Delta T Energy Consulting - Santa Rosa, California

Lila B.

Delta T performs many of the HERS tests for our business, and working with them is easy. All of our clients have very positive feedback about their professionalism and punctuality, and the raters and owners have worked with me to adapt to my own communication needs -- as my time is very tight they keep to the essentials, accept my brief communication and hop on board with projects. They are efficient, get the job done, and responsive.

Indoor C. C.

"The team at Delta T is nothing short of exceptional. They are knowledgeable, dedicated professionals, who consistently go above and beyond expectations.

As an HVAC contractor, their thorough knowledge and communication has been, and continues to be a vital asset, guiding us through projects from start to finish, swiftly and efficiently.

We’ve worked with them for years on various projects both residential and commercial (HERS Testing, Permit Services, etc.) and look forward to many more years of working together."

-The Team at Indoor Climate Control, Inc.

Stanley C.

Delta T has provided Cal Green and Title 24 documents for my new home. I worked with Roy Asi, and he has been absolutely AWESOME throughout the process. I feel like he went above and beyond to help me navigate energy compliance requirements, and has been honest and extremely helpful. Top notch service all around. I look forward to continuing working with Delta T as my project progresses.

Elizabeth G.

We had a great experience working with Roy and the Delta T team! They worked with us closely on a complicated design that included a sunroom to test different design modifications and ensure our final plans were Title 24 compliant. Highly recommend and we'll definitely be using them again!

William M.

Roy at Delta T Energy has been very helpful in walking me through the Cal Green Inspection process. He has been available every time I have called to answer my questions about what is needed at inspection time. He has also followed up to make sure I was getting responses from HVAC companies that Delta T works with and recommends. With a lot of boxes to check off in the Cal Green Building process, it has been nice working with a company willing to make it a little easier.

Alana C.

I have been working with Adrian the founder for a few years and now Roy and Whitney as well. The entire team is knowledge and a joy to work with. They are highly responsive and helpful with the latest code information, as well as product recommendations and they turn reports and documentation around very quickly. I highly recommend Delta T Energy as your one stop shop energy experts!

Lisa M.

Roy came out to visit us and ensure that we passed the energy requirements on our kitchen/family remodel and addition. A great experience! He was on time, very pleasant and easy to work with. I am so appreciative of the work they do for California's codes and reducing our carbon footprint.

Matt W.

Delta T Energy just finished up with my advanced energy rebuild certification. The team is very knowledgeable and worked hard to finish this project 100% and on time. Roy guided us through this sometimes difficult process and was a pleasure to work with.