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HVAC – Heating Ventilation & Air Conditioning
‘HVAC’ refers to Heating Ventilation and Air Conditioning, which can be used in buildings to:
- Maintain internal air quality.
- Regulate internal temperatures.
- Regulate internal humidity.
It is sometimes extended to include other services, such as refrigeration (HVACR).
Internal air quality can be maintained by a combination of introducing ‘fresh’ air into the building, extracting ‘stale air’ and by filtration. Ventilation may be natural, mechanical, or mixed mode (a hybrid system).
Internal temperatures can be regulated by heating and cooling. Typically, this is achieved by heated water and chilled water that is generated by boilers and chillers and then used in heating coils and cooling coils as part of the ventilation system. Alternatively, hot water may be used to supply systems such as radiators, underfloor heating and so on.
Very broadly, HVAC systems can be centralised in a building, or local to the space they are serving, or a combination of both. They may also be connected to a wider district heating or cooling network.
They may be integrated, with heating, ventilation and air conditioning provided by a single system, for example, air handling units connected to ductwork, or they may be a combination of separate systems, for example mechanical ventilation with radiators for heating and local comfort cooling units.
Regular inspection and maintenance is necessary to ensure that systems are operating optimally.
Heating & chilled water system balancing
A properly balanced heating and chilled water system is a crucial and cost-efficient way of maintaining adequate pressure throughout your HVAC system, regardless of environmental factors or spikes in usage.
We offer a range of services for all water systems including validation, commissioning and water treatment. Our customer base include hotels, hospitals, government buildings, office blocks, schools & colleges and residential properties.
An unbalanced system can cause various issues depending on the scale of the problem and the size of the building. Some areas may be getting too much heat whilst other parts of the building could be too cold for your staff to work comfortably. A balanced system helps ensure a steady temperature throughout the building and can dramatically reduce the amount of energy wasted.
We can assist in identifying overflows which cause pump sets to work more than they are required. Identifying issues such as these and resolving them quickly and efficiently will also reduce your energy costs.
At ICS, we offer a full range of validation services for new or existing air and water systems.
Post installation, a thorough, professional validation on a newly installed system by our inhouse experienced team can ensure that it is working well and to the design specification.
Our validation service follows a step-by-step plan to check all aspects of the system. This starts with a visual inspection and also includes physical testing of flow rates, pressures, equipment condition, functionality and more.
We also sample closed water systems for microbiological and chemistry levels, and domestic water systems for drinking water quality, Microbiology and legionella.
We produce detailed reports based on the data that we have collated allowing us to identify parts of the system that are not running as efficiently as they should. A well-balanced system will help reduce on-going costs but also increase the lifecycle of your system.
If I am not storing hot or cold water in my system, do I need to carry out a risk assessment?
Yes. There may be other factors within your system that increase the risks of legionellosis, eg deadlegs, showerheads and/or long runs of pipe work containing warm water. A risk assessment should also consider anyone who could be potentially exposed to any legionella bacteria in your system, and particularly groups that are at a higher risk of contracting legionellosis. However, once you have completed your risk assessment you may decide that the risks are insignificant. If you do, you need take no further action other than to review the assessment regularly in case anything changes in your system.find out more