When it’s time for HVAC, furnace, water heater and air conditioning repairs or installations in your Johnstown home, get in contract with Red Line Mechanical, LLC. Our team of experts have over 30 years of industry experience. We are a leading company in Northern Colorado when it comes to customer service, satisfaction and safety. We chose to work with leading product manufactures so we can make sure all our customers are receiving the best in Johnstown HVAC, furnace, water heater and air conditioning repair and installations. All our Red Line Mechanical¸ LLC technicians are required to keep up to date on industry standards, so we provide routine trainings regarding technology and updated equipment.

  • Johnstown Furnaces

    Johnstown Furnaces

    Furnaces – Red Line does annual maintenance visits and installation services for furnaces and more. We want to help you get your home ready for those Colorado winters. We also offer a complimentary filter service with any inspection or repair.

  • Johnstown Water Heaters

    Johnstown Water Heaters

    Water Heaters – When its time for a repair on your water heater, or you need a new one altogether, Red Line in Johnstown can help! We will make sure everything is running smoothly, and we provide a free quote with every request about services.

  • Johnstown Humidifiers

    Johnstown Humidifiers

    Humidifiers – Is it time for a new humidifier? We can help! Our team of experts can assist you with repairs and installations, and make sure your home is retaining the right amount of moisture all year long. We also provide a free filter service with any repair or maintenance visit.



Red Line Mechanical, LLC in Johnstown is a leading repair and installation company for HVAC, furnaces, water heaters and air conditioners. We believe in safety first, so when we can make our customers happy while keeping them safe, we count that as a huge win for us, and them!



We have been serving Johnstown for many years and are a trusted source for all types of HVAC installation and repair.


We only work with the highest rated manufacturers in the industry and guarantee all of our Redline Heating, furnace, and water heater service, repair, installation and replacement work.


We hold our Redline Technicians to the highest possible industry standards. We provide ongoing training for our techs to make sure they are up to date with the latest industry knowledge.


Redline Heating offers repair and replacement services for heating, AC systems, furnaces, water heaters, and more throughout Johnstown and Northern Colorado. We provide FREE quotes for all service types.


*Call today to find out about our warranty information.


We provide everything you need to repair or replace your HVAC system. We have the equipment, industry knowledge and trained technicians to get the job done right.


We have been repairing, installing, and replacing air Conditioners, furnaces, water heaters and humidifiers in the Johnstown area for over 30 years and we take pride in what we do.




  • I am a member of their service plan and pay $19/month for their ongoing routine inspections and service. As a member, the cost savings I get for almost any repairs or service is almost enough to cover the monthly fees. They come out every three month and spend at least an hour checking and servicing my furnace and air conditioner including replacing the air filter.

    Elliot A.
  • Heater broke on a Saturday and they saved the day! Being new to the area I had not needed this service before but I will defiantly be calling them again for all my needs. Their prompt and professional service was exceptional!! Really enjoyed doing business with them (especially the manager who did the service call) even though it was not a desire predicament. Highly recommended!!

    Richard P.
  • Friendly people and great service. Not a single bad experience in the last 4 years of business relationship.

    Dan S.
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