Mechanical Building Services & Commercial Air Conditioning
CHJ Mechanical Ltd provides commercial air conditioning and mechanical building services to clients across Derby, Nottingham, Leicester and the wider UK. Our Engineers handle every aspect of your project, from initial design and installation through to commissioning and long-term maintenance.
We partner with main contractors, fit-out specialists, retail developers and business owners to deliver quality installations that meet technical specifications, comply with building regulations and stay on schedule.
Commercial Air Conditioning Services
Our core specialism is commercial air conditioning. We design and install energy-efficient cooling systems that create comfortable working environments while keeping running costs under control.
VRF & VRV Systems
Variable refrigerant flow systems provide efficient climate control for multi-room commercial buildings. We design and install VRF and VRV solutions from leading manufacturers including Daikin, Mitsubishi Electric and Toshiba, delivering precise zone control and significantly reduced energy consumption compared to traditional systems.
Ideal for offices, hotels, healthcare facilities and mixed-use buildings where different areas require individual temperature control. Our Engineers handle full system design, equipment supply, installation, commissioning and integration with building management systems.
Split System Air Conditioning
Split systems offer effective cooling for individual rooms or smaller commercial spaces without the need for extensive ductwork. We supply and install wall-mounted units, floor-standing consoles and ceiling cassettes to suit your interior design requirements and building constraints.
Perfect for meeting rooms, server rooms, small offices, retail units and individual zones within larger buildings. We'll recommend the most appropriate configuration based on your cooling load, aesthetic preferences and budget.
Ducted Air Conditioning
For larger open-plan offices and commercial spaces, ducted systems deliver discreet cooling through ceiling voids with minimal visual impact. Our Engineers handle complete design, supply, installation and commissioning of ducted air conditioning systems, including ductwork fabrication, grille positioning and control integration.
We work closely with Architects and Interior Designers to ensure grille locations complement ceiling layouts and lighting schemes. All ductwork is fabricated to specification and installed in accordance with manufacturer guidelines and building regulations.
Air Conditioning Maintenance
Regular servicing keeps your cooling systems running efficiently, prevents costly breakdowns and maintains manufacturer warranties. We offer flexible maintenance contracts including filter cleaning and replacement, refrigerant level checks, system cleaning, condensate drain clearance, electrical connection inspection and full performance testing.
Maintenance frequencies can be tailored to your equipment type, usage patterns and operational requirements. We provide detailed service reports and advance notice of any components approaching end of life.
Ventilation Systems
Proper ventilation maintains indoor air quality, removes moisture and odours, and achieves compliance with building regulations. We design and install mechanical ventilation systems for commercial kitchens, industrial units, office buildings, retail spaces and residential developments.
Our ventilation services include extract ventilation systems, supply and extract ventilation, mechanical ventilation with heat recovery (MVHR), commercial kitchen extract and canopy systems, toilet and bathroom ventilation, industrial extract systems, and complete ductwork fabrication and installation.
We calculate ventilation rates based on building usage, occupancy levels and regulatory requirements, meaning systems deliver adequate air changes whilst minimising energy consumption. All installations include commissioning and performance testing with detailed handover documentation.
Heating Services
We provide commercial heating solutions designed to reduce fuel costs and environmental impact. Our Engineers work with the latest condensing boiler technology, heat pump systems and intelligent controls to deliver efficient warmth while keeping running costs low.
Our heating services include commercial boiler installation and replacement, heating system design and heat loss calculations, radiator supply and installation, underfloor heating systems for offices and retail spaces, air source and ground source heat pump installations, heating controls and building management system integration, and boiler servicing and maintenance contracts.
Whether you're replacing an aging boiler, designing heating for a new build, or upgrading to a more efficient system, we'll recommend solutions that match your budget, building characteristics and operational requirements. All installations comply with current building regulations and manufacturer specifications.
Plumbing Services
Our plumbing team handles all aspects of commercial plumbing from new installations to emergency repairs. We work on projects ranging from small office fitouts to large industrial facilities, delivering reliable systems that meet building regulations and perform trouble-free for years.
Plumbing services include hot and cold water systems, sanitary ware supply and installation, drainage systems and waste pipework, commercial bathroom and washroom installations, plant room installations and pipework, emergency plumbing repairs and leak detection, in addition to water system maintenance and compliance testing.
We coordinate with other trades to make sure pipework routes don't conflict with electrical, HVAC or structural elements. All installations are pressure-tested, flushed and commissioned to guarantee leak-free operation.
Plant & Machinery Installation
We install mechanical plant and equipment for industrial and commercial applications, managing every stage from initial planning through to final commissioning. Our Engineers work closely with your project team to achieve seamless integration with existing systems and building infrastructure.
Experience includes boiler plant installations, pump stations and pressurisation units, air handling units, chiller installations, heat exchangers, and commercial water treatment systems.
We handle all associated pipework, electrical connections, control wiring and commissioning, providing comprehensive handover documentation and operational training for your maintenance team.
