Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Indoor AirPlus

Indoor AirPlus Version 2 Development

In February 2023, the EPA proposed updates to the Indoor AirPlus program including a two-tiered certification program and other changes to strengthen and update program specifications and requirements.  Additionally, the EPA proposed changes to the training requirements for partners, and a Home Certification Organization model to improve quality assurance. The public comment period is now closed. Thank you to those who reviewed and provided input. 

The final Indoor AirPlus Version 2 Certification Protocol, National Program Requirements, Verification Requirements, and supporting resources can be found on the Program Documents webpage. The EPA will be making additional revisions to the proposed IAP V2 Certification System and HCO Application for Recognition, anticipated for release in late 2024.

The EPA reviewed and responded to this feedback in a comment response document and summary of updates featured below. See also the Executive Summary and archived documents below for additional background information. 

  • Indoor AirPlus Version 2 Response to Public Comment (PDF)(44pp, 256 KB, July 2024, EPA-402-K-24/004)
  • IndoorAirPlus Version 2 Highlights – Summary of Updates (PDF) (4pp, 174 KB, July 2024, EPA-402-K-24/009)

Indoor AirPlus Version 2 Archive

Indoor AirPlus Version 2, 2023 Public Comment Documents

Public comment is now closed on the draft documents below.

Executive Summary and Highlights

  • Draft Indoor airPLUS Version 2 Executive Summary (pdf) (110.46 KB, February 2023)
  • Draft Indoor airPLUS Version 2 Highlights Summary of Proposed Updates - 2nd Public Comment (pdf) (234.92 KB, February 2023)

Program Requirements and Specifications

  • Draft Indoor airPLUS Certified Homes National Program Requirements, Version 2 (pdf) (293.76 KB, February 2023)
  • Draft Indoor airPLUS Certified Verification Requirements for Homes and Apartments Version 2 (pdf) (1.45 MB, February 2023)
    • Draft Indoor airPLUS Certified Homes and Apartments Quality Assurance Checklists, Version 2 (pdf) (848.71 KB, February 2023)
  • Draft Indoor airPLUS Gold Verification Requirements for Homes and Apartments Version 2 (pdf) (1.54 MB, February 2023)
    • Draft Indoor airPLUS Gold Homes and Apartments Quality Assurance Checklists, Version 2 (pdf) (879.7 KB, February 2023)  

Certification Protocol and System

  • Draft Indoor airPLUS Certification Protocol for Homes and Apartments (pdf) (320.63 KB, February 2023)
  • Draft Indoor airPLUS Certification System for Homes and Apartments (pdf) (3 MB, February 2023)

Additional Resources

  • Response to Public Comments Received on the Initial Draft of the Indoor airPLUS Version 2 Construction Specifications (pdf) (354 KB, February 2023)

Sign up for Email Updates on Indoor airPLUS.

Indoor AirPlus

  • Indoor Air Quality Home Page
  • About Indoor AirPlus
  • Indoor AirPlus Partnership
  • Your Indoor AirPlus Home
  • Program Documents
  • Marketing and Outreach
  • Leader Award Winners
  • Indoor AirPlus Frequent Questions
Contact us about Indoor AirPlus
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on August 30, 2024
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.