If you’ve been considering a furnace upgrade or your current system is showing signs of wear, it’s time to act. Starting January 1, 2026, new statewide regulations in Colorado will change which gas furnaces can be installed in residential homes. These changes are designed to reduce pollution—but for homeowners, they may mean limited equipment availability, higher costs, and fewer installation options.
At Van Genderen Heating & Air Conditioning, we want to help you stay ahead of these changes so you’re not left scrambling in 2026.
What Are the New Furnace Rules in Colorado?
Under House Bill 23-1161, all newly installed gas-fired, fan-type central furnaces in Colorado must meet strict ultra-low NOₓ (nitrogen oxide) emissions standards.
Key Requirements Starting January 1, 2026:
- Only Ultra-Low NOₓ (ULN) furnaces emitting ≤14 nanograms per joule (ng/J) will be allowed
- Furnaces must meet 95% or higher Annual Fuel Utilization Efficiency (AFUE)
- Systems must be ENERGY STAR® rated
- Non-compliant systems cannot be sold or installed after December 31, 2025
These updates support Colorado’s broader push for cleaner air and reduced residential emissions.
What does this mean for Homeowners?
1. Higher Equipment Costs
ULN-certified furnaces use advanced combustion technology. That innovation comes at a price—new systems are expected to cost 2.5 to 3 times more than standard models.
2. Limited Inventory
Many popular models won’t meet the 2026 standards. Inventory of older models is expected to be phased out well before the deadline, reducing choices for homeowners seeking replacements.
3. Installation Backlogs
As the deadline approaches, demand will surge. Homeowners waiting until late 2025 may face long scheduling delays or limited technician availability.
4. Long-Term Savings
Despite the higher upfront cost, ULN furnaces offer significant energy savings over time. With 95%+ efficiency, they reduce monthly heating costs and may qualify for rebates or financing options.
Why You Should Act Now?
If your furnace is:
- 15+ years old
- Breaking down frequently
- Driving up your energy bills
- Struggling to heat your home evenly
…it’s a smart move to replace it now, before the regulations take effect. Not only will you lock in a more affordable system, but you’ll also avoid the rush and ensure availability.
At Van Genderen Heating & Air Conditioning, we’re currently installing pre-2026 high-efficiency furnaces across the Denver Metro area—including Centennial, Lone Tree, Castle Rock, Parker, Highlands Ranch, and surrounding communities.
Our Furnace Services Include:
- Expert installation of Bryant high-efficiency systems
- Complete furnace repair and maintenance
- Honest, no-pressure recommendations
- Help navigating rebates and energy incentives
Don’t Wait—Schedule Your Furnace Consultation Today
Colorado’s new furnace rules are coming fast. Don’t get caught in the 2026 rush.
Whether you’re planning an upgrade or just want to explore your options, Van Genderen Heating & Air Conditioning is here to help. Our experienced team will assess your current system, explain your options, and ensure you’re prepared—without the pressure. Call us today at (303) 744-2776 or schedule your free quote online.
Frequently Asked Questions:
1. Do I have to replace my furnace by 2026?
No. Existing furnaces can continue to operate. However, if you need a replacement after January 1, 2026, it must meet ULN and 95% AFUE requirements.
2. What is NOₓ and why is it regulated?
Nitrogen oxides (NOₓ) are pollutants released during gas combustion. They contribute to smog and poor indoor air quality, which can affect respiratory health. Colorado’s rules aim to reduce this pollution.
3. Can I still install a standard furnace in 2025?
Yes, but only while inventory lasts. Manufacturers are expected to stop producing non-compliant models before 2026, so supply may dwindle by late 2025.
4. Will new ULN furnaces cost more?
Yes. The combination of stricter emissions standards and advanced energy-efficient technology means new systems will likely cost significantly more than current models.
5. Are rebates or financing options available?
Absolutely. At Van Genderen, we help customers take advantage of local rebates and offer financing options on qualifying high-efficiency furnace installations.
Van Genderen Heating & Air Conditioning has proudly served Colorado homeowners for over 75 years. We’re your trusted local source for expert furnace repair, replacement, and education on changing regulations.
Call (303) 744-2776 today to avoid the 2026 rush and get the right system—on your schedule and within your budget.
