CDL now offer a wide range of added services. These have developed over the years by being flexible in our approach and listening to the wishes of our customers.

Online Tutorials & Library


Heat Gain/Loss Calculation

We are happy to look over building designs, drawings or attend site to assist in the calculation of heat gain or loss.

Pre-Commissioning Checks

We can if requested attend site to work with the contractor to ensure a healthy installation is fully ready before commissioning.


We offer free weekly training sessions on our products, please see the training section for more information.

Training & Design


Tool Box Talks

We can arrange early morning discussions with engineers to cover any queries they have.  An informal discussion over coffee!

Design and selection

Being familiar with our product means we can help and suggest with the selection of our product efficiently

Commissioning Assistance

If requested we can assist the installing contractor to commission any installation from a small mini-VRF to a bespoke controls BMS arrangement


We have a YouTube channel with a growing collection of “how to” and “what’s in the box” videos

Telephone support

We offer extended hours of telephone technical support.


We can deliver to all parts of the UK including the Highlands and Islands.  Additionally we can offer same day services should the need arise.



Health checks

We can attend site and run a health check for current or old product.  We offer an independent report to satisfy the requirements of the end user.

Site support

If we can’t help over the phone, we can arrange to attend site with the engineer to assist.

Post Sales