--- title: "T&H Mechanical Systems" description: "T&H Mechanical Systems handles heating, air conditioning and indoor air quality work for homes and businesses. Its website calls it family-run for 40 years" doc_version: "2026-10-19" last_updated: "2026-10-19" --- # T&H Mechanical Systems **Trade:** HVAC / Heating & Cooling · **Address:** 5 Cove Ave Unit C, Norwalk, CT 06855 · **Phone:** (203) 644-1098 · **Website:** https://www.tandhmechanical.com/?utm_source=GMB&utm_medium=organic&utm_campaign=Norwalk · **Languages:** English **Rating: 3.0/5** (medium confidence) — from 16 reviews across 6 sources. 75% of sentiment-scored reviews read net-positive. Last 6 months: 0 reviews, 0 negative. ## The honest read T&H Mechanical Systems handles heating, air conditioning and indoor air quality work for homes and businesses. Its website calls it family-run for 40 years and lists a service area from Norwalk, Stamford and Greenwich to Rye and Scarsdale. A 2014 customer said Harold took on an HVAC system another installer had left with zoning, air-movement and balancing problems, and that the job required extensive re-zoning and re-configuring. In 2014 that customer also said Harold did not charge to add a damper for one bedroom zone, saying it should have been part of the initial service. A 2012 customer with a blown compressor said Harold, the owner, quoted multiple options; that customer chose a full system replacement, agreed on a Friday and completed by the following Wednesday. A 2014 customer said the final price was exactly as quoted and the work was completed in 5 days. When white PVC drainage piping stood out on that 2014 customer's brown house, the owner sent someone the next day to swap it for clear tubing at no extra cost. A 2017 customer described a $6,500 system that, by that account, had reached $8,000, and said Harold did not connect the condensation line, so the unit leaked and buckled hardwood floors on the floor below. That 2017 customer also said Harold refused to provide his insurance information. A 2009 customer said the worker flipped a switch to restart the system and then said he would charge $100 for it. It holds an active Connecticut D1 heating and cooling licence, HTG.0308704-D1, under Harold Hermes. **Strengths:** - System re-zoning — a 2014 customer said Harold remedied a failed prior install - Price as quoted — a 2014 customer said the final price matched the estimate **Concerns:** - Unconnected condensation line — a 2017 customer said the leak buckled hardwood floors - A $100 reset charge — a 2009 customer objected to a switch-flip fee ## Claims & citations Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication. - Provides heating, air conditioning and indoor air quality work for residential and commercial properties _(confidence: medium)_ - [Better Business Bureau](https://www.bbb.org/us/ct/norwalk/profile/heating-and-air-conditioning/t-h-mechanical-systems-llc-0111-103079) — “About (Better Business Bureau, self-described): T&H Mechanical provides HVAC services, including heating, air conditioning, and indoor air q…” - Describes itself as family-run for 40 years _(confidence: low)_ - [Official Website](https://www.tandhmechanical.com) — “About (self-reported, verbatim): Family-run for 40 years. NATE-certified tech team. Our specialists are trained in residential heating and c…” - Lists a service area including Norwalk, Stamford, Greenwich, Rye and Scarsdale _(confidence: medium)_ - [Official Website](https://www.tandhmechanical.com) — “Stated service area (self-reported): Fairfield, Bedford, Darien, Greenwich, Harrison, New Canaan, Norwalk, Rye, Stamford, Westport, Wilton, …” - It holds an active Connecticut D1 heating and cooling licence, HTG.0308704-D1, under Harold Hermes. _(confidence: high)_ - [State License Registry](https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx) — “CT hvac license HTG.0308704-D1 registry-verified active — registry holder of record: HAROLD HERMES” - Specializes in HVAC / Heating & Cooling _(confidence: high)_ - [Better Business Bureau](https://www.bbb.org/us/ct/norwalk/profile/heating-and-air-conditioning/t-h-mechanical-systems-llc-0111-103079) — “About (Better Business Bureau, self-described): T&H Mechanical provides HVAC services, including heating, air conditioning, and indoor air q…” ## Ownership - Identifies as family-owned — the business's own statement, not independently verified. ## License Status: **active** (#HTG.0308704-D1, hvac) — 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](https://www.google.com/maps/search/?api=1&query=T%26H%20Mechanical%20Systems&query_place_id=ChIJv6d0Dpse6IkR91w4AAp6TS4): 4.4★ from 17 ratings - [Official Website](https://www.tandhmechanical.com): 44 yrs in business · Self-reported profile and service details - [Local News](https://www.energizect.com/sites/default/files/2023-12/ECT%20HPIN%20Master%20PDF%2012-18-2023.pdf): Listed on this source - [Angi](https://www.angi.com/companylist/us/ct/norwalk/tandh-mechanical-systems-reviews-416661.htm): 4.7★ from 18 ratings - [Better Business Bureau](https://www.bbb.org/us/ct/norwalk/profile/heating-and-air-conditioning/t-h-mechanical-systems-llc-0111-103079): Listed on this source - [HomeAdvisor](https://www.homeadvisor.com/rated.thmechanicalsystems.155743129.html): 4.7★ from 18 ratings ## Recent reviews - **Angi · 2017-06-01**: Beware!!! Harold and Joe are deceitful and negligent! I am currently having a horrible experience. 9 Months ago Harold sold me a "whole new system"(2.5 ton) for $6500 complete. He did not tell me it would not include parts as directed by Carrier for a proper installation. In the winter, the heater d… - **5/5 · HomeAdvisor · Rose S. · 2017-05-12**: . - **Angi · Alexander G. · 2016-11-01**: All went well and work was performed in two visits - one for initial tune up and evaluation and the other to perform repairs - **Angi · Harry V. · 2016-10-01**: I would use them again in the future. - **Angi · Harry V. · 2016-04-01**: The service has gone well, they have been timely and it's worked well. - **5/5 · HomeAdvisor · ANDREW J. · 2015-07-23**: unknown - **Angi · Doreen R. · 2014-07-01**: Work was performed as promised. Showed up on time and the workers were very professional. They were knowledgeable about what they were doing and were able to answer all our questions. They cleaned up after themselves every day. Once the work was completed, my husband wasn't happy with the outside ap… - **Angi · Thomas F. · 2014-02-01**: I built this home several years ago. An extensive HVAC system was installed but never worked properly. That installer thought they were Perfect (claimed they were among the top 10 for Carrier expertise in the state). They were far from that. Zoning issues, air movement, balancing, etc. were all off.… - **Angi · Kimberly M. · 2013-04-01**: outstanding service, great professionals, good people, know what they are doing and do it right from the get go and best price out of three - couldn't be more pleased - **Angi · Michael E. · 2012-06-01**: I comparison shopped and got a number of quotes. Harold, the owner, personally performed the estimate for Tand H. Harold was very prompt and professional in his communication. He didn't have the lowest price but he was competitive. Harold quoted me multiple options for dealing with my blown compress… --- Data freshness: last scanned 2026-10-13T20:01:49.380Z. Cite as: T&H Mechanical Systems — Tavlee (https://tavlee.com/contractor/t-and-h-mechanical-systems-norwalk) Source: https://tavlee.com/contractor/t-and-h-mechanical-systems-norwalk ## Sitemap [Full site index](https://tavlee.com/sitemap.md)