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Heating Systems

Low NOx & Ultra-Low NOx Furnace and Water Heater Installation

As Colorado moves toward cleaner air standards, homeowners are beginning to see new requirements for heating systems and water heaters.

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Harmful Emissions, Handled.

Reduce harmful emissions while maintaining the same comfort and performance you expect.

Furnace and Water Heaters

What Are Low NOx and Ultra-Low NOx Systems?

As Colorado moves toward cleaner air standards, homeowners are beginning to see new requirements for heating systems and water heaters. Low NOx and Ultra-Low NOx (ULN) furnaces and water heaters are designed to reduce harmful emissions while maintaining the same comfort and performance you expect.
Reduce Harmfull Emissions

Furnace & Water Heaters

Repair or Replace—Honest Guidance

Clean, Respectful In-Home Service

Serving Denver & Boulder Metro Homes

What Are Low NOx and Ultra-Low NOx Systems?

NOx (nitrogen oxides) are pollutants created during combustion and are a major contributor to smog and poor air quality. Low NOx and Ultra-Low NOx systems are specifically engineered to reduce these emissions significantly compared to traditional equipment.

  • Low NOx systems typically emit up to 40 ng/J
  • Ultra-Low NOx systems meet stricter standards of 14 ng/J or less

These systems can reduce emissions by 65–75% compared to standard units These upgrades are not just about compliance—they’re part of a broader shift toward cleaner, more efficient home systems across Colorad

Why Low NOx Systems Are Becoming Required in Colorado

Regulations that began in states like California and Utah are now expanding, with Colorado implementing stricter requirements starting in 2026 for new residential installations and system replacements. This means:
  • Many new furnace and water heater installs will require
  • Low NOx or ULN-rated equipment
  • Older systems may no longer meet compliance standards when replaced
  • Homeowners will need to plan ahead when upgrading heating systems

Working with a local expert ensures your system meets current and upcoming regulations without delays or costly mistakes.

How Low NOx Technology Works

Low NOx and ULN systems use advanced combustion technology to reduce emissions while maintaining performance. These systems often include:
  • Pre-mix burners that combine fuel and air before ignition
  • Two-stage or staged combustion for better control
  • Lower flame temperatures, which reduce nitrogen oxide formation

The result is cleaner combustion, improved efficiency, and reliable heating for your home.

Low NOx Furnaces

Low NOx furnaces are designed to heat your home efficiently while minimizing environmental impact.

What to Expect:

  • Meets 40 ng/J (Low NOx) or 14 ng/J (Ultra-Low NOx) standards
  • Uses specialized burners for cleaner operation
  • Delivers consistent, reliable heating performance

When to Consider a Low NOx Furnace:

  • Your current furnace is aging or failing
  • You’re upgrading to meet new Colorado regulations
  • You want a more energy-efficient, environmentally friendly system

Low NOx Water Heaters

Modern water heaters are also evolving to meet stricter emission standards without compromising hot water performance.

Options Available:

  • Tank (storage) water heaters
  • Tankless (on-demand) water heaters

Key Benefits:

  • Up to 75% reduction in emissions
  • High-efficiency performance
  • Compliance with 10–14 ng/J requirements in regulated areas

Whether you prefer a traditional tank or a tankless system, Low NOx options are available to fit your home and usage needs.

Repair vs. Replacement: What’s Right for You?

If your current system is still functioning, you may be wondering whether to repair or replace it.

Consider Replacement If:

  • Your system is nearing the end of its lifespan
  • Repairs are becoming frequent or costly
  • You want to proactively meet new Colorado standards

Consider Repair If:

  • Your system is relatively new
  • It still meets efficiency and compliance requirements
  • Issues are minor and cost-effective to fix

Our team can evaluate your system and help you make the best decision for your home and budget.

Testimonials

What Client Say

From minor drips to major disasters, we handle the dirty work so you don’t have to.

Let's Work Together

Great company. I have used them before and I will use them again! CO-PI Plumbing and Drain really went above and beyond to help me out. If you're in a jam with a plumbing problem, look no further. CO-PI Plumbing and Drain are the best. They put all my worries and stress at ease the minute they showed up to help me with my Plumbing emergency. Fast, Efficient and Friendly! True professionals. Thank you CO-PI Plumbing and Drain!

Jeff Customer

Arrived within 2 hours of my call. I had reported that the main line needed cleaned out, and that two sink drains were draining slow. Did a main line cleanout and that fixed the basement sink issue. The upstairs drain was still gurgling but he explained it was due to the accordion connection that had been used and that there was no back up. It would have been easy for them to tell me the sink drains needed scoped, but they didn't..I appreciate their honesty.

Beth Customer

Had a great experience with CO-PI, called them and they had someone out the day after Thanksgiving. Hub did a great job and was done in a timely manner. I’ll never use another company, highly recommended!! Thanks CO-PI

Lianna Customer

How We Work

What To Expect

No guesswork. No pressure. Just clear solutions.

System Evaluation

We inspect your water heater and plumbing connections.

Clear Options

Repair vs. replacement explained honestly.

Professional Service

Clean, efficient work inside your home.

Testing & Cleanup

We make sure everything works before we leave.

Are Low NOx systems required in Colorado?

Starting in 2026, many residential installations will require higher efficiency or Ultra-Low NOx systems, depending on local regulations.

Do these systems perform as well as standard units?

Yes. They are designed to deliver the same level of heating and hot water performance while reducing emissions.

Can I still repair my existing system?

In many cases, yes—but when replacement is needed, you may be required to upgrade to a Low NOx or ULN system.