Since our inception, we have continued to build our business on our approach to the customer. Our team of fully-qualified engineers provide quality and value engineering from design to commissioning. We have fitted numerous air conditioning units for businesses and facilities, in Bolton, Manchester, Lancashire, Birmingham, Leeds, London and other parts of the UK.
As a company we take provide in providing a a very reliable and competitively-priced service, whether you require office air conditioning maintenance or industrial ventilation installation.
Our air conditioning, heating and air ventilation systems are located in offices, supermarkets, hotels, restaurants and industrial premises, such as factories – not just in Lancashire, where our office is located, but across the UK.
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We provide a comprehensive service and maintenance package following all our installations in order to ensure that our customers get the best out of their investment. Our engineers are fully qualified, have years of experience to ensure every job is completed to the highest of industry standards.
We also provide service and maintenance packages on existing mechanical and air conditioning systems for those customers looking for a new supplier. Whether you require air conditioning maintenance in Bolton, HVAC services in Manchester or ventilation installation services in London, we can supply.
Frequently asked questions
Commercial systems are larger, more complex, and designed to cool bigger spaces with multiple zones, while residential systems serve smaller, single-zone areas.
Typically, 10–15 years, depending on usage, maintenance, and system type.
Building size, layout, energy efficiency requirements, cooling load, budget, and future expansion needs.
Installation can take anywhere from a few days to a few weeks depending on system size, ductwork, and building complexity.
Not always—ductwork is inspected first. If it’s leaky, undersized, or damaged, replacement or sealing is recommended.
Options include rooftop units (RTUs), VRF/VRV systems, split systems, and chillers. The best choice depends on your building’s size, use, and efficiency needs.
Most contractors work to minimise downtime by scheduling work during off-hours or in phases.
At least twice a year (spring and fall), but some high-use facilities may need quarterly service.
- Uneven cooling or hot spots
- Strange noises or odors
- Rising energy bills
- Frequent cycling or system downtime
- Poor airflow
It’s best to repair issues promptly to prevent costly breakdowns and extend system life.
Preventive maintenance can include:
- Filter changes
- Coil cleaning
- Checking refrigerant levels
- Inspecting belts, motors, and electrical connections
- Calibrating thermostats and controls
Coverage
SDH provide commercial plumbing and heating services, air conditioning, ventilation and HVAC services to clients across the UK including: Birmingham, Blackburn , Blackpool, Bolton, Bradford, Cheshire, Chester, Cumbria, Lancashire, Lancaster, Leeds, Liverpool, London, Manchester, Merseyside, Midlands, Norwich, Preston, Wales, Wakefield, Warrington, Wigan and Yorkshire. Contact SDH for more information.