--- title: "JT Energy LLC" description: "JT Energy LLC insulates attics, walls and basements, and also replaces windows and runs home energy audits. Its own site describes an audit that shows wher" doc_version: "2026-10-19" last_updated: "2026-10-19" --- # JT Energy LLC **Trade:** Insulation & Weatherization · **Address:** 200 Burnham St, South Windsor, CT 06074 · **Phone:** (860) 808-7299 · **Website:** http://www.jtenergyct.com/ · **Languages:** English **Rating: 4.7/5** (high confidence) — from 39 reviews across 5 sources. 97% of sentiment-scored reviews read net-positive. Last 6 months: 3 reviews, 0 negative. ## The honest read JT Energy LLC insulates attics, walls and basements, and also replaces windows and runs home energy audits. Its own site describes an audit that shows where comfort and energy costs are being lost, followed by a plan for insulation, air sealing, windows and other upgrades, and the company says it has been in business six years. On Google it holds 4.9 stars from 40 ratings, and its Better Business Bureau grade is A+. A recent customer described a home energy audit led by Oscar, with Jose alongside, and said Oscar took the time to explain everything in a way that was easy to understand. A recent reviewer wrote that JT Energy installed windows and blew insulation into the attic and walls, and said they cleaned up any mess they made and came back to make sure everything was in good working order. A recent customer who had bought an investment property with no insulation in the attic, basement or walls said Tom told them the tenants might be eligible for a full insulation rebate through Eversource, and that they received a 100 percent rebate. A 2026 customer wrote that Tom Marchand asked for an image of an Eversource postcard, that the customer did qualify for a 100% rebate, and that the crew insulated all of the exterior walls, wrapping up in the early afternoon. A 2026 reviewer described the replacement of 18 old windows plus two bow windows at a client's residence, a job that took about three days. A 2025 customer whose full insulation was approved through Springfield Partners said there were leaky spots in the roof, and that they came back and provided a long-term temporary fix so they could insulate before the fiscal year ended. In a 2024 review, a customer said JT Energy handled changing the contractor with the utility company after an HES audit. A 2024 customer had a school bus conversion spray foamed and said the job was done in one day. In a 2023 review, a customer said Justin came out to spray the inside of a newly built detached garage, that too much moisture in the siding kept him from completing the job, and that he explained how to correct the issue and refused any compensation for his time. A 2023 customer with aluminum siding said that after insulation through the basement, exterior and attic, no bends or creases were found anywhere. A 2022 reviewer said they called, left a message and never got a response. Connecticut lists its home improvement contractor registration, HIC.0657884, as active, held by JT Energy LLC. **Strengths:** - Rebate guidance — a recent customer received a 100 percent Eversource insulation rebate - Clear energy audit — a recent customer said Oscar explained everything in easy terms - Follow-up visit — a recent customer said they came back to check the work - Careful with siding — a 2023 customer said no bends or creases were found **Concerns:** - Unreturned call — a 2022 reviewer said a left message got no response ## Claims & citations Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication. - Holds a 4.9-star Google rating from 40 ratings _(confidence: high)_ - [Google](https://www.google.com/maps/search/?api=1&query=JT%20Energy%20LLC&query_place_id=ChIJiVEcZfKN5okRvqERDfKNEv4) — “Google: 4.9★ from 40 ratings” - Better Business Bureau grade of A+ _(confidence: high)_ - [Better Business Bureau](https://www.bbb.org/us/ct/south-windsor/profile/insulation-contractors/jt-energy-llc-0111-110091194) — “Better Business Bureau grade: A+” - The company says it has been in business six years _(confidence: medium)_ - [Official Website](http://www.jtenergyct.com) — “Self-reported 6 years in business” - Insulates attics and walls _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25OaGVtMTZlWGxJVTFCek5URkhhVVJ6YzE4eVJYYxAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOnNhem16eXlIU1BzNTFHaURzc18yRXc%7C%7C?hl=en-US) — “5★ Excellent work by JT Energy installing windows and blowing insulation in our attic and walls. Zigfield, Sasha, Andriy, Carlos, Pasha, Chr…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21SeFMwRndWWGRmY0dwaVVqUnhXWG93ZUUxTVlVRRAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOmRxS0FwVXdfcGpiUjRxWXoweE1MYUE%7C%7C?hl=en-US) — “5★ Big, thank you to Tom and his crew at Jt Energy. They did an amazing job on insulation in my attic in walls. Crew is very professional di…” - Replaces windows, including an 18-window job described in 2026 _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xCR1puQlZhVkl0YzA4elJUaENWamRpVERCWk5VRRAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOlBGZnBVaVItc08zRThCVjdiTDBZNUE%7C%7C?hl=en-US) — “5★ JT Energy and their team, Keith, Alex & Paul just completed the replacement of old windows with newly installed vinyl/insulated ones at m…” - Runs home energy audits _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25kelRIUjNTV0pSWDFOck1HRXlTVkoyVVRJd1NFRRAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOndzTHR3SWJRX1NrMGEySVJ2UTIwSEE%7C%7C?hl=en-US) — “5★ I had a great experience with JT Energy LLC for my home energy audit! Oscar and Jose were both fantastic from start to finish. Oscar led…” - A recent customer said Tom pointed them to a full Eversource insulation rebate, which they received _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25SalQxbzBOWFpWTVZObllVcGxZMmRxWW5SaldHYxAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOnRjT1o0NXZVMVNnYUplY2dqYnRjWGc%7C%7C?hl=en-US) — “5★ I would like to thank the JT Energy crew for insulating my investment property. This property that I had purchased had no insulation in t…” - A recent customer said they came back to make sure everything was in good working order _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25OaGVtMTZlWGxJVTFCek5URkhhVVJ6YzE4eVJYYxAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOnNhem16eXlIU1BzNTFHaURzc18yRXc%7C%7C?hl=en-US) — “5★ Excellent work by JT Energy installing windows and blowing insulation in our attic and walls. Zigfield, Sasha, Andriy, Carlos, Pasha, Chr…” - A 2023 customer said no bends or creases were found in the aluminum siding after the job _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUNwcC1PZ21RRRAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CIHM0ogKEICAgICpp-OgmQE%7C%7C?hl=en-US) — “5★ Thank you JT Energy for doing a superb job!! Hashem & his crew were great. They showed up on time every day & worked diligently the entir…” - In 2023, a customer said Justin explained a moisture issue and refused compensation rather than spray the garage _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUM1cE9lejFRRRAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CIHM0ogKEICAgIC5pOez1QE%7C%7C?hl=en-US) — “5★ Justin came out to spray the inside of my newly built detached garage. Unfortunately there is still too much moisture in the siding keepi…” - A 2022 reviewer said a left message got no response _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNPdGR6QVdnEAE!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CIHM0ogKEICAgICOtdzAWg%7C%7C?hl=en-US) — “1★ I called, left them a messege. They never responded. Done.” - Connecticut lists its home improvement contractor registration, HIC.0657884, as active, held by JT Energy LLC. _(confidence: high)_ - [State License Registry](https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx) — “CT hic license HIC.0657884 registry-verified active — registry holder of record: JT ENERGY LLC” - Specializes in Insulation & Weatherization _(confidence: high)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25OaGVtMTZlWGxJVTFCek5URkhhVVJ6YzE4eVJYYxAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOnNhem16eXlIU1BzNTFHaURzc18yRXc%7C%7C?hl=en-US) — “5★ Excellent work by JT Energy installing windows and blowing insulation in our attic and walls. Zigfield, Sasha, Andriy, Carlos, Pasha, Chr…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25SalQxbzBOWFpWTVZObllVcGxZMmRxWW5SaldHYxAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOnRjT1o0NXZVMVNnYUplY2dqYnRjWGc%7C%7C?hl=en-US) — “5★ I would like to thank the JT Energy crew for insulating my investment property. This property that I had purchased had no insulation in t…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21SeFMwRndWWGRmY0dwaVVqUnhXWG93ZUUxTVlVRRAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOmRxS0FwVXdfcGpiUjRxWXoweE1MYUE%7C%7C?hl=en-US) — “5★ Big, thank you to Tom and his crew at Jt Energy. They did an amazing job on insulation in my attic in walls. Crew is very professional di…” - [Better Business Bureau](https://www.bbb.org/us/ct/south-windsor/profile/insulation-contractors/jt-energy-llc-0111-110091194) — “About (Better Business Bureau, self-described): JT Energy provides insulation services, including spray foam applications for residential an…” - Also offers Windows / Siding / Gutters _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT25OaGVtMTZlWGxJVTFCek5URkhhVVJ6YzE4eVJYYxAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOnNhem16eXlIU1BzNTFHaURzc18yRXc%7C%7C?hl=en-US) — “5★ Excellent work by JT Energy installing windows and blowing insulation in our attic and walls. Zigfield, Sasha, Andriy, Carlos, Pasha, Chr…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xCR1puQlZhVkl0YzA4elJUaENWamRpVERCWk5VRRAB!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CAIQACodChtycF9oOlBGZnBVaVItc08zRThCVjdiTDBZNUE%7C%7C?hl=en-US) — “5★ JT Energy and their team, Keith, Alex & Paul just completed the replacement of old windows with newly installed vinyl/insulated ones at m…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNKMjYtX1RREAE!2m1!1s0x0:0xfe128df20d11a1be!3m1!1s2@1:CIHM0ogKEICAgICJ26-_TQ%7C%7C?hl=en-US) — “5★ Quality work! Replaced some desperately needed windows as well as some insulation work. Always on time. Attentive to everything. Great cr…” ## License Status: **active** (#HIC.0657884, hic) — verified against the official CT state registry on 2026-10-19, never self-reported. Re-check at the official registry: https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx ## Sources - [Google Reviews](https://www.google.com/maps/search/?api=1&query=JT%20Energy%20LLC&query_place_id=ChIJiVEcZfKN5okRvqERDfKNEv4): Listed on this source - [Better Business Bureau](https://www.bbb.org/us/ct/south-windsor/profile/insulation-contractors/jt-energy-llc-0111-110091194): Listed on this source - [Official Website](http://www.jtenergyct.com): 6 yrs in business · Self-reported profile and service details - [Local News](https://www.energy-storage.news/25mw-bess-in-germany-using-second-use-battery-cells-completed-by-jt-energy-systems/): Listed on this source - [Google](https://www.google.com/maps/search/?api=1&query=JT%20Energy%20LLC&query_place_id=ChIJiVEcZfKN5okRvqERDfKNEv4): 4.9★ from 40 ratings ## Recent reviews - **5/5 · Google Reviews · Tyler z · 2026-10-08**: I had a great experience with JT Energy LLC for my home energy audit! Oscar and Jose were both fantastic from start to finish. Oscar led the audit, and it was immediately clear that he has years of experience and really knows his stuff. He was extremely knowledgeable, thorough, and took the time to… - **5/5 · Google Reviews · Tom Paul Geha · 2026-09-23**: Excellent work by JT Energy installing windows and blowing insulation in our attic and walls. Zigfield, Sasha, Andriy, Carlos, Pasha, Chris, Keith, Justin, and anyone else I missed communicated well , respected the residence, and cleaned up any mess they made. They also came back to make sure everyt… - **5/5 · Google Reviews · Gerald Williams · 2026-07-21**: I would like to thank the JT Energy crew for insulating my investment property. This property that I had purchased had no insulation in the attic, basement or walls. The tenants complained about being too hot in the summer and too cold in the winter. To properly insulate the property would have cost… - **5/5 · Google Reviews · Betty Myers · 2026-04-01**: The men were polite, respectful, and very hard workers. They worked well with each other, great teamwork. I whole heartedly give a 10 plus rating, and would call to use their services in the future. I had total insulation done in a 3 floor house. It was through Springfield Partners. - **5/5 · Google Reviews · Sally Karas · 2026-04-01**: I can't speak on JT Energy's performance, but can speak on their honesty! Justin came to my house for a quote on insulating my 3-season room. He was very honest and didn't try to sell me on a service that he felt wasn't needed. Although I did not proceed with their service since it would not be b… - **5/5 · Google Reviews · Dino Tranghese · 2026-02-20**: JT Energy and their team, Keith, Alex & Paul just completed the replacement of old windows with newly installed vinyl/insulated ones at my client's residence. The job took approximately 3 days, 18 windows and (2) Bow type ones. Some aluminum wrapping of windows as well. They were professional, frien… - **5/5 · Google Reviews · Damen Polance · 2026-01-30**: Big, thank you to Tom and his crew at Jt Energy. They did an amazing job on insulation in my attic in walls. Crew is very professional did a great job cleaning up after themselves and my house is so much warmer. Thank you again. - **5/5 · Google Reviews · John Tehan · 2026-01-08**: I received an email from Eversource stating that they had sent me a post card with an error on it - the post card said I could get my house insulated with a 100% rebate, but that may not be the case and I should check to be sure. I clicked the link and found JT Energy on the contractor list. I cal… - **5/5 · Google Reviews · Adrienne Mojica · 2025-12-01**: I was approved for a full insulation on my home through Springfield Partners and JT Energy was the company that performed all the work. I am in awe at how fast they did everything and it all came out great. I had a few leaky spots in my roof that should’ve prevented the attic from being insulated. H… - **5/5 · Google Reviews · Bev Blake · 2025-11-07**: If you want a job we'll done and one that gives you peace of mind, then JT ENERGY is your best bet. Highly trained guys !! Respectful of property and extremely thorough. The crew was kind and considerate. Hashem, the crew chief and contractor oversaw EVERYTHING that was being done and made sure I… --- Data freshness: last scanned 2026-10-14T09:25:43.265Z. Cite as: JT Energy LLC — Tavlee (https://tavlee.com/contractor/jt-energy-llc-south-windsor) Source: https://tavlee.com/contractor/jt-energy-llc-south-windsor ## Sitemap [Full site index](https://tavlee.com/sitemap.md)