Several years ago, we had our first HERS test performed by Elem3nts - and no surprise, our 40 year…read moreold ducts were leaking badly. Fast forward to the present, the HVAC company we selected for a new heat pump and ducts uses Elem3nts to do the required HERS testing AND handle applying for the homeowner's rebates from Silicon Valley Clean Energy and TECH Clean (very convenient). The entire process was smooth - quick and painless. The Elem3nts team was on time, professional, and left the house just as it was after they were finished. They're very experienced and knowledgeable about HERS testing. Communication around scheduling was excellent, and one rebate has already been received and the other is on its way. Elem3nts has been great!

This was such a positive investment and experience. Professionalism from the start of the process…read morethrough finish. Alfredo and his assistant came to my home in Willow Glen and performed a full evaluation of where the energy loss was coming from and what options I had to mitigate it. His report was thorough and I liked that he prioritized what I need to do right away and what can wait. Alfredo had a call with me to go over the results of the various tests that were run and made sure I understood every detail. Very happy I engaged them and I am looking forward to having warmer winters and lower energy bills

Having our old 1930 house insulated has far and away been the best investment we've made in our…read morehouse. We've lived in the house for over 40 years and were used to sweaters and sweats in the winter and during our hot days spending more time in the cooler downstairs. We now leave the thermostat set at 64 for a low and 74 for a high and the heater rarely goes on. Today (9/9/2026) we think the AC might actually go on later today. Yesterday the house never even reached 74. We had building efficiency do the insulation almost 2 years ago and have gotten so used to our house being in a comfortable range all the time we rarely even think about it. This latest heatwave has reminded us of how glad we are that we did it and that we should give them a plug again! The process itself is fairly disruptive but doesn't take too long and Building Efficiency was very profesional and helpful in minimizing the disruption. Our only regret is that we didn't do it long ago.

Building Efficiency evaluated the property and educated us thoroughly before providing a…read morecompetitive to install a heat pump and water heater. They communicated well, kept a clean work site, and the staff was professional and efficient. We've been very happy with the results.

We highly recommend Innovative Energy Solutions HERS Testing. They were referred to us as the best…read morein the industry. From the start, we experienced and felt valued as a customer. We were impressed with Bryan's outstanding professionalism and excellent skills. We immediately noticed his sincere interest, dedication and integrity with regards to resolving any concerns that we had. He was also punctual and very neat and clean. So, it is with sincere pleasure that we would like to acknowledge and commend Bryan for providing us with the very best service. His work is impeccable and exemplary. Katie, at the office, also kept us informed every step of the way. She has impeccable business etiquette, listening skills and professional decorum. We continue to be very grateful to both Bryan and Katie for their time and assistance. You can rest assured that they are a refreshing asset to their industry.

Bryan and Katie are an great team. I needed duct testing for the HERS test. I went with them bc…read morethey include a smoke test in the fee if the duct test fails so you know where the leaks are coming from. Most other companies charge an add'l fee. Bryan was awesome - punctual, fast, efficient and professional. I'd 100% go with them again.

Brandon spent 30min of his time explaining the details of the HERS testing, what is in the scope…read moreand not in scope. Also he took time to listen to my problem (concern about condensation and moisture) in the HVAC in a brand new home. Based on that he gave me concrete advice to 1/ get the HERS data from the builder 2/ work with an HVAC contractor to inspect select areas (joints, metals, drainage). I had earlier made up my mind on doing the HERS testing, so really appreciated Brandon's time and advice to focus on the right areas. Thank you, Brandon!

Brandon was helpful and considerate with his time explaining HERS testing to me, a prospective…read morecustomer. He is very knowledgeable and eager to share his knowledge when asked. Brandon is a solid professional and a good choice for a HERS rater.

Vinny is fast, reliable, and very knowledgeable. I hired him…read moreto do a HERS test and to check the duct leakage. Very happy with the service received and would gladly recommend him. He showed up on time and was respectful of my property and health concerns.

Vincenzo is very professional and knowledgeable. Very easy communicate through messages. He…read morepatiently walked me through the process and treated my place carefully.

I needed a HERS test for SJ permits. Revolution Energy was easy to schedule, fair price and great…read morework. Highly recommend!

Louis was so kind to schedule my duct pressure test on Saturday since I work 2 jobs. He arrived on…read moretime and was so professional. He inspected my system then said he didn't think his test would find anything but I wanted him to do it just for peace of mind because the result would help me know next steps toward solving my issues. He confirmed that my duct pressure was excellent then recommended that all of the duct openings be sealed with duct tape, a proper drain be installed under my home for the condensation that was just leaking onto the plastic liner under my manufactured home creating a stagnant pond under my home and I was smelling it because it was leaking into the open gaps around each of my vents. I have contacted an HVAC company who can complete the work for me. I would most certainly recommend Louis to my friends and family in a heart beat.

So unusually knowledgable, so impressive, so happy to have found Eco Performance Builders…read more The great experience started with instantly talking to someone who could answer questions (usually the person answering the phone isn't so well equipped, or so I have found). Followed by an in house visit by brainy Kyle who can answer lots of questions on the spot. For me that means when I pull the trigger on the heat pump I'm considering, Eco Performance will be my go to.

I can't recommend these guys enough. Huge thanks to…read moreAlberto's team for doing a very thorough job.

It was really great working with Mickey. We found them through the BayREN directory. Mickey was…read morereally helpful, very professional, and trustworthy over the phone, and was very honest about what service we needed. Kim was their team member who came and did the inspection for us. She was very thorough. It was a crazy day when she came because the kids were home, but she was really good with them and answered their questions as well. She was here for about two hours and really did a thorough job. She was very knowledgeable and answered all the questions I had, especially since I do not know this type of work. She was able to explain it in a way that made sense to us, and she did a great job. We are looking forward to the report that we are going to get from them.

Mickey is a trustworthy, expert resource for home energy audits who is happy to follow up to make…read moresure you are satisfied

Justin came to our house and executed a HERS pressure test professionally. We passed this time (was…read morethe second test for our project). What made this outstanding service for us was that Justin applied remedies to what otherwise would have been our ducts just barely missing a passing grade. Justin was polite and answered our many questions. We highly recommend Justin and CalRATERs.

Our HVAC contractor set us up with Calraters to inspect our newly installed system. We worked with…read moreAbdul who was great throughout the process. He was friendly, prompt, and helped to explain what he was checking during the inspection. Would highly recommend.

I hired Perry Farnum of Farnum Inspection Service for a home inspection of my older home in San…read moreJose, and I was very pleased with his work. Perry was very thorough and took his time inspecting the house. His report was detailed, well organized, and included clear explanations and photos of the issues he found. I especially appreciated that he identified and prioritized safety issues and areas that need further evaluation rather than simply pointing out cosmetic problems. The report gave me a much better understanding of the condition of my home and helped me determine which repairs I should address first. Perry was also helpful in answering my questions after the inspection and recommending that I get a termite/WDO inspection where appropriate. I would definitely recommend Perry to anyone looking for a knowledgeable, thorough, and professional home inspector in the San Jose area.

As a new first time home owner with a lot of questions, I couldn't have asked for a better…read moreinspection service! Perry was fantastically thorough, careful, knowledgeable, and generous with his time and expertise. He arrived at the agreed time, and did an initial walk-through of the property with us, noting and explaining issues and encouraging questions along the way. After that he did another methodical pass with a ladder and in the crawlspace, taking more notes and pictures. At the end he sat down with us to talk through new findings from the later pass and answered any other questions we had. And the detailed and well documented written report arrived just when he said it would the next day. I had high hopes for the service after glowing reviews from multiple friends, and they were still exceeded. It's great peace of mind knowing the state of the property in such detail!