While the design and installation of the system is a key part of any ventilation project, so is regular maintenance and aftercare. Although when a project is handed over aftercare becomes the customer's responsibility, collaboration between the builder or developer and the customer is essential for a healthy, safe indoor environment. 

Preventing problems from occurring due to maintenance shortcuts should be the common objective of all stakeholders involved in a building’s ventilation system, from conception to delivery. 

Ventilation system aftercare applies to all buildings, whether residential, commercial or industrial. Poor ventilation maintenance not only leads to a reduction in system efficiency but could put the health of the building occupants at risk, inadequate maintenance can also lead to premature failure of a ventilation system..

We've put together information on ventilation product maintenance to offer guidance on how builders and technical directors can optimise the system’s performance and longevity. 

This includes advising customers on the importance of regular maintenance, implementing effective cleaning procedures, and addressing common issues promptly to avoid costly repairs.

Ensuring quality ventilation product maintenance offers occupants healthier, more comfortable and more sustainable spaces. Improper or a lack of maintenance can result in contaminated air circulation., product failure or damage to the building fabric. 

The benefits of ventilation system aftercare include:

Health

Reduced exposure to pollutants - ventilation helps to dilute and remove indoor pollutants, such as volatile organic compounds (VOCs), allergens, bacteria and mould. Even the CO₂ humans breathe out can be a pollutant.

Preventing respiratory issues - ventilation can alleviate symptoms of asthma, allergies and other breathing problems.

Preventing sick building syndrome - properly functioning ventilation helps prevent this illness. Not only does this make people feel unwell, but in a commercial environment it can result in employees taking days off sick, which is costly to the company.

Good to know

Sick Building Syndrome* is officially recognised by the UK Health and Safety Executive.  It is not a direct illness but occurs when building occupants suffer from symptoms caused by the building, such as poor ventilation maintenance. The symptoms worsen during the working day and improve on leaving the building. 

• These can include:
• Headaches
• Tiredness
• Wheezing, coughing, sneezing
• Itching and rashes
• Dry skin
• Dizziness and feeling sick

Things can be even more serious in an industrial environment. Inhaling hazardous chemicals can be fatal, which is a key reason for regular ventilation product maintenance.

Cost savings

Improved energy efficiency - ventilation system aftercare can help regulate temperature and humidity levels, reducing the strain on heating and cooling systems.

Lower maintenance costs - ventilation helps prevent mould and condensation, which can damage building materials and lead to expensive repairs.

Environmental impact

Energy-efficient ventilation systems can help lower greenhouse gas emissions, which is crucial for buildings to meet the Net Zero emissions targets across the UK. 

Improved indoor air quality - ventilation contributes to a healthier indoor environment by reducing the need for chemical cleaners and air fresheners.

Every ventilation system consists of several components that must be checked and cared for to keep them in optimal working order. The customer needs to understand which components they can maintain and which require works to  be undertaken by experienced, competent and authorised persons..

While expert installation teams are familiar with the full ventilation product range and each item’s lifespan, other stakeholders should understand ventilation system aftercare.

Whether mechanical extract ventilation (MEV), mechanical heat recovery ventilation (MVHR) or positive input ventilation (PIV), each system has its own maintenance requirements.  Adequate ventilation product maintenance ensures the system performs efficiently and the health of the occupants is protected.

Filters are the main concern relating to generalised maintenance of the ventilation system. These come in different grades that require inspection and changes at different periods. Predictive maintenance i.e. replacing a filter as it is coming to the end of its life will avoid any unnecessary downtime for the ventilation system.

Who should understand the functioning of these components?

Anyone involved in the lifecycle of a ventilation system, from design to installation, should have a solid understanding of its components and how it works. This includes:

• Designers and architects – producing plans that allow for ease of access for inspections and ventilation system aftercare
• Construction managers - to specify the correct products, ensure proper installation and troubleshoot issues.
• Project managers – whose role is to liaise with all stakeholders in the project, including the building control inspector. 
• Engineers and installers - who design and oversee the implementation of ventilation systems.
• Maintenance technicians - essential for effective problem analysis, repairs and maintenance.
• Building owners - a basic understanding helps when communicating with maintenance teams and making informed decisions about system upgrades or replacements.

Regular ventilation system aftercare is vital to keep things running smoothly and efficiently. This results in lower energy bills and a healthy environment for the occupants of the building. 

However, long-term maintenance should be taken into account at the ventilation system design stage. Components must be easily accessible for cleaning or replacement at a later stage.

The key benefits of regular ventilation system aftercare include:

• Energy efficiency - allowing the system to operate at its optimum performance and reduce energy consumption and costs
• Product lifespan - the system is less likely to break down and more likely to last longer than if it were not maintained.
• Health - improved air quality can reduce respiratory illnesses such as asthma.
• Occupant comfort - a consistently pleasant temperature makes living and working in the building easier.
• Regulation compliance - regular maintenance can ensure the system continually meets the requirements of government standards, for example, Approved Document F of the UK Building Regulations.
• Reduction in environmental impact - contributing to sustainability targets, such as the UK's Net Zero strategy.
• Reduces fire hazards - through checking electrical issues and debris build-up.

Professional or DIY ventilation cleaning? 

On handover, customers should be advised of the best cleaning procedure for the ventilation system. 

It is possible to clean some parts of modern ventilation systems without a professional, such as ducts and air filters, however, this only performs a 'surface clean'.

For a real deep clean a professional ventilation cleaning company with specialist equipment should be used. They will also be familiar with different ventilation systems and the best way to access them.  

The potential consequences of neglecting maintenance 

After a project handover it's easy to neglect the building's ventilation system. Customers should be encouraged to follow regular ventilation product maintenance to prevent problems.

A lack of ventilation product maintenance can cause:

• Deteriorating indoor air quality - the build-up of contaminants can pose health risks to occupants.
• Increased energy consumption - inefficient systems use more energy, leading to higher utility bills.
• Mould and mildew growth - moisture build up due to poor ventilation can prompt the growth of microorganisms that are harmful to health. 
• Lethargy - leading to tiredness and potential illness.
• System breakdowns - lack of maintenance can result in costly repairs or premature system failure.
• Fire hazards - accumulated dust and debris in ductwork can create a fire risk.

In addition, a breakdown in a ventilation system can severely affect the health of the occupants/visitors in a building and have other consequences that regular maintenance can prevent.

CO₂ inhalation due to poorly maintained ventilation systems

Of particular note is the inhalation of carbon dioxide (CO₂) if ventilation system cleaning is overlooked. Carbon dioxide is a naturally occurring gas, but excessive levels indoors can pose health risks.

When the system is not maintained properly, the exchange doesn´t work correctly and can lead to:   

• Reduced airflow - clogged filtersand blocked ductwork can restrict airflow, preventing the removal of CO₂.
• Fan breakdowns - faulty fans can reduce the system's ability to circulate air effectively.
• Duct leakage - leaky ducts can bypass the ventilation system, allowing CO₂ to accumulate.

The above can cause difficulties in concentration, headaches, fatigue and Sick Building Syndrome.

Implementing a comprehensive maintenance schedule is crucial for preserving the health and efficiency of the ventilation system. 

The warranty terms and conditions and any maintenance requirements should always be checked as this can also differ depending upon the ventilation system.

The key elements that should be included in a ventilation system aftercare plan include:

• Regular inspections - visual inspections should be carried out regularly to identify any issues or signs of wear.

• Filter replacement - air filters should be replaced according to manufacturer recommendations or as needed based on air quality conditions.

• Cleaning - regular cleaning of the system components is essential to remove contaminants.

• Equipment calibration - adjustment of the system components ensures accurate performance and energy efficiency.

• Record keeping - maintenance records help track system performance and identify trends. This is just as important for residential properties as for commercial premises.

By establishing and following a well-structured maintenance schedule, building owners and managers can significantly improve indoor air quality, reduce operating costs, and extend the lifespan of their ventilation systems.

This section outlines the cleaning, inspection, and safety protocols for different ventilation components that can be performed without the services of a professional. House builders and developers can advise customers on these as part of the handover, ensuring their contribution towards the health and safety of the occupants.

It is important to take into account any manufacturer's guidelines on cleaning, maintenance and frequency that may be supplied with specific ventilation products.

Step-by-step cleaning and inspection

A regular cleaning and inspection routine is vital for maintaining a healthy ventilation system. 

Anyone performing ventilation system aftercare should always ensure the system is switched off before carrying out any maintenance or cleaning.

Visual inspection - examine the visible parts of the system for signs of damage, such as cracks, corrosion or exposed wiring. Check for dust accumulation, mould growth or condensation (which may be apparent in other areas of the building). Pay close attention to ductwork, vents, and equipment housing.

Component checks for wear, damage or debris.

Specific ventilation product maintenance tips

Here are the essential maintenance tips for ventilation systems:

Ducts

• Access - access panels should be easy to remove for cleaning. This is an important part of the ventilation design system.
• Cleaning - use specialised duct cleaning equipment or hire a professional to remove dust, debris and pollutants.
• Sealing - close any gaps or leaks in ductwork to prevent air loss and improve efficiency.

Filters

• Inspection - regularly check filters for dirt and debris buildup.
• Replacement - according to the manufacturer's recommendations or when visibly dirty.

Recommended cleaning products and tools for ventilation system aftercare

It is not recommended to use harsh cleaning products to clean a ventilation system as many of these contain strong chemicals. 

These chemicals can be harmful to health, even in small doses. They can also damage the ventilation system as they can be corrosive. It is much better to use natural cleaning products, however, it is important to be aware that even some branded as 'natural' can contain harmful ingredients such as ammonia.

The best equipment for basic DIY cleaning of a ventilation system includes:

• Mild detergent - for general cleaning of the components.
• Distilled white vinegar - effective for dirt and mould and is much gentler than commercial cleaning products. It can also be mixed with sodium bicarbonate to create a cleaning paste.
• Soft cloths and brushes - to wipe surfaces.
• Vacuum cleaner - for removing dust and debris from ducts and components.

Safety precautions during ventilation product maintenance 

Cleaning a ventilation system can be dangerous – specific safety rules must be followed to stay safe. Not only could you put yourself at risk if you don´t follow the correct procedures, but you could damage the ventilation system, which could result in expensive repairs.

Depending on the level of cleaning or maintenance being carried out, the following points should be followed:

• Personal protection equipment - wear appropriate PPE, including gloves, masks, and safety goggles, to protect from dust, debris, and potential contaminants.
• Electrical safety - always turn off the power to the ventilation system before performing any maintenance.
• Working at height - if working at height, use appropriate safety equipment, such as ladders or an aerial work platform.

When considering which products to use for a ventilation system it is essential to consider quality. Premium products will last longer and offer better performance than cheap alternatives. 

Selecting products from a company with an excellent reputation in the ventilation market can ensure functionality and low system maintenance, making it cost-effective long-term.

The durability of a ventilation system is crucial for maintaining indoor air quality and energy efficiency. Several factors influence the system's lifespan and maintenance can significantly extend it.

These include:

• Material quality - the type of materials used in the construction of ventilation components and systems directly impacts their life and resistance to wear and tear. High-quality products generally last longer.

Good to know

EnviroVent has been supplying quality ventilation system products to the building industry for over 35 years. Many of our ventilation products have won awards and we continue to work on the development of ventilation systems for residential use. 

• Installation quality - proper installation ensures optimal performance and a long lifespan. Incorrect installation can lead to premature wear and tear.
• Maintenance - regular inspection, cleaning and maintenance are essential for preventing issues and extending product life.
• Operating conditions - environmental factors such as humidity, temperature, and air quality can affect the lifespan of ventilation products.
• Usage - frequent use can accelerate wear and tear, reducing product the life of the product.

Preventive measures to prolong product life

A typical ventilation system is made up of many components that need careful handling and protection, from production, delivery and storage through to installation. 

Implementing preventive measures at all stages of a ventilation system's lifespan can significantly enhance its performance. The following primarily apply to contractors and installers, but also building managers.

• Regular maintenance - plan and stick to a regular ventilation product maintenance schedule, including cleaning, inspection, and filter replacement.
• Protect from extreme conditions - keep ventilation products away from extreme temperatures, humidity, and direct sunlight.
• Professional installation - ensure that ventilation products are installed by qualified professionals to avoid installation-related issues.

Tips for handling and storing ventilation products

Appropriate handling and storage are imperative to upkeep ventilation product maintenance. This is a valid reason to select and purchase ventilation products from a professional company that has packaged and stored them correctly to avoid damage. 

The following tips for contractors may seem obvious, but can sometimes be overlooked: 

• Packaging - keep ventilation products in their original packaging until ready for use to protect them from damage.
• Storage - keep ventilation products in a cool, dry place, away from direct sunlight and moisture.
• Stacking - avoid putting heavy items on top of ventilation products.
• Cleaning before installation - to prevent dust and debris buildup, especially if the products have been stored for some time.
• Protection - use protective covers or padding when storing ventilation products to prevent damage.

Good to know

Whilst storage may be necessary in some circumstances, reducing the time between delivery and installation will make a project more cost-effective. This is a form of lean construction that should be incorporated into the planning stages of the project. 

It is the responsibility of the materials buyer to ensure the ventilation installation process is streamlined to minimise costs. This requires clear communication with the manufacturer and installers to ensure the process runs smoothly, with no delays.

Despite diligent ventilation system aftercare, these units can sometimes experience issues and need aftercare. Advising customers on these points can help enforce the builder’s reputation as a company that offers more than just a completed building. This can lead to potential higher demand for their properties and services.

Common problems include:

• Reduced airflow - often caused by clogged filters, blocked vents, or a malfunctioning fan motor.
• Noise - excessive noise can stem from unbalanced fan blades, worn bearings, or vibrations in the ductwork.
• Unpleasant smells - these can originate from mould growth, stagnant air or issues with the exhaust system. Even rodents in the ductwork can cause odours.
• Inefficient heating systems- problems with the ventilation system can impact the performance of the heating system.

Troubleshooting steps for different issues

Sometimes, a quick check of the ventilation system can identify a problem that can be fixed easily. Before calling a professional it is advisable to see if there are any issues with the:

• Filters - it may be time for a replacement.
• Vents - these could be blocked.
• Ductwork - this may be damaged and leaking.
• Fan motor - debris may prevent the fan from working correctly.*
• Electrical connection - there may be a loose wire in the system (if this is the case a qualified electrician must repair it).*

*These should be checked by a competent, qualified person.

When to contact a professional for ventilation product maintenance

If the problem cannot be resolved or has been identified and can’t be fixed, a ventilation technician should be called.

This is essential for bigger problems as the customer trying to fix it themselves could not only damage the components but may invalidate the system's warranty.

The importance of proper waste disposal/recycling

When replacing components or disposing of old ventilation equipment, the contractor must follow proper waste disposal and recycling guidelines.

• Hazardous materials - some ventilation components may contain hazardous materials, such as refrigerants or electronic components. These must be disposed of according to local regulations.
• Recycling - many ventilation components, including metal and plastic parts, can be recycled. 
• Landfill disposal - items that cannot be recycled must be disposed of by following local landfill regulations that are relevant to builders.

Good to know

Building waste must be disposed of in compliance with local regulations. If not it can become an environmental hazard by polluting the soil, and waterways and emitting harmful greenhouse gas emissions.

The correct management and reduction of building waste, whether for installing a ventilation system or constructing a large complex can benefit from the principles of lean construction. 

Many stakeholders in the construction process play a role in ensuring the long-term performance and efficiency of ventilation systems. Their involvement extends beyond the construction phase and into the operational life of the building.

• System selection - choosing the right ventilation system for a building is crucial. Builders and developers should consider factors like building size, occupancy, climate and energy efficiency when selecting the system. 
• Installation quality - proper installation will deliver optimal performance and longevity. Working with qualified engineers and installers and adhering to manufacturer guidelines are paramount.
• Documentation - detailed documentation of the ventilation system, including installation plans, manuals and maintenance schedules, should be provided in the handover.

Incorporating maintenance into construction plans and schedules

Proactive planning for ventilation maintenance can significantly impact how a building operates. The points below are useful tips for contractors, building managers and project managers. Not only will these actions be useful to the recipient, but they also reinforce your reputation as a professional who is committed to after-sales service.

• Maintenance schedules - developers should create preliminary maintenance schedules based on the chosen ventilation system, local climate conditions, purpose and intended occupancy of the building.
• Access points - designers and architects should ensure easy access to ventilation components for routine maintenance and cleaning. This may include provisions for inspection hatches or removable panels in construction plans for larger buildings.
• Component quality - using high-quality materials for ventilation components can extend their lifespan and reduce maintenance requirements.

Providing clear maintenance instructions and timing recommendations at the handover ensures the building owner understands the complexity of ventilation and the importance of maintaining the system.

This should include user manuals that explain the ventilation system's operation, maintenance procedures and troubleshooting tips. Diagrams and images are often easier and faster to understand than complicated written instructions.

• Maintenance reminders - provide clear guidelines on filter replacement schedules and other routine maintenance tasks.
• Emergency contacts - include contact information for qualified maintenance professionals in case of issues. This should include an out-of-hours number to call.

Proper ventilation product maintenance is essential for ensuring optimal indoor air quality, energy efficiency, and the overall well-being of building occupants.

Homes need to be comfortable to live in and shops and offices must be at a pleasant temperature. The ventilation can affect a person’s overall productivity, whether they're working from home, performing household chores or working in a factory or office.

Consequently, adequate ventilation product maintenance is necessary to keep the system running at its maximum efficiency. 

By implementing best practices for ventilation product aftercare, you're contributing to the creation of sustainable and healthy buildings, at whatever stage of the chain you are involved in.

The combination of developers’ expert knowledge combined with diligent maintenance procedures creates spaces where people live comfortably and the impact on the environment is reduced.

For additional guidance and resources, take a look at EnviroVent's selection of comprehensive maintenance manuals: