Business Details
32 Years
experience
Emergency
services
Expert HVAC, Plumbing & Electrical Services in Longmont, CO
Welzig Heating & Air has served Longmont and the Greater Boulder Area since 1994, combining immediate results with sustainable performance to protect client investments. As a Bryant Factory Authorized Dealer and recipient of Bryants Circle of Champions award for three consecutive years, we uphold rigorous standards of technical competence, business ethics, and customer satisfaction. Our NATE-certified technicians receive factory training and stay updated on progressive technologies, equipped with cutting-edge tools and genuine manufacturer parts.We specialize in HVAC installation, plumbing services, electrical solutions, and 24/7 emergency support, prioritizing client satisfaction through transparent communication and reliable service. Our commitment to excellence has earned recognition for growing high-efficiency equipment sales and delivering exceptional customer experiences, placing us among the top 2% of Bryant dealers nationwide.
Services
Air Conditioning Service
Heating Repair
Duct Sealing
Smart Thermostats
Emergency HVAC Services
Plumbing Installation
Tankless Water Heaters
Drain Repair
EV Charger Installation
Commercial HVAC
Details
- Year established: 1994
Highlights and features
- We have 27 years of experience serving Northern Colorado's HVAC and plumbing needs.
- Our technicians are NATE-certified and factory-trained for precise system diagnostics.
- We offer 24/7 emergency services for urgent heating, cooling, or plumbing issues.
- We maintain Bryant Circle of Champions status for superior customer satisfaction and sales growth.
- We provide transparent pricing with upfront estimates before any service begins.
Associations and certifications
- Bryant Factory Authorized Dealer
- North American Technician Excellence (NATE)
What people say
Excellent job
Professional and personable
Highly recommend
Knowledgeable diagnosis
No damage to property
Services
Air Conditioning Installation
We specialize in installing high-efficiency Bryant Evolution air conditioning systems. Our NATE-certified technicians ensure proper sizing and integration with existing HVAC infrastructure. Clients receive personalized guidance on system selection, energy savings, and maintenance requirements for optimal performance.
Tankless Water Heater Installation
Our team installs energy-efficient tankless water heating systems with precision. We assess home water demand, recommend appropriate capacity units, and ensure code-compliant gas and electrical connections. Clients benefit from endless hot water supply and reduced utility costs.
Indoor Air Quality Solutions
We offer advanced air purification systems including UV filtration, bi-polar ionization, and particulate removal technologies. Our solutions address allergens, pathogens, and volatile organic compounds, improving respiratory health and HVAC efficiency through cleaner air circulation.
Emergency Plumbing Services
Available 24/7 for urgent plumbing issues like burst pipes, severe leaks, or water heater failures. Our technicians carry essential repair tools and parts for immediate fixes, minimizing property damage while restoring system functionality safely and efficiently.
Commercial HVAC Maintenance
We provide tailored maintenance plans for commercial properties, including system inspections, efficiency tuning, and compliance checks. Our proactive approach extends equipment lifespan, reduces energy consumption, and prevents costly breakdowns in business environments.
Questions
What HVAC services do you offer?
We provide full-service HVAC solutions including AC installation, furnace repair, duct sealing, smart thermostat integration, and 24/7 emergency services for residential and commercial properties.
Do you service plumbing emergencies?
Yes, our team responds to urgent plumbing issues 24 hours a day, including pipe bursts, water heater failures, and severe leaks requiring immediate attention.
Are financing options available?
We offer multiple financing plans with approved credit for HVAC replacements, plumbing upgrades, and electrical system improvements to qualified customers.
What areas do you service?
We serve Longmont, Boulder, Louisville, Lafayette, Fort Collins, and surrounding Colorado communities for all HVAC, plumbing, and electrical needs.
How can I schedule service?
Call or text (720) 336-3777 anytime to book appointments, request emergency assistance, or receive free estimates from our customer service team.
What certifications do your technicians hold?
Our team maintains NATE certification and Bryant Factory Authorized Dealer training, ensuring expertise in the latest HVAC and plumbing technologies and installation standards.
Reviews (5)
Gretchen Bustamante
Dec 01, 2021
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I called on Sunday for emergency service for a loud and squeaky furnace. I was told that I dont need to have it done emergently and that it could wait til a scheduled time Tuesday. Overnight Sunday the furnace died and I called back for emergency service at 6 am and was told that no one was on call and no one could come look at it til my scheduled time Tuesday. Despite advertising it, this company does not offer 24/7 emergency service.
Matthew Barrett
Oct 14, 2021
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I have likely submitted a review previously, I just had such a great experience yesterday that I wanted to add to what has been said. Welzig has been our go to HVAC company for about ten years. Our experience has been that their technicians start at "good" and only get better from there. When it is a newer tech I feel that they have a lot to live up to, but the training that Welzig uses must work because even the couple of newer people have met the standard I expect.
Yesterday, Welzig installed an on demand water heater. Saul and William were both very polite and professional. Saul specifically
Yesterday, Welzig installed an on demand water heater. Saul and William were both very polite and professional. Saul specifically
Paula Williams
Aug 02, 2021
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This was the first time I've tried Welzig, and it was a great experience. In the middle of a heat wave, they came to fix my AC, even though I wasn't an existing customer. The tech, Bob Chrisley, was wonderful. He explained everything in detail, showed me pictures of the problem, and fixed it in no time. I'll definitely be using Welzig again.
William Doyle
Jul 03, 2021
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While the service was prompt and professional, it's very unfortunate that Welzig has decided to charge an exorbitant amount for R22 coolant. On eBay it ranges from $25-35 per pound. I was charged $150-200 per pound. The tech made sure to justify the cost by bringing up the scarcity of R22, which was not exactly honest. Paid almost $800 for what took the technician literally 5 minutes to do. I know we all know need to make a buck, but damn Welzig! That is straight up robbery. I highly recommend people go elsewhere for hvac help.
Chris Parks
Mar 28, 2021
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Bob came out to my house when our heater stopped working at 10 pm at night. He was cheerful despite the late hour and it was immediately obvious he knew what he was doing. He got our heat working but predicted it might not last the night due to a problem with a part. (Nothing dangerous) He promised to come back the next day. As predicted, the heat lasted a few hours and then stopped. The next day Bob was back and at work. It took several hours and replacing one part led to replacing another, but he got us back in business and the system has performed flawlessly since then. Great guy, great company
