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 is used to perform an energy model of the home's initial design and the final built conditions. The HERS rating results in a Certificate and with an index (like a score) that shows the market how great your home performs.

Option 1 : Streamlined

For the highly organized 'dialed in' projects:

Give us all your project specs and we'll provide the best HERS rating service available. Of course we're available for technical support and remote consulting as needed.  

Option 2: Detailed support needed

This approach is for those that need a higher level of consulting to adjust the home design for energy code compliance, or to optimize for energy performance and budget driven goals.

We will provide insights on thermal boundary design, specific product recommendations, and will complete several energy model scenarios to present the cost/benefit analysis for various options. This option includes a higher level of remote consulting that is often needed to meet new energy code requirements for owner-GC's and builders new to the current code climate. 

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

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. 

What is a HERS Rating?

HERS Rating process:

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. 


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 of the Energy Star Thermal Enclosure System Rater Checklist

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

The Mass Save 'tiered' program design is over . The new rebate structure is custom to each home. It is called the 'Blended Savings Approach'. Projected energy savings are calculated from 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  2018 Terms and Conditions Application . 


Mass Save Mechanical System rebates 

For projects finishing after June 30, 2017,   mechanical system rebates are not available on a per unit basis. These system rebates are bundled into the savings calculated in the Blended Savings equations. 

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

By the time you're reading this, your legislatures may have gutted the energy efficiency fund, seriously. Contact us for latest rebate offerings. Those new highway tolls can't come soon enough.

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. 

Your PV Solar Energy Design Report

Included in our HERS rating package for new construction projects, upon request. 

We believe solar energy (PV) should be considered during the design phase of your new home. In addition to the environmental benefits of using renewable energy, solar power is supported by tax incentives at the state and federal level, as well as state production credits and savings on your energy bill.

This report is meant to make the investment in PV easier. It is a snapshot of some key information from our energy model to inform a PV system design from your installer.

Your PV Solar Energy Design Report includes:

Results of the preliminary energy model without PV (the home as designed) compared to results with a typically sized PV system:

  • HERS index, before and after PV
  • Net annual energy consumption before and after PV
  • Annual energy bills before and after PV

Building specifications to make PV quotes simpler:

  • Roof orientation and pitch
  • Roof area
  • Shading
  • 3D sketchup model (by request)
 Your report is generated with data from the Preliminary HERS model at no additonal cost.

Your report is generated with data from the Preliminary HERS model at no additonal cost.

We can help with design for net zero

Getting close to net-0* is easier than ever. High efficiency affordable electric heating, cooling, and hot water systems make the target increasingly cost effective. We have a lot of experience working with high performance buildings. Using our energy model tools, we can create varying design scenarios to determine the most efficient and practical way to meet building performance goals. The earlier we are involved in the process the better, as home layout, orientation, and even framing design, can impact energy performance targets. Our process follows some well established principals for high performance home design:


Principals of cost effective Net-0 design:

  • During design development consider roof pitch, PV capacity, and orientation
  • Have excellent insulation R values and a clear air-barrier strategy
  • Build as tight as possible and use balanced ventilation systems for the best indoor air quality
  • Spend more on insulation but less on heating and cooling equipment
  • Simple home forms are easier to build well, insulate, and air seal.
  • Select efficient appliances and lighting
  • Expensive windows aren't necessary if shading and glazing-to-floor-area ratios are considered

(A 'net-0' home is a home in which the amount of energy consumed by the building is roughly equivalent to the amount generated with renewable energy systems)

PV Installers and builders, we'd love to hear your feedback or recommendations about this effort to integrate renewable energy system design into the HERS rating process. Contact us.


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.