What is nathers for existing home

Short Answer

It is a national program that rates the energy efficiency of homes that have already been built.

Full Answer

NatHERS for Existing Homes uses thermal modelling software to assess how well your current home maintains comfortable temperatures throughout the year. It is based on verified information about your home’s insulation, windows, orientation, construction materials and overall design. The outcome is a star rating from 0 to 10.

Why this matters

The rating helps homeowners understand where energy is being lost and where upgrades can improve comfort and reduce bills.

How Certified Energy can help

We are accredited to assess existing homes under the NatHERS framework and provide detailed reports that support retrofit planning, loan applications or energy rebate programs.

Related Regulations

• Developed under the National Energy Performance Strategy

• Supported by state and federal sustainability initiatives

Helpful Resources

• Do NatHERS for Existing Homes ratings expire?
• Who can carry out a NatHERS for Existing Homes assessment?
• What is the minimum star rating for NatHERS for Existing Homes?
• Can I use NatHERS for Existing Homes to apply for finance or upgrades?
• How to increase a NatHERS for Existing Homes rating?