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Rooftop Air Handling Units London

Looking for efficient air conditioning in London? Discover the benefits of rooftop air handling units, from improved indoor air quality to energy efficiency. Find out more here!

In the bustling city of London, where space is at a premium, rooftop air handling units have become an increasingly popular solution for efficient and effective air conditioning. These units, strategically positioned on rooftops, provide a compact and flexible system for regulating indoor air quality in commercial and residential spaces. With their sleek design and advanced technology, rooftop air handling units offer a seamless integration into the urban skyline, while delivering optimal indoor comfort and energy efficiency. Whether it’s a high-rise office building, a hotel, or a residential complex, these units are revolutionizing the way Londoners experience ventilation and air conditioning.

Benefits of Rooftop Air Handling Units

Improved indoor air quality

Installing rooftop air handling units can significantly improve indoor air quality in buildings. These units are equipped with high-quality air filters that effectively capture dust, pollen, allergens, and other airborne contaminants, ensuring that the circulated air is clean and healthy. By removing these pollutants, rooftop air handling units can help reduce the risk of respiratory problems and allergies among building occupants.


One of the major advantages of rooftop air handling units is that they save valuable indoor space. As the units are installed on the roof, they don’t occupy any floor space within the building. This is particularly beneficial for commercial and industrial buildings where space is often limited. The freed-up space can be utilized for other purposes, increasing the overall functionality and efficiency of the building.


Rooftop air handling units are designed to be highly energy-efficient. They are equipped with advanced features such as variable speed drives, which adjust the airflow based on the demand, resulting in lower energy consumption. Additionally, these units can integrate with energy management systems, allowing for better control and optimization of energy usage. The energy efficiency of rooftop air handling units not only reduces operational costs but also contributes to environmental sustainability.

Reduced noise pollution

Another advantage of rooftop air handling units is their ability to minimize noise pollution within buildings. Since these units are located on the roof, they are away from occupied spaces, reducing the noise level experienced by building occupants. This is particularly important in environments that require quiet and peaceful surroundings, such as hospitals, hotels, and offices. By reducing noise pollution, rooftop air handling units contribute to a more comfortable and productive indoor environment.

Easy maintenance

Rooftop air handling units are designed for easy maintenance, making it convenient for building owners and facility managers to keep them in optimal working condition. Regular maintenance tasks such as filter replacement, cleaning, and inspections can be performed without disrupting the building’s operations. Additionally, rooftop installation allows for easy access to the units, simplifying repair and service procedures. Easy maintenance ensures that the units operate efficiently and prolongs their lifespan, resulting in cost savings in the long run.

Types of Rooftop Air Handling Units

Packaged Rooftop Units (RTUs)

Packaged rooftop units, also known as RTUs, are one of the most commonly used types of rooftop air handling units. They consist of all the necessary components, including the cooling and heating elements, filters, fans, and controls, in a single enclosure. RTUs are suitable for both commercial and residential applications and are commonly found in office buildings, schools, and retail establishments.

Cooling-Only Rooftop Units

As the name suggests, cooling-only rooftop units are designed solely for providing cooling to the building. These units are ideal for regions with hot climates where cooling needs outweigh heating requirements. Cooling-only rooftop units are commonly used in shopping malls, restaurants, and other facilities where cooling demand is high throughout the year.

Heat Pump Rooftop Units

Heat pump rooftop units are versatile units that can provide both cooling and heating to a building. These units utilize a refrigeration cycle to extract heat from the ambient air and transfer it indoors during winter, and vice versa during summer. Heat pump rooftop units are often used in residential buildings, hotels, and commercial spaces that require year-round climate control.

Gas/Electric Rooftop Units

Gas/electric rooftop units are a combination of both gas and electric heating systems. They offer the flexibility to switch between gas and electric heating depending on the availability and cost of fuel. Gas/electric rooftop units are commonly used in buildings where natural gas is readily available and offer better heating efficiency compared to electric-only units.

Modular Rooftop Units

Modular rooftop units are designed to provide flexibility and scalability in air handling capacity. These units consist of multiple modules, each containing a fan, filter, and coil. The modular design allows for easy expansion or downsizing of the air handling capacity based on the building’s needs. Modular rooftop units are commonly used in large commercial buildings, data centers, and industrial facilities.

Factors to Consider when Choosing a Rooftop Air Handling Unit

Size and capacity

The size and capacity of a rooftop air handling unit are crucial factors to consider when selecting the appropriate unit for a building. The unit should be sized appropriately to meet the heating, cooling, and ventilation requirements of the space. Consulting with HVAC professionals can help determine the correct unit size and capacity based on factors such as building size, occupancy, and climate conditions.

Energy efficiency

Energy efficiency is an important consideration to ensure cost-effectiveness and sustainability. Look for rooftop air handling units with high energy efficiency ratings, such as those certified by ENERGY STAR®. Units with features such as variable speed drives, advanced controls, and energy recovery systems can significantly reduce energy consumption and operating costs over the lifespan of the unit.

Installation requirements

Consider the installation requirements of the rooftop air handling unit in terms of space availability, access, and structural support. Ensure that the building’s roof is capable of supporting the weight of the unit and that there is sufficient space for installation, maintenance, and service access. It may be necessary to consult with structural engineers or architects to evaluate the rooftop’s suitability for the unit.

Availability of maintenance services

Before the installation, consider the availability of maintenance services for the chosen rooftop air handling unit. Ensure that reputable service providers are available in the area to perform routine maintenance tasks, repairs, and emergency services when needed. Regular maintenance is essential to ensure the longevity and optimal performance of the unit.


Budget is always a key consideration when investing in rooftop air handling units. Determine the allocated budget for the unit and consider the long-term cost implications, including installation costs, energy usage, and maintenance expenses. While it can be tempting to opt for cheaper options, it is important to balance cost with quality and performance to ensure satisfactory results in the long run.

Installation Process of Rooftop Air Handling Units

Site inspection and assessment

Before installing a rooftop air handling unit, a thorough site inspection and assessment should be conducted. This involves evaluating the suitability of the building’s roof for installation, assessing the available space and access, and identifying any potential obstacles or challenges. A comprehensive understanding of the site conditions is crucial for a successful installation.

Unit selection and sizing

Based on the site assessment and the building’s requirements, select the appropriate rooftop air handling unit in terms of size, capacity, and features. Proper sizing is essential to ensure optimal performance and efficiency. Work closely with HVAC professionals to choose the right unit that meets the specific needs of the building.

Ductwork and electrical connections

Install the necessary ductwork and electrical connections to connect the rooftop air handling unit to the building’s HVAC system. This may involve running ducts, installing dampers, and connecting wiring to ensure proper airflow, distribution, and control of the conditioned air throughout the building.

Rigging and lifting

Rigging and lifting equipment are required to safely transport and position the rooftop air handling unit onto the roof. This process should be carried out by experienced professionals following all safety guidelines and regulations. Care should be taken to protect the roof and surrounding areas during the lifting and installation process.

Testing and commissioning

Once the unit is installed, it should be thoroughly tested and commissioned to ensure proper functioning. This involves checking the airflow, temperature control, electrical connections, and overall performance of the unit. Any adjustments or fine-tuning should be made to ensure optimal operation. Proper testing and commissioning are vital to ensure that the rooftop air handling unit performs efficiently and meets the desired comfort requirements.

Common Applications of Rooftop Air Handling Units

Commercial buildings

Rooftop air handling units are widely used in commercial buildings such as offices, shopping centers, and restaurants. They provide efficient heating, cooling, and ventilation for large spaces that accommodate diverse occupant needs. The space-saving design of rooftop units is particularly beneficial in commercial buildings where maximizing usable floor space is essential.

Industrial facilities

Industrial facilities often have unique requirements for air conditioning, ventilation, and air filtration. Rooftop air handling units are commonly used in industries such as manufacturing, warehouses, and distribution centers to provide the necessary comfort and air quality for workers while also contributing to process efficiency and safety.

Hospitals and healthcare facilities

Hospitals and healthcare facilities require precise temperature and humidity control to maintain a comfortable and sterile environment. Rooftop air handling units are often used in these settings to ensure efficient air distribution and filtration, as well as compliance with strict regulatory standards for infection control and patient safety.

Hotels and resorts

Hotels and resorts rely on rooftop air handling units to provide consistent and comfortable indoor environments for guests. These units can efficiently cool and heat guest rooms, common areas, and other facilities, ensuring a pleasant experience for visitors. The noise reduction features of rooftop air handling units are particularly important in hospitality settings where a quiet and relaxing atmosphere is desired.

Retail stores

Retail stores, including supermarkets and shopping malls, require effective heating, cooling, and ventilation systems to create a comfortable shopping environment for customers. Rooftop air handling units are often chosen for their ability to provide efficient and uniform climate control throughout the store, ensuring customer comfort and enhancing the shopping experience.

Maintenance and Servicing of Rooftop Air Handling Units

Regular filter replacement

Regular filter replacement is essential to maintain the efficiency and performance of rooftop air handling units. Filters should be inspected and cleaned or replaced according to the manufacturer’s recommendations. This ensures that the unit continues to provide clean and healthy air, minimizing the risk of indoor air quality issues and system malfunctions.

Cleaning and sanitization

Periodic cleaning and sanitization of the rooftop air handling unit components are necessary to remove accumulated dirt, debris, and microbial contaminants. This includes cleaning the coils, fans, ductwork, and other parts of the unit. Proper cleaning helps maintain optimal airflow, prevents the growth of mold and bacteria, and extends the lifespan of the unit.

Inspection of belts and pulleys

Belts and pulleys are critical components of rooftop air handling units that require regular inspection. Over time, belts can become loose or worn out, and pulleys may become misaligned. Regular inspections allow for early detection of any issues, ensuring that the belts and pulleys are in good condition and functioning properly. Any necessary adjustments or replacements should be made promptly.

Thermostat calibration

Calibrating the thermostat of rooftop air handling units is important for accurate temperature control and energy efficiency. The thermostat should be checked and calibrated regularly to ensure that it reflects the actual temperature accurately. This prevents overcooling or overheating, optimizing the unit’s operations and reducing energy waste.

Condenser coil cleaning

Condenser coils are crucial for heat exchange in rooftop air handling units. They can accumulate dirt, debris, and other contaminants over time, reducing their efficiency and impeding heat transfer. Regular cleaning of the condenser coils helps maintain their optimal performance and energy efficiency. This can be done using specialized coil cleaning solutions or by hiring professional HVAC technicians.

Considerations for Rooftop Air Handling Units in London

Weather conditions

London’s variable weather conditions, including temperature fluctuations and high humidity, should be considered when selecting rooftop air handling units. The units should be capable of providing efficient cooling during hot summers and effective heating during cold winters. Additionally, units with humidity control features can help maintain optimal indoor comfort levels.

Noise regulations

London has specific noise regulations that must be adhered to when installing rooftop air handling units. These regulations dictate the acceptable noise levels to prevent disturbance to nearby residences or businesses. It is essential to choose rooftop units with low noise ratings and to ensure that the installation complies with local noise ordinances.

Space limitations

Space limitations can be a challenge when installing rooftop air handling units in London, especially in densely populated areas where buildings are closely spaced. It is important to select units with compact designs that can fit within limited rooftop spaces while still providing sufficient capacity and functionality.

Ventilation requirements

London’s building regulations and codes specify minimum ventilation requirements to ensure a healthy indoor environment. Rooftop air handling units should be capable of meeting these ventilation requirements by providing adequate fresh air intake and ensuring proper air distribution throughout the building.

Accessibility for maintenance

Consider the ease of access for maintenance and service when selecting rooftop air handling units in London. Rooftop units should be installed in a manner that allows easy and safe access for routine maintenance, inspections, and repairs. This includes considering the location of the unit in relation to other rooftop structures or obstructions.

Integration of Rooftop Air Handling Units with Building Management Systems

Remote monitoring and control

Rooftop air handling units can be integrated with building management systems (BMS) to enable remote monitoring and control. This allows facility managers to monitor the performance of the units, adjust settings, and receive alerts or notifications regarding any issues or malfunctions. Remote access simplifies management and ensures timely response to maintenance needs.

Energy optimization

Integration with building management systems enables energy optimization strategies for rooftop air handling units. With real-time data on occupancy, weather conditions, and energy usage, the BMS can adjust the operation of the air handling units to optimize energy consumption. This may include adjusting fan speeds, optimizing temperature setpoints, and implementing demand-based control strategies.

Fault detection and diagnostics

Integration with building management systems can facilitate fault detection and diagnostics for rooftop air handling units. The BMS can monitor and analyze the performance of various components, providing alerts or notifications when abnormalities or faults are detected. This allows for proactive maintenance and troubleshooting, minimizing downtime and improving the overall reliability of the units.

Data analysis and reporting

Building management systems can collect and analyze data from rooftop air handling units, providing valuable insights into their performance and energy usage. Data analysis allows facility managers to identify trends, patterns, and potential areas for improvement. Regular reports can be generated to assess energy efficiency, operational costs, and system performance, aiding in informed decision-making.

Integration with other HVAC systems

Rooftop air handling units can be seamlessly integrated with other HVAC systems within a building through the building management system. This allows for coordinated and synchronized operation of different HVAC components, such as chillers, boilers, and ventilation systems. Integration ensures optimal performance, energy efficiency, and comfort throughout the building.

Upgrading and Retrofitting Rooftop Air Handling Units

Evaluation of existing units

Before upgrading or retrofitting rooftop air handling units, it is essential to evaluate the performance and condition of the existing units. This includes assessing their energy efficiency, capacity, and compatibility with the building’s needs. An evaluation can determine if upgrading or retrofitting is necessary or if replacement with newer units is a more viable option.

Energy efficiency improvements

Upgrading rooftop air handling units presents an opportunity to improve energy efficiency. Newer units often incorporate advanced technologies such as variable speed drives, energy recovery systems, and improved controls, resulting in reduced energy consumption. Energy efficiency improvements can lead to significant cost savings in energy bills and contribute to environmental sustainability.

Integration of smart technologies

Retrofitting rooftop air handling units with smart technologies can enhance their functionality and performance. This may include adding sensors for occupancy detection, air quality monitoring, or remote access control. Smart technologies enable more precise control, better energy management, and improved occupant comfort.

Upgraded filtration systems

Upgrading the filtration systems of rooftop air handling units can improve indoor air quality and occupant health. High-efficiency filters, such as HEPA filters or activated carbon filters, can effectively remove allergens, pollutants, and airborne contaminants. Upgraded filtration systems are particularly valuable in buildings where occupants may have sensitivities or respiratory conditions.

Compliance with regulatory standards

Retrofitting rooftop air handling units offers an opportunity to ensure compliance with updated regulatory standards and codes. As building and environmental regulations evolve, older units may no longer meet the requirements. Upgrading or retrofitting the units ensures that they comply with current regulations, providing peace of mind and avoiding potential penalties.

Finding Reliable Suppliers of Rooftop Air Handling Units in London

Research and reviews

Conduct thorough research to identify and evaluate reputable suppliers of rooftop air handling units in London. Look for companies with a track record of quality products and services. Read customer reviews and testimonials to gain insights into the supplier’s reliability, customer satisfaction, and after-sales support.

Certifications and accreditations

Ensure that the suppliers of rooftop air handling units in London hold relevant certifications and accreditations. Look for certifications such as ISO 9001 for quality management systems and ISO 14001 for environmental management systems. These certifications demonstrate the supplier’s commitment to quality, environmental responsibility, and adherence to industry standards.

Customization options

Consider suppliers that offer customization options for rooftop air handling units. Each building has unique requirements, and the ability to customize the units ensures that they are tailored to meet specific needs. Suppliers that offer customization options can work closely with customers to design and manufacture units that fit their exact specifications.

After-sales support

Reliable suppliers should provide excellent after-sales support and service for rooftop air handling units. This includes warranty coverage, technical support, and prompt response to maintenance and repair needs. Ensure that the supplier has a dedicated service team and readily available spare parts to minimize downtime and ensure the longevity of the units.

Price competitiveness

While price should not be the sole determining factor, compare the prices offered by different suppliers to ensure competitiveness. Consider the overall value offered, including product quality, features, and after-sales support, when evaluating the pricing. It is important to strike the right balance between affordability and quality to make an informed purchasing decision.

In conclusion, rooftop air handling units provide numerous benefits such as improved indoor air quality, space-saving, energy efficiency, reduced noise pollution, and easy maintenance. Choosing the right type of unit, considering factors like size, energy efficiency, installation requirements, maintenance availability, and budget, is crucial for optimal performance. The installation process involves site inspection, unit selection and sizing, ductwork and electrical connections, rigging and lifting, and testing and commissioning. Rooftop air handling units have applications in commercial buildings, industrial facilities, hospitals, hotels, resorts, and retail stores. Regular maintenance and servicing, along with considerations for specific locations like London, integration with building management systems, upgrading and retrofitting, and finding reliable suppliers contribute to maximizing the benefits of rooftop air handling units.

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