Each new ventilation, heating, air conditioning or plumbing system begins with an efficient design. At Callisia, we provide a full design and build service, covering the complete process, from the first technical drawings to final installation and beyond. This gives you the convenience of working with a single contractor throughout. We have a wide range of design expertise in-house on top of our practical engineering experience, and each system is custom created to meet your precise operational requirements.

We are also happy to work with pre-existing technical drawings, and can create designs based on your notes and technical specifications.

End-To-End Service

Callisia specialise in all aspects of office design, installation and building services. Design through to contract completion is carried out in-house, with care given to the layout of your existing building and the needs of your organisation. We are happy to design or reconfigure sections or whole buildings in order to accommodate the solution you need.

Computer-Aided Design

We use the latest computer aided design (CAD) technologies to provide an efficient design service and exceed our customers’ expectations in design quality and speed of delivery. Our computerised design systems send and receive drawings online, and quickly enact revisions – significantly cutting the time needed on the design phase.

In House Expertise

Each project design is produced in-house to the highest specifications, by design engineers with decades of combined experience and training. We provide customers with a choice of recognised manufacturers to ensure reliability and lower your lifetime maintenance costs, while giving you full control over your budget and timescale.

Carefully Selected Third Parties

Depending on the size and scope of the project, we have the option to partner with other design specialists, in order to provide a fast and professional solution. All third parties are closely managed by our own project managers, and adhere to the same standards of quality, training, professionalism, and health and safety as our own employees.


Many issues with mechanical systems can be resolved by careful attention to detail at the design stage. The same is true for sustainability, which includes your carbon footprint, as well as the long-term cost of ownership (including repairs and maintenance), and your operating costs. All our designs are engineered around the idea of sustainability, providing the most cost-effective solution to your project requirements, without stinting on quality, safety, or productivity.

Copyright © 2020 Callisia Ltd. All Rights Reserved. Designed and Developed by JDR Group