Lassen Heating & Cooling, LLC

4.9 |15 Verified Ratings
Write a Review

Lassen Heating & Cooling, LLC

4.9 | 15 Verified Ratings
Write a Review


230 South Washington Street, Suite 15
Plainville Court, CT 06062
Your use of our services is governed by our Terms & Conditions

Lassen Heating & Cooling, LLC

Superior Service for all your HVAC needs.

Lassen Heating and Cooling is an outstanding family business in the state. With over 75 years of experience, you can bet that your project will be done right the first time with no worries.


Learn how HomeAdvisor screens and approves their pros.

Service Area

  • Hartford
  • West Hartford
  • New Britain
  • East Hartford
  • Farmington
  • Unionville
  • Windsor
  • Winchester Center
  • Wethersfield
  • Oakville
  • Newington
  • Bristol
  • Collinsville
  • Watertown
  • Cromwell
  • Burlington
  • North Canton
  • Rockfall
  • Bloomfield
  • Windsor Locks
  • Plantsville
  • Canton Center
  • Riverton
  • Pequabuck
  • Canton
  • North Granby
  • Avon
  • Glastonbury
  • Washington
  • New Hartford
  • Milldale
  • Southington
  • Plainville
  • Terryville
  • West Granby
  • East Berlin
  • East Granby
  • Weatogue
  • Harwinton
  • Litchfield
  • Poquonock
  • Lakeside
  • Plymouth
  • Marion
  • Barkhamsted
  • East Hartland
  • Torrington
  • Northfield
  • West Simsbury
  • Bantam
  • Bethlehem
  • Simsbury
  • Pine Meadow
  • Berlin
  • West Hartland
  • Tariffville
  • Rocky Hill
  • Granby
  • East Windsor Hill
  • Woodbury
  • Goshen
  • See All >

Services Offered

Air Conditioning
  • Central A/C Install
  • Central Humidifier Install
  • Central Air Cleaner Install
Heating & Furnace Systems
  • Heat Pump Install
  • Ducts & Vents Install
  • Gas Boiler or Radiator Heat Install
  • Electric Furnace - Install
  • Oil Furnace - Install

Areas of Expertise

  • Residential & Commercial Heating & Air Conditioning
  • New & existing residential home installations
  • Custom Duct Work and Installation Stainless Steel & Aluminum Welding
  • Gas, Oil warm air Furnace and Boiler replacements
  • Air Cleaners , Humidifiers Hydro-Air Systems

Product Brands Used

  • Carrier
  • Lennox International, Inc.
  • American Standard
  • Thermo Pride Dealer

Quick Facts

Business Hours
(Please call to confirm)
  • Warranty Offered
  • Free Estimates
  • Warranty Description: 1 year plus Manufacturer warranty
  • Credit Cards Accepted


In Business Since: 1982
Memberships & Affiliations
  • Sheet Metal and Air Conditioning Contractors National Association (SMACNA)
  • Better Business Bureau
State Licensing
Trade: S-01 Heating, Piping, Cooling
License #: HTG.0302927-S1
Expiration: 08-31-2019
Trade: D-01 Heating, Piping, Cooling
License #: HTG.0405181-D1
Expiration: 08-31-2019
Trade: SM-01 Sheet Metal
License #: SHM.0002740-SM1
Expiration: 08-31-2019
Green Certifications
  • - Home Performance with energy Star
  • NATE Consumer Contractor Connection (C-3) HVACR Contractor
  • Carrier Healthy Air Expert
  • Better Business Bureau Accredited
  • NATE
HomeAdvisor Screened. View Details

HomeAdvisor allows Service Professionals to post information about themselves and their business on their profile. HomeAdvisor does not review or verify the information or representations set forth in those profiles, as they are self-reported by the Service Professional.

HomeAdvisor verifies state-level licensing where applicable - note: some states require local or county level licensing and you should verify whether or not your pro is properly licensed.

Business Overview

Community Involvement

Sponsor local Baseball Team

Sponsor local Hockey Team

How We Got Started

We started in this industry in 1982.

We describe our business as Family owned and operated


Lassen Heating & Cooling, LLC

My Work
9 Projects
HomeAdvisor: The nation's largest network of screened and rated pros.

Ratings & Reviews
Lassen Heating & Cooling, LLC

Real feedback from real homeowners.
Learn more about this pro by reading the ratings and reviews below.
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Showing 1-10 of 15
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5.0   |  
Review by in Farmington, CT
Project: Install Oil Furnace / Forced Air Heating System
Sean is an experienced and responsible man. I'm glad that we found him.
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5.0   |  
Review by in Newington, CT
Project: Install Natural Gas or Propane Furnace / Forced Air Heating System
Sean is aweome. Prompt, neat, and did an extraordinary job. I would recommend Lassen Heating and Cooling, LLC to anyone looking for quality workmanship and reliable service.
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5.0   |  
I liked working with sean. His price was reasonable, he has good workmenship, and has a good crew. Sean always shows up on time. I would definitely recommend him to anyone that needs a furnace change. Amy
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5.0   |  
Review by in Avon, CT
Project: Install Natural Gas or Propane Furnace / Forced Air Heating System
Sean contacted me promptly after I submitted SM request. He is a very down to earth guy and is focused on getting the job done most practically (he gave me initial quote on the phone and then also checked, if I truly needed a new thermostat, so that not to charge me unnecessary costs). I obtained quotes from several highly rated contractors in the area, but Sean's proposal was hands-down most economical for a high-quality Carrier furnace. The job was performed as scheduled, duct work was careful, and so far the heat is still on :) Definitely recommend!

1 of 1 users found this review helpful.

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5.0   |  
Review by in Avon, CT
Very quick, pleasant and thorough.
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5.0   |  
very professional and knowledgable. Will continue to call him for any service needed in the future.
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5.0   |  
Review by in Windsor, CT
The request was made through Service Magic - Sean was either the first or second contractor to scope out what was needed. He was one of few who actually gave a written quote with three options without being called back to request it. His quote was very detailed. After checking with all other contractors his quote was by far the best after includiing the rebates. He showed up when promised and completed the job when promised. He let us use his air conditioner during the time he was installing the new unit - it was very hot in the house at the temps were over 95 for about 4-5 days. He and his team were very professional and did a great job!

1 of 1 users found this review helpful.

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5.0   |  
I would rate Sean and his crew as excellent. From the estimate to the completion of the job I had the feeling of complete confidence that things were being done correctly. Not only did they install the central air with a minimum of disruption to my home, they were fastidious, insuring that they left the house as clean as they found it. I believe anyone looking to have HVAC work done would do themselves a disservice if they do not have Sean at Lassen Heating and Cooling come and speak with them.

1 of 1 users found this review helpful.

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5.0   |  
I found Lassen Heating & Cooling to be great at communication, very hard-working, dependable, courteous, knowledgeable, and sensitive & responsive to my specific desires as a customer.
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5.0   |  
Prompt, professional, well-informed, and highly skilled. Sean provided all the services promised in a timely highly efficient manner. We're exceptionally pleased and would recommend him without reservation.

1 of 1 users found this review helpful.

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Showing 1-10 of 15
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Seal of Approval

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  1. Verify Trade License
    HomeAdvisor checks to see if the business carries the appropriate state-level license.
  2. Verify Insurance
    As a part of our screening process, we encourage professionals to carry general liability insurance. We require coverage for hundreds of services.
  3. Verification of State Business Filings
    For business types that require a Secretary of State filing, we confirm that the business is in good standing in the state in which it is located.
  4. Criminal Records Search
    HomeAdvisor uses 3rd party data sources to conduct a criminal search for any relevant criminal activity associated with the owner/principal of the business.
  5. Sex Offender Search
    We confirm that the owner/principal is not listed on the official state Sex Offender web site in the state in which the owner/principal of the company is located.
  6. Bankruptcy Search
    We use 3rd party data sources to check the history of the principal/owner of the business for bankruptcy filings by or against them.
  7. Legal Search for Civil Judgments
    We use 3rd party data sources to check the principal/owner of the business for state level civil legal judgments entered against them.
  8. Liens Search
    We use 3rd party data sources to check the principal/owner of the business for liens placed against them.
  9. Identity Verification (SSN)
    HomeAdvisor verifies the social security number(s) of the owner/principal for identity check purposes. This check applies primarily to smaller business entities.
  10. Identity Verification (Reverse Phone Lookup)
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