Environmental Design Solutions Limited (EDSL) was formed in 1989 to commercially develop Tas Software. EDSL sells Tas software and consultancy services using Tas. EDSL believe that the mixing of development, consultancy and software support leads to a focused software product, with quality support available to end users.

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Training Courses

Attending a Tas training course counts towards the CIBSE CPD programme.

The training courses are all held at our Milton Keynes office and cost £250 + VAT per person per day. The courses run from 9.30am to 4.30pm. You can book a place on any of our training courses by phone (details available on the Contact page) or by using the Email Form and choosing category 'Training'.

Before we can confirm your place on a training course, you must send us a purchase order (for the total cost of the requested courses) and a signed, completed application form. It is also a requirement to complete the pre-training work prior to the first attendance of the 3-day Tas Building Designer course - details are on the application form.

Please note that any rescheduling or cancellation by the attendee of a confirmed training course placement will still be charged at 50% if made less than 2 weeks prior to the course starting. You should inform EDSL of any changes to your attendance as soon as possible in order to avoid this late cancellation charge.


Tas Building Designer (3 days)

Part L2a 2006 and EPC (2 days)

Lumen Designer (1 day)

- Thu 18th February - Fri 19th February -
Mon 22nd March - Wed 24th March Thu 25th March - Fri 26th March Fri 5th March
Mon 19th April - Wed 21st April Thu 22nd April - Fri 23rd April -
Mon 17th May - Wed 19th May Thu 20th May - Fri 21st May -
Mon 21st June - Wed 23rd June Thu 24th June - Fri 25th June -