Established in 1994. Family Owned and Operated. Satisfaction Guaranteed.
Welzig Heating & Air Heating. Cooling. Plumbing. 24/7 Emergency Service
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303-678-5576
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  • Why Choose Welzig
    • Why Choose Welzig
    • Our Service Area
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    • Maintenance Plans
    • FAQ
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  • Services
    • Air Conditioning Repair
    • Heating Repair
    • Maintenance Plans
    • Boilers
    • Indoor Air Quality
    • Commercial HVAC
    • Emergency Services
    • Air Conditioning Service
    • Heat Pumps & Dual Fuel
    • Air Conditioning Installation
    • Heating Service
    • Heating Installation
    • Ductless HVAC
    • Duct Cleaning
  • Plumbing
    • Tank Water Heaters
    • Tankless Water Heaters
    • Boilers
  • Offers
    • Financing
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  • Contact
Welzig always offers FREE estimates on your equipment replacement.
100% Satisfaction Guaranteed. Backed by Our One Year Test Drive.
Welzig's Service Area
View The Cities We Service
  • $99 Boiler Tune and Clean

    With Infrared Camera Inspection (Reg. $159)

    Cannot be combined with other offers. Call for full details.

  • $89 Furnace Tune and Clean

    With Water Heater Flush and Infrared Camera Inspection (Reg. $179)

    Cannot be combined with other offers. Call for full details.

  • $39 Trip & Diagnostic Fee

    $39 trip charge with repair (regularly $74)

    Cannot be combined with other offers. Call for full details.

    Expires: TBD

Air Conditioning Repair, Heating Installation, HVAC Company & Furnace ServiceLouisville, CO, Lafayette, CO, Longmont, CO & Boulder, CO

At Welzig Heating & Air, we focus on quality.  Recognizing that a cut corner today results in long-term problems and expense, we adhere to strict procedures for service and installation, and recommend only premier products.  While we provide affordable solutions to indoor comfort, we refuse to compromise integrity with subpar equipment, materials, or workmanship.  If you’re looking for residential or commercial heating, cooling, air quality, or water heating services of a higher caliber, Welzig Heating & Air delivers satisfaction across Boulder, CO & Surrounding Areas.  Contact us at 303-678-5576 anytime you need us.  Our dedicated technicians are on-call, ready to handle any challenge, 24 hours a day, 365 days a year.

Call 303-678-5576 Today!
bryant hvac systems
Heating

Ensure that your furnace is ready for the cold months.

Heating Repairs & Service

Whether you’re confronted with a minor maintenance issue, safety concern, or system failure, don’t hesitate to call 303-678-5576 for expert assistance. 24/7 Emergency Service allows you to get the help you need, whenever you need it. For all repairs, we prioritize your best interests, providing the information, cost-effective recommendations, and honest answers that add up to greater value for your investment. Our experienced HVAC specialists are familiar with all makes and models, and focus on repairs that enhance the reliability and performance of your equipment. When the job is complete, rest assured there will be no mess, damage, or discarded debris for you to deal with, and your furnace will be ready to meet demand. At Welzig Heating & Air, we build on a reputation for excellence each time we answer a call for repair across Boulder, Longmont, Louisville, Lafayette, CO & more.
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Cooling

Stay cool when the hot summer rolls in.

Air Conditioning Repair & Service

Welzig Heating & Air is on call, 24 hours a day, 365 days, making sure that the skilled assistance you need is always available.   There’s no need to struggle with decreased performance from your air conditioner.   Even small aggravations, such as elevated sound levels, strange smells, or longer running times, are warning signs of larger issues and usually add up to higher running costs.   When you trust your cooling equipment to Welzig Heating & Air, we work to not only resolve pressing issues. but ensure reliability, efficiency, and longevity.   A thorough inspection often protects against degraded air quality, property damage, and premature system failure.   We work on all makes and models of air conditioners, and with every repair we tackle, our team of dedicated technicians earn your satisfaction.   Through exemplary customer service, ethical business practices, and exacting standards, Welzig Heating & Air provides superior solutions to homeowners across Boulder, Longmont, Louisville, Lafayette, CO & more.
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About Us

Why choose Welzig? We'll tell you.
About Us
Since 1994, Welzig Heating & Air has been providing professional air quality solutions throughout Boulder, Longmont, Louisville, Lafayette, CO & more. We specialize in industry leading products and employ skilled and knowledgeable technicians to do the job right the first time. As a family owned company, we understand how important the quality of your indoor environment can be on your health, comfort, and productivity. When you call the team from Welzig Heating & Air, you’ll enjoy helpful recommendations, convenient appointment times, and rewarding installation service that leaves you feeling refreshed.
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Bryant HVAC

Installing the best, servicing any of the rest.
Bryant HVAC
Bryant has been an industry leader of heating and cooling products for over a century. Innovative Bryant HVAC systems provide dependable solutions to home and commercial comfort and air quality. With everything from heat pumps to gas furnaces and air conditioning systems, Bryant has the products that offer leading-edge technology and precision engineering. Call us today to learn more!
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Financing

We have several options available for you!
Financing
With flexible financing options from Wells Fargo Financial National Bank, with approved credit, you can enjoy many benefits. From convenient monthly payments to easy-to-use online account management, Wells Fargo financing offers top notch service and control over your finances. We know you want to stay comfort without breaking the bank, so we help you manage your expenses. Call us at 303-678-5576 to learn more!
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Special Offers

Save on your home comfort needs.
Special Offers
[coupon] We know you don’t want to spend an arm and a leg on your HVAC systems, which is why we offer convenient special offers for you to take advantage of. We strive to provide the best service at affordable prices so you can feel comfortable without feeling overwhelmed. Give us a call or visit our specials page to get your savings today.
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Professional Heating & Cooling Services

Bryant HVAC LogoAs a Bryant Factory Authorized Dealer, Welzig Heating & Air consistently performs to strenuous standards of technical competence, business ethics, and customer approval.  Our team is NATE-certified, factory trained and regularly updated in progressive technology.  Equipped with leading edge equipment, tools, and a full inventory of genuine manufacturer’s replacement parts, we properly size and install new systems, accurately diagnose existing systems, and resolve the majority of issues right then and there.

Call Welzig Heating & Air for accurate HVAC repairs, service, and installations!

By combining immediate results with sustainable performance, we protect the value of your investment.  We provide skilled installation, maintenance, and repair of gas furnaces, heat pumps, dual fuel systems, boilers, air conditioners, air quality products, traditional and tankless water heaters, and advanced duct cleaning services.  Welzig Heating & Air is the right choice for  the comfort, safety, and health of homes or offices across Boulder, Longmont, Louisville, Lafayette, CO & more.

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HVAC Company ∴ Air Conditioning Repair ∴ Furnace Service

Welzig Heating & Air
March 15, 2016
2018/11/18
  • Free 2nd Opinion

    Free 2nd opinion on all repairs/replacements/estimates

    Cannot be combined with other offers. Call for full details. Must present receipt from previous invoice

  • 10% Off

    10% off Allergen Reducing Filtration Systems and Accessories.

    Cannot be combined with other offers. Call for full details.

  • $20 Off Accessories

    When you download the Welzig App

    Can be combined with other offers.

    Expires: 10/30/2018

HVAC Services Throughout Colorado

We proudly service all those in the Boulder, CO & Surrounding Areas. Call today to improve your home comfort.

View Our Service Area
Our Clients Love Us
  • "Casey, I am glad I chose your company to help with my air conditioner problem. I was a bit surprised when your workers discovered that the old duct-work was only four inches in diameter, actually, I was more depressed and concerned about how this would affect the entire job..."
    Bob
  • "Weston called me before arriving and was on time. He was not only professional but knowledgeable. He found my problem and listened to my concerns. I will refer Weston and Welzig Heating to my family and friends..."
    Celine
  • "Collin was great! He resurrected our very old air conditioner when we thought we would be staring down the hole of a large bill to replace it.He was so knowledgeable and honest. A very respectful young man. We are so glad we called Welzig!"
    Trina

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We Service All Brands
Send us a Message Today!
Services
  • Air Conditioning Installation
  • Heating Installation
  • Heat Pumps & Dual Fuel
  • Duct Cleaning
  • Ductless HVAC
  • Indoor Air Quality
  • Boilers
  • Tankless Water Heaters
Why Choose Welzig?
  • Emergency Services
  • Maintenance Plans
  • Reviews
  • FAQ
  • Financing
  • Specials
  • Contact

Welzig Heating & Air
1831 Boston Ave. #D
Longmont, CO 80501
303-678-5576
303-678-5576
© 2018 Welzig Heating and Air
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