will use excess energy. This means higher bills and more impact on the environment due to increased greenhouse gas emissions. Quality control ensures proper design, installation, and maintenance to maximise efficiency and minimise energy waste.

• Product selection: Installing effective ventilation systems means ultimately using fewer resources. If a system works as planned over a period of years it will contribute towards sustainable ventilation. 

• The rapid heating up of the planet means environmental considerations in quality control should be a first priority, not second as in the past.

• Energy efficiency - Quality control promotes the selection and installation of energy-efficient products such as variable speed fan drives, heat recovery ventilators and mechanical extraction ventilators. This ensures the system operates using minimal energy consumption.

• Life cycle monitoring - A holistic approach to quality control considers the entire life cycle of the ventilation system. This includes minimising energy consumption during operation and ensuring proper disposal of used components at the end of the system's life.

• The increasing priority to face environmental issues affects quality control in several ways:

• Stricter regulations - Growing environmental concerns have led to stricter regulations regarding building energy efficiency. Quality assurance processes must adapt to incorporate these regulations and ensure compliance.

• Focus on sustainability - The increasing demand for sustainable buildings requires all stakeholders in the ventilation installation process to implement quality control procedures that prioritise energy efficiency.

• Technology innovation - companies need to stay updated on the latest advancements in energy-efficient ventilation technologies and incorporate them into their projects. For example, smart controls can reduce energy waste either by adjusting ventilation off-site or by real-time sensing of the number of building occupants.

• The benefits of eco-conscious quality control are numerous and include:

• Reduced environmental impact - By prioritising energy efficiency, new technology and proper disposal methods, quality control contributes to a lower environmental footprint for ventilation systems.

• Improved building sustainability - Eco-conscious quality control practices contribute to a more sustainable building project overall, enhancing its overall environmental performance. This can also make a building more marketable, therefore commanding a higher sale price.

• Long-term cost savings - Energy-efficient systems minimize operational costs, making eco-conscious quality control a financially sound decision for developers.

As with any technical device, regular maintenance promotes efficiency. Whether in a residential or commercial building, a maintenance schedule is a crucial factor in optimising the ventilation system's quality control. Foreign matter can build up and cause the system to become ineffective, which will be an overall extra cost.

It is the responsibility of the installer to ensure that the building owner is aware of the recommended cleaning and maintenance requirements. Some companies offer a regular servicing package as part of the development cost – which is the ideal prompt to keep the system in prime condition. A cleaning advice system manual should be supplied as a minimum, particularly as each ventilation system will have different requirements.

• Residential Buildings - cleaning and servicing residential ventilation systems, including air filters and grilles, is recommended every 3-5 years. This is a baseline recommendation assuming normal usage and occupancy.

• Commercial buildings - Higher usage, occupancy levels, and potential for contaminants such as cooking grease or chemicals need more frequent cleaning. Annual servicing and cleaning may be necessary, especially for buildings with kitchens, healthcare facilities, educational establishments or highly pollutant environments, such as those operating with chemicals.

• To keep the system in perfect working condition the following are essential:

• Cleanliness - Over time, dust, dirt, and debris can accumulate inside filters, ducts and fan blades. Regular cleaning prevents these contaminants from restricting airflow, reducing efficiency, and compromising air quality.

• Filter changes – An essential maintenance requirement in addition to cleaning. These should be replaced according to the manufacturer's recommendations without fail. Dirty filters will prevent the system from operating correctly.

• Component care - Moving parts such as fan bearings require periodic lubrication to minimise friction, prevent wear and tear, and ensure smooth operation. This leads to quieter operation and extended equipment life. 

• Calibration and adjustments - Sensors, dampers, and control systems may require periodic calibration and adjustments to maintain optimal airflow patterns, pressure balances, and temperature control.

Whilst some basic cleaning can be performed by residents or building owners, the more technical aspects should be carried out by an expert so as not to damage the system.

• Regular maintenance as part of the quality control programme also extends the life of the ventilation system. 

• Early detection of issues - Allows for the identification of potential problems before they escalate into major breakdowns.

• Reduced repair costs - The prompt repair of minor issues prevents them from snowballing into expensive repairs or system replacements in the future.

• Conserving system efficiency - A well-maintained system operates at peak efficiency, reducing energy consumption and lowering running costs.

How often should ventilation be cleaned and serviced?

Cleaning and maintenance depend on several factors including the type and size of the building, its use and the number of occupants.

The key factors that influence cleaning and servicing/maintenance include:

• Occupancy and activity levels - Higher occupancy or activities that generate dust, smoke, or grease will require more frequent cleaning. Homes with pets or allergy sufferers may also benefit from a more regular cleaning schedule (1-2 years).

• Presence of contaminants - Environments with high levels of dust, pollen, or mould require more frequent cleaning to prevent buildup within the system. This includes seasonality, for example, during the spring/summer pollen season (annually).

• Type of ventilation system - More complex systems with detailed ductwork may require professional cleaning at longer intervals (5-7 years) compared to simpler systems with readily accessible filters (1-2 years).

As the leading ventilation manufacturer in the UK, EnviroVent offers a vast range of products to meet quality assurance standards. We are proud to have won numerous awards in the ventilation sector, giving developers and installers the peace of mind needed to deliver quality projects. 

The benefits of choosing EnviroVent include:

• 30 years of expertise in the field of ventilation 
• A free survey to assess your ventilation project needs
• Ventilation specialists located throughout the UK to help you address any issues or answer your ventilation questions
• Premium products offering longer product life and efficiency
• Products suitable for Passive House design
• A rapid and free ventilation design service using BIM-compliant Revit design software
• A professional ventilation installation team approved by Which? Trusted Traders
• A Lifetime Range® of products with 5, 7 or 10-year warranties.

Good to know – Try easyVent®

Want to know which ventilation products best suit the needs of your project? Try our easyVent® selection system. Click here to enter your project details and we'll advise a series of products tailored to your ventilation project.

Don't take our word for it. We have hundreds of satisfied customers who've worked with EnviroVent to ensure quality assurance at all stages of the project. 

Some of our case studies:

• Developer Chooses EnviroVent for his biggest project to date!
• Miller Homes Specifies PIV
• EnviroVent Ventilation Chosen for Historic Liverpool Building

For more information on successful ventilation projects led by EnviroVent's quality assurance strategy click here.

It's essential to prioritise quality control in ventilation projects. This creates a safe, healthy and comfortable environment for building occupants, maximises efficiency and contributes to the protection of the environment.

• Protecting health: A well-designed and well-maintained ventilation system removes pollutants, stale air, and excess moisture, preventing the buildup of harmful contaminants that can trigger respiratory problems and other illnesses.

• Energy efficiency: High-quality systems are designed for optimal airflow with minimal energy consumption. This results in lower operating costs and a reduced environmental footprint.

• Long-term investment: Investing in quality products, expert installation, and thorough testing ensures a ventilation system that functions flawlessly for years to come. This minimises the need for premature replacements and costly repairs.

• Regulatory compliance: Quality ventilation systems adhere to building regulations and ventilation standards, ensuring occupant safety and avoiding potential fines or legal issues.

• Optimising comfort: Quality ventilation products and installation ensure correct airflow and temperature control, and eliminate drafts, stuffiness and temperature fluctuations. This creates a pleasant and productive environment for occupants, whether residential or commercial.

Taking shortcuts has several serious implications, including:

• Health risks: Poor ventilation can trap pollutants and moisture, leading to health issues.

• Discomfort: Uneven airflow and temperature fluctuations can create an uncomfortable and unproductive environment.

• Financial losses: Inefficient systems consume more energy and may require frequent repairs due to poor-quality components or improper installation.

• Premature system failure: Low-quality products or poor installation can lead to system breakdowns, requiring expensive replacement parts and extra labour costs.

EnviroVent is the trusted partner for developers and construction companies seeking exceptional quality and expertise in mechanical ventilation systems. Contact us to find out more about how to establish your business as a leader in ventilation system quality control.