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TREAT Accreditations


RESNET Accreditation – TREAT 3.4 is  RESNET Accredited as an Existing Homes Tax Credit Compliance Tool.

Several of TREAT’s internal calculations have been improved and validated against the RESNET accreditation suite, which includes the following tests:

  1. HERS BESTEST Tier 1 Tests
  2. RESNET DHW Tests
  3. RESNET HVAC Tests
  4. RESNET DSE (Distribution System Effectiveness) Tests
  5. RESNET Heating and Cooling TestsL125A


DOE Approved

TREAT is nationally-approved by DOE for energy audits on all residential building type in the Weatherization Assistance Program:

  • Single Family
  • Low-rise Multifamily
  • Mid-rise Multifamily
  • High-rise Multifamily
  • Mobile Home



CalTEST Results

TREAT Modeling Procedure for CA Homes

CalTEST Uncalibrated Tests:



Approved for Washington State Weatherization Programs

TREAT is approved by the State of Washington for Single Family and Multifamily Low Income Weatherization Programs. TREAT is the only tool used by the state in these programs.



NYSERDA Home Performance with Energy Star and Multifamily Performance Partner Program Tool

TREAT is an official software tool approved for use in both the Single Family Home Performance with Energy Star program as well as, the Multifamily Performance Partner Program. PSD supports these programs with TREAT software, training, and other building science training to help maintain an educated workforce and help homeowners save energy and money.




EmPOWER Maryland Low Income Energy Efficiency Program

The EmPOWER Maryland Low Income Energy Efficiency Program (LIEEP) helps residents of low income households install energy conservation materials in their homes at no charge.



Official Tool used in the New Hampshire Saves Home Energy Assistance Program

The mission of NHSaves is to advance the efficient use of energy, while caring for the environment and promoting economic development in New Hampshire. NHSaves means you and your electric and natural gas utilities, working together to save energy, reduce costs, and protect the environment.



Official Program Modeling Tool for the State of Illinois’ Multifamily Weatherization Program

The Multi-Family Illinois Home Weatherization Assistance Program (IHWAP) is for building owners who provide housing to income-eligible residents in Chicago and suburban Cook County. The program will require a 50% mechanical contribution from the owner, if 66% or more of the tenants are income eligible. IHWAP is a federally and state funded program that helps to make low-income housing more energy efficient, safe and comfortable. Weatherization measures are identified during an energy audit conducted by CEDA’s state-certified assessors.



TREAT Hardware Requirements

  • Disk space: 2 GB
  • Windows Operating System: Windows XP, 7, 8, and Windows 10
  • Pointing device (i.e. touch screen devices are not supported)

Energy Programs

Designing and implementing cost-effective performance-based energy efficiency programs.

Program QA

Leading provider of QA services supporting energy efficiency programs throughout the country.


PSD Compass is a configurable enterprise solution for energy efficiency programs and implementers.


Technology for large-scale electrification, Heat Pump + Retrofit Toolkit, standardized simulations and tools.

Energy Codes

Expert technical leadership achieving decarbonization, cost-effectiveness, resilience, and equity goals.

HERS Provider

Accredited Home Energy Rating Provider, offering nationwide technical support and services.


Moving the industry forward with PSD’s intimate knowledge of how buildings work.


Join our growing team of energy efficiency professionals to help us save energy to save the planet.