HIS & HERS Energy Efficiency provides exceptional building performance services.
We will help you build a better building  cost effectively. 

As a small shop that uses efficient tools for energy modeling and data collection,
our rates are among the lowest in the Northeast region


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Certified HERS Ratings

It's in our name because this is our bread 'n butter. HERS stands for Home Energy Rating System. A Home Energy Rating involves onsite inspections and an analysis of a home's construction plans. A software tool, Ekotrope, is used to perform an energy model of the home's initial design and the final as-built conditions. The HERS rating results in a Certificate and with an index (like a score) that shows how your home performs.

We will provide insights on your thermal boundary and HVAC design

Whether your goal is to just pass energy code, or to achieve a 0-energy home, we will provide you with recommendations and suggestions to most cost effectively meet the project goals.

**HERS Ratings include all energy code and rebate program administrative requirements. 

What is a HERS Rating?

1: Pre Construction :  Introductory meeting, preliminary HERS rating from plans, review of results, technical support.

2: During Construction site visit  - Insulation and duct inspection, air-barrier checklists (if required), continued technical support.

3: Post Construction site visit - Visual inspection and diagnostic testing, HERS certificate is generated, administrative requirements completed for incentive programs.

Visit here for more descriptions of HERS Ratings from RESNET.

Our process is streamlined and without hidden fees

We use tools such as Sketchup and mobile forms to complete the energy model for your project. We understand that as the project is built, there will likely be deviations from the original design.

Sketchup enables us to accurately and efficiently update the energy model through the building process.  Unlike other HERS raters that charge extra if your plans change, we don't because we can very efficiently make the changes.  

We maximize your rebates

The Massachusetts and Connecticut rebate programs require a certified HERS rating. We will handle all of the paperwork and will communicate clearly to ensure you receive the maximum rebates available. 

Multi -family and 3+ single family projects

Pricing is greatly reduced and is custom to each project.  email your plans for a quote. Pricing can be as low as $500/unit. 


Mass Save Residential New Construction rebates

If you are building a new single family or multi-family home, this incentive program is a no-brainer. Don't be put off by the administrative requirements. We will hold your hand through the entire process until you receive a nice check. A certified HERS rating is required in addition to sections 2 and 4 of the Energy Star Thermal Enclosure System Rater Checklist.  We have an introduction to this checklist here.

As a Certified HERS Rater, we are approved to deliver the following incentives through the Mass Save Residential New Construction Program.

Rebates are based on modeled energy savings, calculated from our HERS rater software. 

Rebates are calculated as follows:

Participant Incentive = A * kWh + B * MMBu + C * %Savings

A= $0.35/kWh   B= $35/MMBtu    C= $3,000 single family project (1-4 Units)  = $2,000 multifamily (5+ units)

Program requirements are detailed in the  2019 Terms and Conditions Application . 


Mass Save Mechanical System rebates 

For new construction, mechanical system rebates are bundles into the ‘Pay for Savings’ total project rebate. 

System rebates may be available through other programs, such as the MassCEC. However applicants should be aware of 'double dipping' in more than one Mass Save program. 

Contact us for a full overview of incentives as they pertain to your project.

Connecticut Residential New Construction program

The 2019 Energize CT RNC (Residential New Construction) Program offers excellent rebates based on confirmed HERS index scores. Detailed rebate structure can be found on the Application here.

Blower Door testing

AIrtightness testing is required for the 2012 IECC and 2015 IECC energy codes. All homes need to be tested an confirmed to have a leakage rate of <3 ACH50 . Air Changes Per hour at 50 pascals (ACH50) is determined with this equation:  

ACH50 = (CFM50 blower door reading * 60) / Volume of conditioned space

A blower door test and airsealing inspection before the sheetrock is installed is recommended if there is any doubt that the air leakage target will be met. 

Duct Testing


  • At rough-in, air handler not installed:
    Duct Blast Test Ducts Only
    Max leakage 3 cfm per 100 sq ft. of conditioned floor area

  • At rough-in, air handler installed:
    Duct Blast Test w/ indoor unit
    Max leakage 4 cfm per 100 sq ft. of conditioned floor area

  • Post-Construction, total leakage:
    Duct, Registers, Indoor unit
    Max leakage 4 cfm per 100 sq ft. of conditioned floor area

Ventilation testing

Ventilation testing is required for all rebate programs and the 2012 and 2015 IECC energy code (Mass amendments). This simple test confirms that the ventilation system - programmable bath fan or balanced HRV/ERV system, is drawing enough air to meet the ASHRAE 62 standard. 


New Construction

As your HERS Rater we support you in building an energy efficient home while ensuring code compliance and that all available rebates are leveraged.

Projects we work on range from high performance custom homes to subdivision developments. The scope of our involvement ranges from basic code compliance testing to assisting with thermal boundary and mechanical system design before construction begins.