Xcel's Mountain Energy Project: what mountain homeowners can get

If you have Xcel natural gas service in one of eight Colorado mountain towns, the Mountain Energy Project pays up to $7,500 per heating ton for a cold-climate heat pump, up to $20,000 per heating ton for ground source, and up to $4,000 for a heat pump water heater. The largest amounts go to homeowners who replace equipment that still works, rather than waiting for it to fail.

That inverts the advice most people have heard about heating equipment. Here's which towns qualify, what each measure pays, and the sizing detail that decides what your rebate actually comes to.

Key takeaways

• The Mountain Energy Project is Xcel's non-pipeline alternative for the Eastern Mountain Gas System in Grand, Lake, Eagle, and Summit counties. The Colorado PUC approved it in November 2025.

• Eligibility runs by town and zip code, not by county: Breckenridge 80424, Dillon 80435, Frisco 80443, Grand Lake 80447, Leadville 80461, Silverthorne 80497 and 80498, and Red Cliff 81649.

• Replacing working equipment that's 10 years old or less pays roughly 88% more than replacing it after it dies. On a cold-climate heat pump that's $7,500 per heating ton against $4,000.

• Rebates are calculated per heating ton at 5°F from the certified rating, not per nominal ton on the nameplate. That distinction moves the total by thousands.

• It's the only Xcel program in Colorado with a cold-climate air-to-water heat pump line, which is what a boiler or radiant-floor home actually needs.

• If you already heat with electric resistance, you're excluded from these rebates and fall back to Xcel's standard statewide rebates.

What is the Mountain Energy Project?

It's Xcel's plan for the Eastern Mountain Gas System, the gas network serving Grand, Lake, Eagle, and Summit counties. Demand in those growing mountain towns is outrunning the existing system, and rather than solving that entirely with new pipe, Xcel is running a mix: gas supply reinforcements for winter peaks, including modular liquefied natural gas near Breckenridge and compressed natural gas near Keystone, alongside non-pipeline alternatives that reduce how much gas the system has to deliver in the first place.

The non-pipeline half is where the rebates live. Xcel reached a near-unanimous settlement in August 2025 with the PUC staff, the Colorado Energy Office, the Mountain Community Coalition, the Sierra Club, and the Southwest Energy Efficiency Project. The Commission issued final written approval in November 2025 and found the project necessary and in the public interest. Rebates apply to work invoiced on or after December 15, 2025.

The practical translation: Xcel is buying a reduction in mountain-town winter gas demand, and your upgrade is the thing being bought. That's why the amounts are structured the way they are, and why they reward acting early.

Which towns and zip codes qualify?

Eligibility is by specific town and zip code, and the list is narrower than the four-county footprint of the wider project. You need an active residential natural gas account from Xcel Energy at a property in one of these:

You can be a gas-only customer or a customer with both gas and electric service from Xcel. If you're in Vail, Avon, Keystone, Winter Park, or anywhere else inside the four counties that isn't on this list, the Mountain Energy Project rebates don't apply and Xcel's standard statewide programs do.

What does the Mountain Energy Project pay?

Three columns, and which one you land in is the most consequential thing on this page. "Early replacement" means the equipment you're replacing is 10 years old or less and still working. "Non-early replacement" means it failed, or it's older than that.

Weatherization and audits are separate, and they're the measures most people skip:

Why does replacing early pay almost twice as much?

Because Xcel isn't buying equipment efficiency. It's buying a reduction in peak winter gas demand, and it can only count that reduction if the change happens on Xcel's schedule rather than on your boiler's.

If your furnace dies in January and you replace it, the gas savings show up whenever they show up. If you replace a working 8-year-old furnace this fall, Xcel gets a known reduction before the peak it's planning around. The early-replacement premium, $7,500 per heating ton against $4,000, is the price of certainty.

The homeowner consequence is uncomfortable but simple: the standard advice to run heating equipment until it dies costs you money in these eight towns. A working system at year 9 is worth substantially more to replace than the same system at year 12, and if it fails at year 11 you've moved into the lower column by accident.

The sizing detail that decides your number

Read the unit carefully. It's dollars per heating ton at 5°F, not per nominal ton on the nameplate.

Those are different numbers. A nominal 3-ton cold-climate heat pump does not deliver 3 tons of heating capacity at 5 degrees. It typically delivers meaningfully less, and the rebate is calculated on the certified rating at 5°F rather than on the size of the box. Xcel requires the equipment to be listed on AHRI or energystar.gov, which is where that rating comes from.

This is where quotes go wrong. A contractor who quotes your rebate off nominal tonnage will produce a number you don't receive. A design that sizes the system properly for the heat load at your actual design temperature, then reads the rebate off the certified 5°F output, produces a number that survives Xcel's review. In Leadville, where the design temperature sits well below 5°F, the gap between those two approaches is not small.

The qualifying specification is worth reading too. A ducted cold-climate unit has to hit 15.2 SEER2, 10 EER2, and 8.1 HSPF2, hold a COP of at least 1.75 at 5°F, meaning 1.75 units of heat per unit of electricity at 5 degrees, and retain at least 70% of its 47°F heating capacity down at 5°F. Those last two lines are how cold-climate heat pumps hold capacity in low temperatures, and they're the reason a qualifying system carries a Breckenridge January.

What about boiler and radiant-floor homes?

This is the part of the program that most coverage misses, and it matters more in the mountains than anywhere else in Colorado.

Mountain housing stock is disproportionately hydronic: boilers, baseboard, radiant floors. A conventional air-source heat pump blows warm air, which is the wrong output for a house with no ductwork and pipes in the floor. Neither a ducted system nor a ductless mini-split is the natural fit. The equipment that is, is a cold-climate air-to-water heat pump, which makes hot water instead of hot air and feeds the distribution system you already have.

The Mountain Energy Project is the only Xcel rebate in Colorado with a dedicated cold-climate air-to-water line: $4,900 per heating ton at 5°F on early replacement, $4,200 on failure replacement. Two conditions attach. The equipment has to deliver a COP of at least 1.7 at 5°F outdoor air with a 110°F leaving water temperature at design, and projects installed or invoiced before April 9, 2026 are not eligible for the air-to-water rebate specifically, unlike the rest of the program's December 15, 2025 start.

The 110°F leaving-water requirement is the design constraint that decides whether this works in your house. Old cast-iron baseboard sized for 180°F water will not put out enough heat at 110°F. Radiant floors, panel radiators, and generously sized baseboard usually will. That's an engineering question about your specific distribution system, not a product question, and it's the one to settle before anyone orders equipment.

What we see in mountain homes

Two patterns from our Summit County work.

The first is the hydronic mismatch above. Homeowners ask for a heat pump, get quoted a ducted system, and discover there's nowhere to put ducts in a house with radiant floors. The right answer is usually air-to-water, and until this program existed there was no utility money behind it in Colorado.

The second is the second-home problem. A large share of the housing in these zip codes isn't occupied year-round, which changes the calculation in both directions. Setback behavior is different, freeze protection matters more, and the early-replacement rebate is attractive precisely because a working system in a house you visit six weekends a year is easy to leave alone for another five years. That's five years of the higher rebate column left on the table.

What the Mountain Energy Project won't do

It won't cover you if you already heat with electricity. Xcel's terms exclude customers with existing electric heating systems, naming electric resistance baseboard specifically, from the heat pump and heat pump water heater rebates. Those customers remain eligible for Xcel's standard rebates, which are much smaller. For a mountain condo on electric baseboard, this is the whole answer, and it's disappointing.

It requires removing the gas equipment the heat pump replaces. You and your contractor must certify full removal of any existing natural gas equipment where the new system now heats the same space or serves the same purpose. Keeping the boiler as a cold-weather backup disqualifies that measure.

Rebates can't exceed your actual cost. Combined rebates from all parties, including state programs, local government, and nonprofits, are capped at the real equipment and labor cost of the project. Labor only counts when an independent third-party contractor qualified to work in the jurisdiction performs it, so self-performed and in-house labor is excluded.

Funding is limited and first come, first served. Xcel asks customers to verify the program is still active and funded before completing a project.

A heat pump alone won't fix a leaky mountain house. At Leadville's design temperature, shell performance dominates. The program pays for air sealing and insulation for a reason.

Frequently asked questions

Who qualifies for Mountain Energy Project rebates?

Homeowners with an active residential natural gas account from Xcel Energy in Breckenridge 80424, Dillon 80435, Frisco 80443, Grand Lake 80447, Leadville 80461, Silverthorne 80497 or 80498, or Red Cliff 81649. Customers who already heat with electric resistance are excluded from the heat pump rebates.

How much does the Xcel Mountain Energy Project pay for a heat pump?

Up to $7,500 per heating ton at 5°F for a cold-climate air source heat pump on early replacement, meaning the equipment you're replacing is 10 years old or less and still working. Failure or non-early replacement pays $4,000 per heating ton. Ground source pays up to $20,000 per heating ton.

Does the Mountain Energy Project cover air-to-water heat pumps?

Yes, and it's the only Xcel program in Colorado that does. A cold-climate air-to-water heat pump pays $4,900 per heating ton at 5°F on early replacement. The equipment needs a COP of at least 1.7 at 5°F with 110°F leaving water, and projects invoiced before April 9, 2026 don't qualify for this line.

When did Mountain Energy Project rebates start?

Invoices must be dated on or after December 15, 2025, following the Colorado PUC's final written approval in November 2025. The air-to-water line is the exception: projects installed or invoiced before April 9, 2026 aren't eligible for it. There's no published end date, but funding is limited.

Should I replace my furnace before it breaks?

In these eight zip codes the rebate structure says yes. Early replacement of working equipment 10 years old or less pays roughly 88% more than replacing the same equipment after it fails. That's the opposite of the usual advice, and it's specific to this program.

Sources

• Xcel Energy, Mountain Energy Project Rebates

• Xcel Energy, Mountain Energy Project 2025 to 2026 Residential Rebate Summary, effective December 15, 2025

• Xcel Energy, Mountain Energy Project filings and PUC approval, Proceeding No. 25A-0044EG

Find out which column your house is in. We check your zip code, look at what you're actually heating with, and design the system your distribution can carry, ducted or hydronic. See the full Mountain Energy Project rebates and eligibility page.