About Langlois Plumbing, Heating & AC LLC - Vermont's Certified Heating Specialists

We started Langlois Plumbing, Heating & AC LLC because too many Vermont homeowners were getting HVAC advice from contractors who didn’t understand Vermont’s climate and plumbing guidance from companies who treated every job like a transaction. We wanted to do it differently – build a company where the person who shows up to your home is actually qualified to be there, tells you the truth about what you need, and stands behind the work.

Local Expertise You Can Trust

Ten years and 200+ installations later, the business looks different than it did at the start – more maintenance contracts, more heat pump work, a stronger focus on planned installations over emergency calls – but the core approach hasn’t changed. We show up prepared, we diagnose correctly, and we recommend what the home actually needs.

Langlois Plumbing, Heating & AC LLC is located at 4 Cilley Hill Rd, Jericho, Vermont 05465 and has been serving Chittenden County homeowners for over ten years. Owner Jamie Langlois holds a Vermont Master Plumber license, Mitsubishi Diamond Elite installer certification, Daikin dealer certification, and EPA 608 refrigerant handling certification. The company has completed 200+ premium system installations and maintains 150+ active maintenance contracts.

Our Credentials

These aren’t marketing credentials. They are requirements that come with testing, training, and installation history verification. When you hire a Mitsubishi Diamond Elite contractor, you get a 12-year parts warranty on Mitsubishi equipment – a warranty that isn’t available through non-certified installers.

Jamie Langlois holds the following active credentials:

Vermont Master Plumber License

Mitsubishi Diamond Elite Installer Certification

Daikin Dealer Certification

EPA 608 Universal Refrigerant Handling Certification

Propane and Natural Gas Certified

A+ BBB Rating

What "Quality-First" Actually Means

We get this question from customers who’ve dealt with contractors who say the same thing: what does “quality-first” actually mean in practice?

For us, it means we schedule fewer jobs per week than our capacity would allow, so each job gets full attention. It means we use ACCA Manual J heat load calculations on heat pump installations rather than rules of thumb. It means we pull permits and schedule inspections – not because the law requires it, but because it protects you. It means that if we make a mistake, we come back and fix it at our expense.

In our 10+ years in Chittenden County, we’ve never had a customer chase us down over unfinished work. That’s the standard we hold ourselves to.

Frequently Asked Questions

Are you a one-person operation or do you have a team?

Jamie Langlois owns and operates the business. Field work is performed by Jamie and a small team of
directly employed technicians - not subcontractors. For the installations we do, direct oversight is the quality
control.

How do I know the person who shows up is actually qualified?

Our Vermont Master Plumber license number is on every permit we pull. Our Mitsubishi Diamond Elite
status can be verified on Mitsubishi's installer locator. Our EPA 608 certification is documented. We're not
anonymous contractors - you can verify our credentials before we arrive.

Ready to Work Together?

We also serve Winooski, Milton, Richmond, Huntington, and surrounding communities in Chittenden County. If you’re not sure whether we reach your address, Call (802) 233-0790 we’ll tell you directly.