What Xcel Energy Rebates Cover for Insulation and Air Sealing
If your home is heated by Xcel Energy—whether on natural gas or electric service—you may qualify for rebates on three specific upgrades: attic insulation, wall insulation, and air sealing. These are not grants or guaranteed credits; they are performance-based rebates paid after a qualifying installation is completed and verified by an Xcel Energy participating contractor.
Insulation Nation is a participating contractor in the Xcel Energy program and serves the six-county Denver Metro area, including Denver, Jefferson, Arapahoe, Adams, Douglas, and Broomfield counties. We handle rebate paperwork in-house so you are not left navigating the application process on your own.
Rebate rules and amounts change periodically. Everything in this guide reflects published program information at the time of writing. Insulation Nation verifies current eligibility with Xcel Energy before every job, so you will always get accurate numbers before work begins.
Which Customers Qualify
Xcel Energy splits rebate eligibility into two tiers based on how your home is heated:
- Tier 1 – Gas or electric heat through Xcel Energy: This is the primary rebate tier with the highest dollar amounts. Most Colorado Front Range homeowners who use Xcel for both gas and electric service fall here. If your monthly bill comes from Xcel for both utilities, you almost certainly fall in this tier.
- Tier 2 – Xcel electric service with central AC, but non-Xcel heating: A smaller rebate tier for customers who have Xcel electric but heat with propane, oil, or another provider. Amounts are significantly lower and may not offset the administrative effort of the application for smaller projects.
Single-family homes, duplexes, and four-plexes are eligible. Larger multi-family buildings are handled under separate commercial programs. Renters generally do not qualify because rebates go to the account holder responsible for the utility bill, and the utility account for a rental unit is often in the landlord’s name. If you are unsure which tier applies to your home, contact Insulation Nation and we will look it up before scheduling anything. It only takes a minute to verify with your Xcel account information.
Current Rebate Amounts by Measure
The table below reflects the published 2024 Xcel Energy Colorado Residential Rebate Summary. Amounts are subject to change; contact us to confirm current figures before committing to a project.
| Measure | Minimum Qualifying Standard | Max Rebate |
|---|---|---|
| Air Sealing | 20% reduction in CFM50 (blower door tested) | $200 |
| Wall Insulation | Pre-job empty wall cavity; post-job R-13 or greater | $350 |
| Attic Insulation | Pre-job R-value below 15; post-job R-49 or greater | $400 |
| Measure | Minimum Qualifying Standard | Max Rebate |
|---|---|---|
| Air Sealing | 20% reduction in CFM50 | $15 |
| Wall Insulation | Pre-job empty wall cavity; post-job R-13 or greater | $25 |
| Attic Insulation | Pre-job R-value below 15; post-job R-49 or greater | $60 |
The gap between Tier 1 and Tier 2 is substantial, which is why confirming your heating source before planning a project matters.
Attic Insulation: Pay-for-Performance Details
Attic insulation under the Xcel program uses a pay-for-performance model rather than a flat per-project rate. The rebate per square foot of improved attic space depends on your starting R-value, the incremental R-value improvement, and the treated square footage. The cap is 60% of project cost, and the overall program maximum for attic insulation is $400 for Tier 1 customers.
In practical terms: a home starting at R-9 sees a higher rebate-per-square-foot than one starting at R-25, because the energy savings are proportionally larger. Homes that are already partially insulated still qualify if the starting R-value is below 15, but the per-square-foot rate will be lower than for an uninsulated attic.
A proper pre-job assessment—which Insulation Nation conducts before every attic project—documents your current R-value and attic square footage so the rebate calculation is accurate from the start. Learn more about our attic insulation services.
Air Sealing and Why It Often Comes First
Air sealing is frequently the highest-impact measure per dollar spent in older Colorado homes. Gaps around plumbing penetrations, electrical boxes, attic hatches, and recessed lights allow conditioned air to escape year-round. Xcel’s rebate requires a verified 20% reduction in CFM50—a measurement from a calibrated blower door test performed before and after the work.
CFM50 stands for cubic feet per minute of airflow at 50 pascals of pressure. The blower door depressurizes your home and measures how much air leaks through the building envelope. A 20% reduction means the post-job measurement must be at least one-fifth lower than the pre-job baseline. In Denver Metro homes built before the mid-1990s, achieving a 20% reduction is typically not difficult because there are so many unsealed penetrations. Tighter newer homes may already be close to code minimums, making the 20% reduction harder to hit.
Beyond the rebate, air sealing pairs directly with attic insulation. Adding insulation over unsealed gaps is less effective; the stack effect will continue to pull warm air upward through any opening. Insulation Nation performs both air sealing and insulation, which means we sequence the work correctly and document the blower door results for your rebate application.
Visit our attic insulation page to see how we approach combined projects, or check our FAQ for common questions about blower door testing and what to expect on installation day.
Bonus Rebate Opportunities
Xcel Energy offers two stacking bonus structures that can meaningfully increase total rebate value for homeowners planning broader upgrades:
Heat Pump Combo Bonus: Up to $600
If you install a qualifying Xcel rebate-eligible space-heating heat pump and then add qualifying insulation or air sealing within six months (based on invoice dates), Xcel will pay an additional $600 bonus. The insulation and air sealing must qualify under standard program rules first. This bonus is specifically tied to the combination and timing of the two project types.
Whole Home Efficiency Bonus: 25% Additional Rebate
If you complete three or more qualifying measures within a two-year window, Xcel pays an additional 25% on top of all the rebates already paid for each qualifying measure. This requires starting with a blower door audit, infrared audit, or a Home Energy Squad Plus visit, and all rebates must be applied through the Whole Home Efficiency application pathway rather than standard standalone applications. Insulation Nation can advise whether your planned scope of work qualifies for this program track.
Home Energy Audit Rebates
Xcel also rebates a portion of diagnostic audit costs, which are typically required before or alongside qualifying insulation work:
- Standard audit: up to $100 (60% of cost)
- Blower door audit: up to $160 (60% of cost)
- Infrared audit: up to $200 (60% of cost)
These audit rebates are separate from the insulation rebates and can stack with them. If you are starting the Whole Home Efficiency program, you must begin with a qualifying audit.
Why You Must Use a Participating Contractor
Xcel Energy requires that insulation and air sealing upgrades be completed by a participating contractor to qualify for rebates. This is not a technicality you can work around—DIY work or non-participating contractors are not eligible. Xcel maintains a list of registered contractors at xcelenergy.com/COTrades.
Insulation Nation is a participating contractor. We are familiar with the documentation requirements—pre- and post-job R-value measurements, blower door test reports, square footage records—and we submit the paperwork on your behalf. You do not need to create a customer portal account, track down forms, or follow up on application status. We handle it.
Find the full list of registered Xcel participating contractors at xcelenergy.com/COTrades. Insulation Nation appears on that list and serves the six-county Denver Metro area.
How to Get Started
The process is straightforward. We assess your home, confirm current Xcel rebate eligibility, quote the job including the expected rebate offset, complete the work, and file the paperwork.
- Request a free quote at /free-quote/ or call us at (720) 410-9414.
- We conduct a pre-job assessment to document your current R-values and blower door baseline.
- We complete the insulation and/or air sealing work.
- We submit the Xcel rebate application with all required documentation.
- Xcel processes and issues the rebate directly to you.
Rebate processing timelines are set by Xcel Energy, not by Insulation Nation. We give you realistic expectations upfront.
Ready to find out what your home qualifies for?
Call Insulation Nation at (720) 410-9414 or request a free quote online. We serve the six-county Denver Metro and Colorado Front Range. No obligation, no sales pressure—just accurate numbers.
Also see our Colorado energy rebates overview for a broader look at available programs.
Frequently Asked Questions
Do I need to get an energy audit before claiming an insulation rebate?
Not always. A pre-job inspection to document current R-values is required, but a formal paid audit is not mandatory for standalone attic or wall insulation rebates. However, if you want to participate in the Whole Home Efficiency bonus program—which adds 25% to all your rebates if you complete three qualifying measures in two years—you must start with a qualifying audit such as a blower door or infrared audit. Insulation Nation will walk you through which path makes sense for your project.
Can I combine the air sealing rebate with the attic insulation rebate in the same project?
Yes. Air sealing and attic insulation are separate line items with separate rebate caps ($200 and $400 respectively for Tier 1 customers), and they can be completed in the same project. In fact, doing both in one visit is usually the most cost-effective approach, and it positions you for the Whole Home Efficiency bonus if you plan additional qualifying measures later.
What if my attic already has some insulation—will I still qualify?
Possibly. Xcel requires a pre-job R-value of less than 15 and a post-job R-value of R-49 or greater. If your existing attic insulation is already at or above R-15, the standard attic rebate does not apply. If it is below that threshold, you likely qualify—but the pay-for-performance rate per square foot will vary based on your specific starting point. We measure before we quote.
How long does Xcel take to pay the rebate after the work is done?
Processing timelines are controlled by Xcel Energy and are not set by Insulation Nation. Generally, customers receive rebates within several weeks of a complete application submission. We submit your application as soon as the job is complete and documented. If there are questions from Xcel during review, we respond on your behalf.
What happens if Xcel changes the rebate amounts between when I get my quote and when the job is done?
Rebate programs can change during the program year. Insulation Nation confirms current Xcel rebate eligibility before every job starts, and we will flag any changes that affect your expected rebate before we schedule installation. We do not quote rebate amounts that we have not verified with current program documentation.