Air Conditioning Services
Modern cooling and heating systems engineered to perform year-round.
As fully qualified installers and Refcom certified air-conditioning specialists, we design and install high-efficiency systems from leading manufacturers including Mitsubishi, Daikin, Samsung and Hitachi.
Commercial Applications
From shops, bars, restaurants, offices and hotels to larger public buildings, our air conditioning solutions are energy-efficient and create optimal environments for staff and customers alike. We supply new installations, maintenance contracts and rapid breakdown support for sites throughout Essex and London.
Domestic Installations
Air conditioning is increasingly popular in homes. We provide discreet, low-maintenance systems for specific rooms or full-house solutions, designed to maximise comfort and efficiency.
Servicing & Maintenance
Regular servicing ensures that your air-conditioning keeps running efficiently, safely and with minimal downtime. We support servicing and maintenance contracts across commercial and domestic properties.
Refrigerant Upgrades
We carry out upgrades from older R22 systems to modern refrigerants such as R410A and R32—improving environmental performance and meeting regulation.


Heating, Boilers & Gas Engineering
Complete heating and gas services from installation to certification and repair.
Boiler Installation & Upgrades
Our Gas Safe registered engineers handle modern condensing boiler installations from leading manufacturers, helping clients improve efficiency and compliance.
Domestic Gas Services
For homeowners, landlords and letting agents we undertake appliance repairs, upgrades and full servicing—for boilers, cookers and open-flued equipment.
Commercial Gas Engineering & Plant-Rooms
Large-scale projects such as hospitals, care homes and industrial sites are handled end-to-end—from low-pressure supply runs to plant-room installation.
Heating System Design & Maintenance
Alongside boilers we deliver central-heating installations, performance diagnostics, maintenance and repairs—ensuring systems are efficient and reliable.
Plumbing, Drainage & Ancillary Mechanical Services
We combine plumbing, mechanical engineering and building services to ensure end-to-end delivery for both domestic and commercial clients.
Domestic Plumbing & Refurbishment
We work with home-owners, landlords and letting agents to install new bathrooms, hot-water systems, boilers and heating systems — and carry out all related building work to keep project delivery efficient.
Commercial Plumbing Services
Working with major clients such as hotels, embassies, retail chains and property management companies, we provide full plumbing installations, staff/visitor washrooms, drainage repairs and emergency support.
Drainage & External Services
We cover internal and external drainage repairs and installations, integrating plumbing and mechanical works to keep systems working reliably for the long term.

Get in Touch
For expert advice, tailored solutions and a professional service you can rely on, contact us today:
Tel: 01277 823648 · Mob: 07711 886428
Email: info@sjbmechanical.com








