Get Your Xcel Energy Audit
Freezing in winter. Roasting in summer. Bills that keep climbing. An energy audit finds out why.
Uncover Hidden Energy Waste
Energy Audits Built for Colorado Homes
Colorado is hard on homes. Single-digit winters, 95-degree summers, and thin mountain air push older Denver houses to their limits, especially the 1950s bungalows in Park Hill and Wash Park.
Our BPI-certified analysts pinpoint where your home is leaking energy: blower door testing, infrared imaging, duct leakage checks, and combustion safety testing, all in one visit. Then the same team comes back to fix what we found, and tests again to prove the work paid off
REenergizeCO has been honored as a "Utility Top Rebate-Producing Colorado Residential Trade Partner" for Insulation and Air Sealing from 2013 to 2025
Why You Need an Energy Audit
Every home leaks energy in ways you’d never spot on your own, from drafts around windows and doors to ductwork dumping warm air into the attic. An audit replaces guessing with data. Most homeowners who act on their audit findings cut energy use by 10 to 40%, and the benefits go past the utility bill:
Lower bills by sealing the leaks that waste the energy you’re paying for.
Real comfort, with fewer drafts, fewer cold rooms, and a second floor that isn’t an oven in July.
A healthier, safer home, because combustion testing catches gas and carbon monoxide risks.
Higher resale value in Denver’s competitive market, where efficiency upgrades are a genuine draw.
A solar-ready home, since tightening the envelope first means you don’t pay to power leaks later.
What's Included in an Energy Audit
A comprehensive home energy audit covers the same core diagnostics, so you know exactly what you’re paying for:
Blower door test to measure how much air your home leaks and pinpoint where.
Infrared (thermal) imaging to reveal insulation gaps and cold spots hidden inside walls and ceilings.
Insulation inspection in the attic, walls, and crawl space to check depth and performance.
Duct leakage assessment with the furnace or AC running, room by room, to find unbalanced or leaking ductwork.
Combustion safety testing on your furnace, water heater, and other gas appliances, including a carbon monoxide check.
A written, prioritized report with real repair estimates and every rebate you qualify for.
The audit takes about two hours, and someone 18 or older needs to be home. Xcel Energy customers pay just $135 because the utility covers 60% of the cost, and we handle all the rebate paperwork for you. The full price is $335 before rebates, and customers on other utilities may still qualify for local discounts.
Why Choose REenergizeCO for Home Energy Audits?
Not all energy audits are created equal. Some programs hand you a report and leave you hunting for a contractor. We do the audit, the estimates, and the installation under one roof.
- One team, start to finish. We find the problems, price the fixes, and do the work, then verify it with a test-out.
- Construction-savvy auditors. Our analysts understand how Denver homes are actually built, which means more accurate findings and realistic estimates.
- Xcel Energy Top Rebate-Producing Trade Partner, 2013 to 2025. We’ve helped more Denver homeowners claim air-sealing and insulation rebates than any other contractor in the area, and we handle the paperwork.
- Real next steps. You leave with a prioritized action plan and real pricing, and we can often schedule the work within weeks.
When you choose us, you also get audits underwritten at 60% ($135 for Xcel Energy customers), in-house connections to air sealing, HVAC, and solar upgrades, and friendly auditors who explain every finding in plain language.
Frequently Asked Questions
What is a Home Energy Audit?
A home energy audit is a head-to-toe diagnostic of how your home uses and loses energy. A BPI-certified analyst measures air leakage with a blower door test, finds missing insulation with infrared imaging, checks your ductwork, and tests your gas appliances for safety. The visit ends with a written summary report that ranks energy efficiency fixes by impact, with real pricing for every recommended service.
Should I get a home energy audit before a remodel?
Yes, and before you open any walls. Once drywall is down, the cheapest time to air-seal top plates, add insulation in exterior walls, and fix duct runs is gone. A home energy audit before a remodel tells you exactly what to fix while the framing is exposed, which is the single best window you’ll get on an older Denver home. If you just bought a house, the same logic applies: schedule the audit first, then plan the projects.
Does Xcel Do Home Energy Audits?
Xcel Energy strongly encourages home energy audits and subsidizes most of the cost, but the utility does not perform the audits itself. You book a registered contractor who meets its professional standards, and most Colorado customers qualify for a rebated audit every two years. REenergizeCO has been the top rebate-producing home energy audit service in the Denver area since 2013.
What should I expect when REenergizeCO visits my home?
Plan on about two hours for the visit, with someone 18 or older home. We test the whole home: blower door, infrared scan, duct leakage check, and combustion safety testing on your gas appliances. You don’t need to do much to prepare beyond clearing access to the attic, furnace, and water heater. After the visit you get a written, prioritized summary report with repair estimates and the Xcel rebates you qualify for.
What equipment is used during a Home Energy Audit?
Blower Door: A blower door is a fan mounted on an exterior door. We close all exterior doors and windows and open all interior doors. We then draw air through the building structure to highlight air infiltration. The usual suspects include can lights, door jambs, window seals, interior wall top plates, mechanical chases, fireplace chases, electrical lines, plumbing penetrations, junction boxes, and speakers.
Thermal Imaging: The infrared camera is used in conjunction with the blower door. Once we identify all air leaks, we can quantify their impact on the house by measuring the temperature at specific locations. This tool allows us to see behind drywall and into exterior wall spaces. We’ll know whether you have insulation and whether it is performing with this tool. The infrared scan for air leaks is one of the most valuable parts of the audit process.
How do I choose a home energy auditor in Denver?
Pick an auditor by credentials and diagnostics, not the sales pitch. Look for BPI certification, and insist on the full diagnostic stack: blower door, infrared imaging, and combustion safety testing. If any of those three are missing, it isn’t a complete audit. Denver sits in Climate Zone 5B at over 5,000 feet, and thin air changes how appliances vent and how heat moves, so local experience matters. You should walk away with a written, prioritized report with real pricing.
Red flags: a “free” audit that’s really a sales call, no blower door or infrared on site, no written report, or a hard push toward one product before they’ve measured your house.
What types of Energy Efficiency Tests are performed?
- Combustion Appliance Zone (CAZ) Test: CAZ testing is simple but essential. Xcel Energy requires critical combustion safety and carbon monoxide tests during every audit. If we air-seal and insulate your house, we don’t want a leaking gas appliance inside the newly tightened home. We complete a test during the audit, then again after any work is completed.
- Attic Inspection: Attic spaces have a big effect on the house. We enter the attic space and take digital photos of the interior and exterior wall top plates to show how effectively or ineffectively they are sealed.
- General Review: We also document the plumbing and electrical wiring that enter the house through chases or holes, as well as the insulation style and depth in the space. We review the eave and peak ventilation to determine whether to baffle or block the intake air, then measure to confirm you have sufficient intake and exhaust ventilation.
REenergizeCO will handle all paperwork, ensuring that all eligible rebates are received from local utilities and energy programs.
What is the best time of year for a Home Energy Audit?
There’s no wrong time to schedule a home energy audit, but winter is ideal. The colder it gets, the harder your furnace works and the more obvious your leaks become. Uninsulated attics are the worst offenders, since up to 25% of your heated air can escape through the top of the home. Booking your visit in winter also gives you time to finish energy efficiency upgrades before the summer heat arrives.
Are Home Energy Audits expensive? Can I get a coupon or rebate?
Xcel Energy customers pay just $135 for a full home energy audit because the rebate program covers 60% of the cost, and we handle all the rebate paperwork for you. The full price for this service is $335 before rebates, and customers on other utilities may still qualify for local discounts. Most Colorado homeowners qualify for a rebated home energy audit every two years.
How do you prove the audit work actually paid off? (Test-In / Test-Out)
Most home energy audits stop at a report. Ours is built around a “test-in / test-out” process, the gold standard for proving your home actually got tighter. Test-in: the initial blower door test sets a baseline for how leaky your home is. Then you get prioritized recommendations, and our in-house crews complete the energy efficiency upgrades you approve. Test-out: we return for a second visit, run the blower door again, and the before-and-after numbers show exactly how much air leakage we eliminated.
That final test is your receipt. It turns “we sealed your attic” into a measurable reduction you can see on paper.
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Number of Years in Service
910
5 star reviews
$1Mil
$ in Rebate Incentives Submitted
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As a certified energy auditor with Xcel Energy, we have conducted hundreds of home energy audits across the Denver metro
Ready to Take Control of Your Home’s Energy Use?
Contact us today to schedule your home energy audit and discover where your home is losing energy — and how much you could save with targeted, cost-effective improvements.