Frequently Asked Questions

AFUE (annual fuel utilization efficiency) is the measurement of how efficiently a gas furnace or boiler will operate over an entire heating season. AFUE is measured as a percentage, so the higher the better.



COP (coefficient of performance) is the measurement of how efficiently a heating or cooling system will operate at a single outdoor temperature condition. A COP in the high single digits is fantastic.



HSPF (heating seasonal performance factor) is the measurement of how efficiently heat pumps will operate in their heating mode over an entire heating season. An HSPF between 7 and 8 is typical for a good rating for an energy-efficient heat pump.

In a nutshell, we help you save energy and cut carbon emissions. One of the ways we do this is by offering the community energy assessments, advising, and funding for qualified projects.

We strive to maximize efficiency. Sealing air leaks before improving insulation ensures you get the most out of your energy upgrades.

Yes! In fact, if you are a Holy Cross Energy customer, you can apply for CORE rebates and Holy Cross Energy Rebates at the same time.



Visit our Residential Rebates page for more information: aspencore.org/residential-rebates

CORE provides rebates for these residential and commercial measures, and if your idea contributes to a project with a Home Energy Rating System (HERS) index of <10, you might qualify for a net-zero grant. If you have questions, call our Energy Concierge at 1-970-925-9775 x1003.

If your home is not connected to the grid or is in Glenwood Springs and not on the Glenwood Springs Electric grid, your project does not qualify for CORE rebates.

Your application must be submitted within 90 days of completing a project. Invoices must be dated within 90 days of applying for a rebate.

We do not rebate solar in Eagle County. Visit https://www.holycross.com/renewable-energy/ for solar rebates.

Yes, but only for Aspen Electric customers. For more information about funding for EVs, check out http://garfieldcleanenergy.org/evs/ and https://www.holycross.com/charge-at-home-charge-at-work/.

Call our Energy Concierge at 1-970-925-9775 x1003.

Windows don’t pass the “cost-effectiveness test” for reducing carbon emissions and we want you to get the most bang for your buck.

Yes, we do.

You bet!

Yes, we provide solar rebates in Aspen, Town of Snowmass Village, and Pitkin County.

We do not provide rebates in Garfield County, but check out https://www.holycross.com/rebates/ and http://garfieldcleanenergy.org/res-buildings/ to find rebates in your area.

A rebate is a retrospective reimbursement for a project that CORE has determined significantly reduces greenhouse gas emissions in the environment. Please check our website at the beginning of each year as rebate options change.

Once you fill out this form, you are on the path to zero and may submit multiple invoices with a few project photos.

To benchmark a property, building owners will need to take three steps:

1. Create an account in Energy Star Portfolio Manager (the EPA’s free tool used by more than 300,000 properties across the United States.)

2. Add your property’s information (property type, square footage, etc.). 3. Enter the energy, water, and gas data for your property for the reporting year.

Questions? CORE can help benchmark for you. Call us at 1-970-925-9775.

There is no charge to the building owners or to the City of Aspen to use the Energy Star Portfolio Manager platform to benchmark.

See the City of Aspen's website for more information about the BPS timeline: aspen.gov/BuildingIQ.

In addition to it being a law in Aspen, there are multiple reasons benchmarking benefits you and the community. Through the Building IQ program, building owners can expect to:

-Conserve energy.

-Help manage your building.

-Inform City of Aspen energy programs.

-Market as a green building.

-Support global climate action.

-Identify short- and long-term savings.

There are a lot of things you can do to improve the performance of your building, including simple upgrades like updating your lighting and adding controls. Since each building is unique, we recommend starting with an energy assessment through CORE. Then, we can evaluate your energy use and make suggestions specific to your building.

To schedule an energy assessment, call our Energy Concierge at 1-970-925-9775 x1003.

Find the ordinance on the City of Aspen's website: aspen.gov/BuildingIQ

We serve Pitkin and Eagle Counties in the Roaring Fork Valley.

9 a.m. - 5 p.m. MST, Monday - Thursday.

Yes, definitely! We can provide countless examples of heat pump installations that have been very successful in mountain communities.



Learn more about heat pumps here: https://www.aspencore.org/blogs04a61323/heat-pumps-are-the-hottest-thing-also-because-theyre-cool

We have an office located at 129 Emma Rd. Unit B, Basalt, CO 81621.