I would like to thank you and your team for the installation of our inverter ducted system. This was a significant investment and I am pleased to say that it is making a big difference in the level of comfort and convenience it provides. The choice of supplier and installer was not taken lightly. Having determined a set of parameters for cost, system efficiency and support I sought quotes from several parties. Delta was superior on all counts but what was particularly persuasive was the fact that you have been in business for over 30 years, and provided references. After the final choice of system was made it was reassuring that the work commenced as scheduled. Your team worked very efficiently and professionally over two days. Afterwards the house and roof space were cleaned. Again, thank you for your efforts. I have no hesitation in recommending your services to others.