How to Read the Mandatory Measures on a CF1R
Look for the page headed "2025 Single-Family Residential Mandatory Requirements Summary", which follows the certificate pages in the package we read. It lists code sections by system, not your design values, and applies whichever route you used. A star means exceptions may apply, and some lines point to a CF2R or to ECC-Rater testing.
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What the page is, and what it is not
Its opening note says single-family buildings "must comply with all applicable mandatory measures, regardless of the compliance approach used". The compliance manual adds that modeling software may not check them, and that inputs must be at least as efficient as the mandatory measures. So a Complies result on the certificate does not prove these lines are met. In the registered 2025 Laguna Niguel package, the compliance software labels the summary Form MF1R and prints it after the twelve certificate pages.
How it is laid out
Section numbers run down the left, plain-language rules on the right, grouped by system. The groups in that package run in this order:
- Space Conditioning, Water Heating and Plumbing
- Ducts and Fans
- Ventilation and Indoor Air Quality
- Electric and Battery Energy Storage Ready
- Lighting
- Building Envelope
- Solar Readiness
- Fireplaces
- Pool and Spa Systems
Three markers to act on
An asterisk at the end of a line refers to the footnote "Exceptions may apply", so read the Standards section before assuming a rule bites. Some lines say "CF2R certification required", such as the heat pump defrost delay of at least 90 minutes. Others rest on field verification: duct sealing and leakage testing, airflow and fan efficacy, and ventilation airflow with the range hood rating. Those lines hand work to an ECC-Rater, and they reappear on the ECC feature summary.
Turning it into a checklist
Mark the groups your job touches. Check that the envelope lines, such as the 0.40 maximum area-weighted U-factor for windows and skylights or R-19 for rafter-roof alterations, are written as notes on the drawings. Give the Ducts and Fans group to the HVAC contractor before equipment is ordered, with the Ventilation group, and the Lighting group to the electrician.
The numbered tour of the performance certificate itself is in how to read your CF1R. See also the CF1R overview, the CF2R page for installer sheets and what follows a changed installation. Our residential service supplies the package.
Common Title 24 Questions
- What is a CF1R certificate of compliance?
- What is a CF2R certificate of installation?
- What is a CF3R certificate of verification?
- What is an NRCC form?
- What is an NRCA certificate of acceptance?
- What is an LMCC form?
Frequently Asked Questions
In the package we read it is a separate summary printed after the certificate. The Energy Code requires the measures on every project whichever way compliance is shown.
Every line that applies to your scope. A starred line has exceptions in the Standards, and pool, solar-ready or fireplace lines matter only if the project includes them.
Explore CF1R: Certificate of Compliance
- How to Read Your CF1R, Page by Page
- What Is the CF1R for a House?
- CF1R-ALT-01-E, ALT-02-E and ALT-05-E: Which Alteration Form Is Yours?
- CF1R-ENV-02-E, ENV-03-E and ENV-04-E: The Worksheets Behind Your CF1R
- CF1R for Home Additions: Which Form Do I Need?
View all CF1R: Certificate of Compliance guides → · Forms and Certificates · Title 24 guide