Boulder County
Louisville
Clean installs and clear scopes for Louisville homeowners.
Louisville is known for having some of the highest standards for residential construction and mechanical work in Boulder County. From strict contractor licensing requirements to additional testing and efficiency rules, HVAC projects in Louisville require careful planning and code-compliant execution.
KJT Mechanical provides residential and light commercial HVAC services throughout Louisville. We are properly licensed to work in Louisville and experienced with the city’s unique permitting, testing, and efficiency requirements.
Residential HVAC Services in Louisville
Louisville homes include a wide mix of older houses, remodeled properties, and newer construction. Each comes with different mechanical challenges, and we take the time to understand the home before recommending solutions.
Our residential HVAC services include:
- Furnace repair, maintenance, and replacement
- Air conditioning repair and installation
- Heat pump installation and system upgrades
- Boiler service and replacement
- System diagnostics and troubleshooting
- Seasonal tune ups and safety inspections
Our focus is safe operation, long-term reliability, and systems that are properly sized and installed to meet local code.
Louisville’s Strict Contractor Licensing Requirements
Louisville has some of the most demanding contractor licensing standards in the region. Contractors performing HVAC work in the city must demonstrate technical competency, including passing recognized mechanical exams such as the ICC G29 or ICC G31.
These licensing requirements help ensure:
- Proper system design and installation
- Compliance with mechanical and fuel gas codes
- Higher safety and workmanship standards
We maintain the required licenses to legally perform permitted HVAC work in Louisville and stay current with local code expectations.
Required High-Efficiency Furnaces in Louisville
Since 2024, Louisville has required that new gas furnaces installed in the city be 90% efficient or higher.
This means:
- Standard 80% efficient furnaces are no longer permitted for new installations
- High-efficiency, sealed-combustion furnaces are required
- Venting design and condensate management are critical
These requirements improve efficiency and safety but can impact system selection, installation cost, and project complexity. We make sure homeowners understand these requirements upfront so there are no surprises.
Pressurized Flue Testing for Louisville HVAC Installations
Another unique requirement in Louisville is pressurized flue testing for certain gas-fired appliance installations. This test verifies that the venting system is properly sealed and safe under pressure, helping prevent exhaust gases from leaking into the home.
For applicable installations, we:
- Perform pressurized flue testing as required by the city
- Verify venting integrity before inspection
- Address venting issues proactively to reduce inspection problems
This extra step adds time and attention to detail, but it significantly improves safety and helps installations pass inspection smoothly.
Permits and Inspections in Louisville
HVAC projects in Louisville require permits and city inspections, and the city is known for thorough enforcement of mechanical and fuel gas codes.
Our role is to:
- Install systems that meet Louisville’s code requirements
- Perform required testing, including pressurized flue testing when applicable
- Ensure work is completed correctly before inspection
By addressing these requirements upfront, we help minimize delays and unexpected issues.
Heat Pumps and High-Efficiency Systems in Louisville
Many Louisville homeowners are interested in improving comfort and reducing energy use. Heat pumps and high-efficiency hybrid systems can be excellent options when properly designed.
We help homeowners evaluate:
- Whether a heat pump is a good fit for their home
- Cold-climate performance expectations
- Backup heat options and system design
- Long-term operating costs and efficiency benefits
If a traditional system is the better choice, we explain why and outline realistic alternatives.
HVAC Safety Inspections and System Evaluations
Not every HVAC issue requires immediate replacement. Uneven temperatures, short cycling, unusual noises, or rising energy bills are all reasons to have a system evaluated.
Our evaluations focus on:
- Safe system operation
- Equipment condition and remaining lifespan
- Efficiency and comfort concerns
- Clear, written recommendations
If a system can continue operating safely, we will say so.
Why Louisville Homeowners Choose KJT Mechanical
- Properly licensed to work in Louisville
- Experience with strict code and efficiency requirements
- Familiarity with pressurized flue testing
- Clear communication and realistic recommendations
- Licensed, insured, and professional technicians
We believe Louisville homeowners deserve HVAC work that meets both city standards and their own expectations.
Schedule HVAC Service in Louisville
If you are looking for licensed, code-compliant HVAC service in Louisville, we would be happy to help.
Call or text us to schedule service, request an estimate, or ask questions about your heating and cooling system. We are always glad to explain options, requirements, and next steps before work begins.
Helpful links
Project gallery
A quick look at recent work and local homes we have helped in Louisville.
Service area FAQ
Why are Louisville’s HVAC requirements stricter than nearby cities?
Louisville has adopted higher standards for contractor licensing, energy efficiency, and safety. These requirements are intended to improve installation quality, reduce safety risks, and ensure systems operate efficiently over the long term. As a result, not all HVAC contractors are licensed or qualified to work in Louisville.
Do HVAC contractors really need special licenses to work in Louisville?
Yes. To perform HVAC work in Louisville, contractors must meet the city’s licensing requirements, which include passing recognized mechanical exams such as the ICC G29 or ICC G31. This helps ensure contractors understand mechanical and fuel gas codes and are qualified to perform permitted work.
Why does Louisville require 90% or higher efficiency gas furnaces?
Since 2024, Louisville has required new gas furnaces to be at least 90% efficient. High-efficiency furnaces use sealed combustion and condensing technology, which improves energy efficiency and reduces exhaust and combustion air concerns compared to older 80% efficient models.
Can I still replace an older 80% efficient furnace in Louisville?
If a furnace is being replaced, the new furnace must meet current city requirements, which means installing a 90% or higher efficiency model. This can affect venting, condensate drainage, and installation details, all of which need to be planned correctly.
What is pressurized flue testing and why is it required?
Pressurized flue testing checks the integrity of the venting system by verifying that it is properly sealed under pressure. Louisville requires this testing for certain gas appliance installations to help prevent exhaust gases from leaking into the home and to improve overall safety.
Does pressurized flue testing add time or cost to a project?
It can. Pressurized flue testing requires additional setup and verification during installation. While it adds some time and cost, it helps avoid inspection failures and improves long-term safety and reliability.
Do all HVAC companies perform pressurized flue testing?
No. Not all contractors are equipped or experienced with pressurized flue testing, which is one reason some companies avoid working in Louisville. Working with a contractor familiar with Louisville’s requirements helps prevent delays and failed inspections.
Are heat pumps allowed in Louisville?
Yes. Heat pumps are allowed and can be a good option for many homes when properly designed. We help homeowners evaluate whether an all-electric or hybrid system makes sense based on comfort goals, existing equipment, and long-term operating costs.
How do I know if my project will need special testing or upgrades?
Requirements depend on the type of equipment being installed and the existing venting and mechanical setup. We review these details during the planning process and explain what is required before work begins so there are no surprises.
Plan your Louisville project
We will confirm goals, walk through options, and build a clean scope for your home.