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    Energy Core Construction

    4.7 (53 reviews)
    Closed 9:00 am - 4:00 pm

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    Services - Energy Core Construction

    Window installation

    Window replacement

    HVAC installation or replacement

    5 More Services

    HVAC system repair

    HVAC system maintenance

    New roof installation

    Roof replacement

    Reroofing

    Energy Core Construction Photos

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    Recommended Reviews - Energy Core Construction

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    Reviews With Photos

    I used Energy Core Construction to paint my house. They did a fantastic job. The staff was very responsive and accommodating. The work was thorough and completed on time. I'm very happy with the results.

    Everything from the initial consultation to the completed work exceeded our expectations! Very professional, punctual, and polite! We had them complete our text coat paint job and new windows and 10/10 I recommend! My husband is a painter and he was blown away by the job well done!

    Stephanie G.

    High quality and efficient workmanship. The crew leader introduced himself. He put me at ease by letting me know they are here to make me happy by replacing the windows. He was right. In about 6 hours, all was done. They cleaned up, took care of business and left. I woke up today in a NEW HOME. Photos of one of the windows being installed

    John J.

    Energy Core replaced most of our windows in September with high quality Anlin windows. We felt the price was a good value for the final product and features. The process was very efficient and didn't damage the stucco. From the sales meeting to the installation, the communication was excellent and the process very smooth. The installation crew was outstanding and skilled and did an amazing job, cleaning up along the way. Can't wait to call them back to get our remaining windows replaced.

    A finished installed bathroom window.

    All that was promised was delivered in a clean and timely manner! It was nice not to have to clean up after they were done with the installations.

    New set up !
    Crystal G.

    You have no idea what a big deal getting Central air in a Mexican household is. My mom loves to suffer through the heat , Not me ! I've literally stayed in bad relationships for air-conditioning and Showtime (LOL) Mike and his three man crew knocked it out in three days. Our house was full of challenges and they work through all of them with a smile.We got along with them so well the last day we made them homemade vegan tacos made with fresh Handmade tortillas . He put everything away nice and clean and worked around all of our stuff . I would give them more stars if I could. Thanks guys #FeelingLikeFonzie #BecauseI'mCool #Literally

    Living room windows look great and keep the heat out.
    Francisco C.

    Got windows installed on my house and after the installation I noticed that standing near the windows I didn't feel the heat from outside like old windows. The noise has been significantly quite and the house stays cooler even with out having the ac running constantly. Dealing with energy core was also very easy since they kepted us updated on what was going on and when the installation will be started.

    New anlin windows

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    4 years ago

    Excellent experience. Replaced our hvac system. Excellent communication and follow up service. Would highly recommend.

    Business owner information

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    Zachary M.

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    7 years ago

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    6 years ago

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    Zack M.

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    5 years ago

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    5 years ago

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    Zachary M.

    Hi Ana, thank you for your review! We appreciate your business!

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    5 years ago

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    Page 2 of 2

    Ask the Community - Energy Core Construction

    What type of windows do you offer?

    We offer Anlin windows that come with a double lifetime warranty.

    Don’t See Your Question? Ask Away!

    Review Highlights - Energy Core Construction

    Eric and Taylor were very helpful and informative when it came to choosing our new windows and backyard door.

    Mentioned in 6 reviews

    Read more highlights

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    OC Window Experts - The entire industry loves our measure tech Mitch. You will too.

    OC Window Experts

    (375 reviews)

    I had a great experience with OC Window Experts from start to finish. Their team was incredibly…read morehelpful, and the customer service was outstanding throughout the entire process. The pricing was very fair and competitive, which made the decision even easier. Mike, the owner, was honest, transparent, and extremely helpful every step of the way. He took the time to answer all my questions and made sure I felt comfortable with everything. The installers, Willy and J.C., were professional, polite, and very respectful of my home. They did a fantastic job and made sure everything was clean and perfect before they left. I highly recommend OC Window Experts to anyone looking for quality work, great service, and fair pricing!

    It could not possibly have been an easier and more satisfying experience hiring OCWE to update our…read more60 year old windows and slider on our house. We met with Mike (the owner) at his showroom who went through every option and provided clear details for the products we had to choose as well as the process from start to finish. We went with Mike's product recommdation, Anlin Windows, based on those details which was clearly the right choice. Mitch (the ops manager/job forman) came to our home at the appointed time, took the measurements and advised what we needed to do to assist in the installation process which was basically moving any large objects away from the windows, both inside and out. In fact, we were contacted every step of the way from the owners, office staff and field staff and advised of the progress of our order. We were notified of the windows arrival at thier warehouse 6 weeks later and set up an installation date. JC and Willy arrived on time and got started right away after thanking me for clearing thier work areas as thoroughly as I did after the intial walk through. They did an amazing job. They were courteous, clean, respectul, and completely professional in every way. They had every window plus a very large slider installed before the end of the day and once again complimented and thanked me making their work areas accessible and easy to work in. They also left every area they worked in cleaned up as if they were never there. A rarety these days! JC then provided me with some tips specfic to any potential screen door squeeks and advised me to apply something on the screen to prevent any accicdents in the form of me or anyone else walking through that screen. I used a couple of thin strips of duct tape. The windows/screens are obviously new and almost transparent. Especially after living with the previous extruded metal OG windows for as long as we did. He showed me the features of each window and door, explained how the locks worked on each and answered any questions I had. There was minor 1 hiccup. During the unpacking process of the windows, JC pointed out to me that 1 of windows would not be able to be installed as it arrived broken. Not the window itself but the top right corner of the exterior vinyl overlap. The damage was not seen at the warehouse as it was under the protective card board/plastic and must have happened during the shipping process from the factory. I know from experience these things happen and it is how they are reacted to that seperates the good companies from the bad. OCWE took care of it without hesitation and insisted I deduct $500 from the intial installation balance until the replacment was installed and the job completely finished. The replacement was rush ordered. I was told it would take 2 weeks to get it. I got a call extactly 2 weeks later and we set up the installation appointment. The final window was just installed in under 30 minutes by JC and Willy as I had requested they come back for the aformentioned reasons. My wife and I could not be more pleased and satisfied with the choices we made specific to the company, product, pricing and professionalism of every team, top down from sales, ops and installation. We would do it again in a heartbeat! I highly recommend OCWE for window/slider upgrades in every way and when you do, make sure you specifically request JC and Willy to install them. You will not be sorry!

    Legendary CalRep Windows and Doors

    Legendary CalRep Windows and Doors

    (178 reviews)

    We had all of the windows in our home replaced by Legendary Cal-Rep Windows in 2020, and…read moreunfortunately, our experience has been incredibly frustrating ever since. Shortly after installation, we discovered that the large staircase window leaked whenever it rained. Over the past five years, their "fix" was repeatedly applying messy exterior silicone that looked terrible and never solved the issue. At one point, they even suggested the leak might be caused by something within our home rather than the window itself. Eventually, they replaced the window and discovered the original installation they had ordered the wrong size window and had tried to just fill the gaps in and make it work. The second replacement was faulty, requiring yet another order and installation. Now, in 2026, the newest window was installed but still does not function. A Milgard representative inspected it and confirmed the issue is due to improper installation. Despite all of this, we still have no resolution, and there has been little to no proactive effort from the company to make things right. We are extremely disappointed with the product, installation, and overall service. Messages are ignored or we are told they are "checking on the status" but we never hear back. I will update this review if we EVER receive a proper resolution! I am in the customer service business myself, so to have a company treat you this way is so very disappointing.

    I am writing this review to warn everyone about the terrible quality and lack of accountability at…read moreLegendary Windows. I had an addition to my house and chose them for new windows. Because of the construction dust, I couldn't see the glass clearly at first. But after a thorough cleaning, I was shocked to find deep scratches all over the brand-new glass. Here is why you should stay away: Absurd Pricing: I was charged a staggering $15,000 for installation alone. They sent only two workers for two days. That is a lot of profit. Damaged Goods: They installed scratched, low-quality glass. Ghosting Customers: When I tried to reach out for a resolution, I found out that many other customers are reporting they "changed ownership" as an excuse to avoid taking responsibility for their previous mistakes. They take your money ($15k for labor!) and leave you with damaged products, then vanish. This is not a "Legendary" company; it's a predatory business. Save your money and your sanity--Stay away from Legendary Windows!  It wouldn't allow me to give 0 star

    TMC Windows & Doors - We are thrilled and honored to be voted the Best Window & Door Company in Orange County for 2024!

    TMC Windows & Doors

    (112 reviews)

    Great professional service. They were punctual to start the…read morefront door replacement. They explained the process before starting and we're considerate when the front door entry was limited access while they had the stucco dry. They also verified the small detail changes in the door handle and had me try the door several times before they left. I was impressed by the end result. Huge difference in a proper working door compared to before. Great attention to detail to explain the issue with the last door. I recommend their service for Great quality work.

    Very disappointed. Max, the manager, is very aggressive and argues as if he is right all the time…read more He does not listen to customers and does not offer a sincere apology. I made an appointment, and they completely stood me up. Later, they claimed they tried to call me or left a voicemail to change the appointment, which is not true. They never called or left any message. I have documentation as evidence, but I chose not to continue the conversation because Max kept defending himself and arguing instead of trying to resolve the issue. They also had my mailing address incorrect. I spoke with Max the day before my appointment to correct it, yet there were still multiple errors. Overall, the business seems very unorganized. The receptionist told me Max was in the office, so I was surprised when Max later claimed my appointment was with a different representative. This inconsistency felt very unprofessional and questionable. I took time out of my day for this appointment, and it is extremely rude and unprofessional that they never showed up. I do not recommend doing business with this company. There are many other businesses that provide much better customer service.

    California Replacement Windows

    California Replacement Windows

    (94 reviews)

    The windows I ordered are beautiful and top of the line (Simonton energy efficient vinyl windows),…read morebut the installation was poorly done. Within five months of the installation, I noticed the trim they installed on the inside along one of the two new windows had come almost entirely undone, to the point that there were huge openings and I could see the insulation foam they used in the gaps. I even had a bee somehow get through into the room thanks to the poor installation. For the amount paid, I was frustrated to realize they hadn't done a better job. Next time I'm in need of new windows etc., I'll be sure to look elsewhere. Update: There also appears to be gaps along the top exterior side of the other window - I heard some kind of large insect (we get alot of bees and wasps around my building) buzzing and trying to escape from inside there. Luckily the interior trim remained sealed on this window at least. But once again, I find myself disappointed with the installation.

    We needed one custom window made for a kitchen remodel, and California Replacement Windows was one…read moreof the only companies that would let us buy just one window. All other windows in the house had been replaced previously, and most companies had a minimum order quantity that didn't make sense for our project, or had long lead times that would have been problematic for the timeline of our project. The sales rep Tim was on time to his appointment, quickly assessed and measured the window, and got the process started. He was readily available for updates, and the window was available very quickly! The install was done well and matches the other windows in our house. We are VERY happy with Cal Replacement windows and will definitely use them again in the future for any other windows we might need.

    Energy Core Construction - roofing - Updated May 2026

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