Technical Bulletins

Tips and guides for getting the most out of the Duke Energy RNC Program

Recommended EELC Courses

This Technical Bulletin highlights recommended courses in the Duke Energy RNC Energy Efficiency Learning Center.

Posted September 2019

Commonly Overlooked Items

This Technical Bulletin highlights the most commonly overlooked issues that impact HERO performance and incentives, along with error prevention methods.

Posted July 2019

Spray Foam Safety

Spray polyurethane foam (SPF) has gained popularity in the residential construction industry with its ability to expand into gaps and cracks, resulting in an effective air seal and insulator. This technical bulletin shows safety procedures when using SPF.

Posted June 2019

The Six-Sided Wall

Missing air barriers cause the largest portion of air leakage and thermal loss in the home. This technical bulletin shows the concept of the “six-sided wall” to help identify missing air barriers.

Posted May 2019

Plan Review Tool

In an effort to make plan take-offs easier and more consistent, ICF created a plan review tool with excel. This technical bulletin shows how to use the plan review tool.

Posted April 2019

Data Verification for Submitted Homes

The RNC Program requires verified addresses, climate zones, orientations, and permits. This technical bulletin shows best practices on verification.

Posted March 2019

Properly Air Sealing Tray Ceilings

It is critical to ensure proper air sealing throughout the entire home to meet infiltration requirements and ensure grade I insulation. This technical bulletin shows best practices when air sealing tray ceilings.

Posted February 2019

Diagnosing HERO Compliance

Chasing down the causes of a HERO code failure can be tricky, especially when using the standard code compliance reports available in Ekotrope and REM/Rate. This technical bulletin for raters is a short review of the best method available for identifying issues with HERO compliance.

Posted December 2018

Air Sealing Checklists for Builders

The PDFs available below are thorough checklists for builders as they inspect the work of their trades. Items are organized by area: floors, walls, ceilings, HVAC/ducts. A section dedicated to post-drywall items is also provided to help you “hunt for CFMs”, if your blower door is coming in a little too high.

Posted December 2018

DG 700 Manometer Functions

The DG-700 Manometer is the most commonly used pressure measurement device by RNC Program raters. This is an outline of basic DG-700 controls and functions.

Posted November 2018

Blower Door Testing in the Wind

Severe wind can be a difficult challenge to overcome when performing accurate infiltration tests. In fact, conducting infiltration tests on days with wind speeds exceeding 20mph is not recommended. This technical bulletin offers tips on adjusting to moderate levels of weather interference when conducting blower door tests.

Posted October 2018

LED Lighting

Ekotrope and REM/Rate recently released versions that include the ability to capture LED savings. LED lights can produce high-quality instant-on lighting with as little as half the wattage of a CFL, translating to larger rebates in the RNC Program.

Posted September 2018

Conducting an Automated Multi-Point Blower Door Test

Proper multi-point blower door testing is now more important than ever with RESNET Standard 380 coming into effect. This technical bulletin offers guidance multi-point blower door testing using the TEC DG-700 manometer paired with the TEC Wi-Fi link.

Posted August 2018

Infiltration Testing Correction and Standard 380

Std. 380 requires that single-point blower door tested CFM be corrected by +10% (ex. - if single point tested CFM = 100, modeled CFM must = 110). This bulletin briefly covers options for conducting multi-point testing.

Posted June 2018

Rater Field Guide Reminders

The RNC Program maintains guidance for raters on the Program's Rater Field Guide page. The technical bulletin below covers some highlights that all raters should keep in mind when modeling and submitting homes to the RNC Program.

Posted May 18, 2018

Blower Door Testing and Std. 380

ANSI/RESNET/ICC Standard 380 will soon replace Chapter 8 of the RESNET MINHERS Standard on how to conduct building and duct leakage testing and must be followed by all HERS Raters and RFIs for homes permitted on or after July 1, 2018.

Please follow the link below for the full technical bulletin. 

Created April 10th, 2018

Grading Insulation Installation

Grading Insulation depends entirely on the quality of installation. For information on insulation grading, click on the link below. 

Created April 3rd, 2018

Duct Leakage Testing and Standard 380

Effective July 1, 2018 (permit date), all program homes must follow the testing guidelines that have been updated in RESNET Standard 380.

Please follow the link below for the full technical bulletin that calls out the most important changes to the standard.

Created March 2018

Flexible Vs. Rigid Air Barriers

Proper air barrier installation is one of the key details that must be implemented consistently to meet the 4.0 Air Changes per Hour (ACH50) requirements for HERO Code.

For details on best practices, click below to download the full technical bulletin as a PDF.

Created February 2018

RESNET/ICC Standard 380

ANSI/RESNET/ICC Standard 380 has replaced Chapter 8 of the RESNET MINHERS Standard on how to conduct building and duct leakage testing and must now be followed by all HERS Raters and RFIs. 

For details on how this will impact the Duke New Homes Program, click below to download the full technical bulletin as a PDF.

Created January 2018

Modeling Advanced Framing

REM/Rate accepts inputs that describe the "framing factor" of a building component. This bulletin provides best practices for capturing the benefits of advanced framing in walls and ceilings. 

Click below to download the full technical bulletin as a PDF.

Created October 2017

Advanced Framing

Advanced framing is a term used to describe a number of methods that help builders use less framing material without compromising structural requirements in new homes. Using advanced framing opens up more space for insulation, which helps builders increase their HERO compliance rate and incentives.

Click below to download the full technical bulletin as a PDF.

Created September 2017

Post-Drywall Air Sealing

Trim out presents some good opportunities to make up for missed air sealing... and some possible stumbling blocks. View the full technical bulletin below for a full list of post-drywall air sealing hot spots.

Created August 2017

Update to Slab Edge Insulation Guidance

Slab edge insulation remains a critically important detail for most homes built on slabs. The recently updated guidance for stem wall applications provides an acceptable pathway to claiming this savings measure.

Created June 2017

Top Plate Air Sealing

The most common cause of HERO code failure is missing the required 4 ACH50 blower door target. Properly air sealing top plates on every home's upper floor is one of the most effective methods for increasing your pass-rate (and ensuring that your homes get the best rebates). The full technical bulletin below covers common top plate mistakes and fixes that are applicable in all home types. 

Created May 2017

Slab Edge Insulation

Slab edge insulation plays a critical role in complying with the NC HERO code in all climate zones. While it is possible to forgo this measure and then trade off in other areas of the performance path metric, slab edge insulation is much easier, more cost effective, and creates more comfortable homes.

Created April 2017

Townhouse Air Sealing

Just like in single-family detached homes, whole-home air sealing in townhomes is critical to qualifying for rebates in the Duke Energy Progress RNC Program. 

Click below to download the full technical bulletin as a PDF.

Created March 2017

Air Sealing - Top 5

Whole-home air sealing is a critical part of qualifying for the highest rebate incentives offered through the Duke Energy Progress Residential New Construction (RNC) Program. To qualify for Whole Home Incentives larger than $750, homes must come in under four air changes per hour (ACH).

Click below to download the full technical bulletin as a PDF.

Created February 2017

Efficient Lighting

Efficient lighting, including CFLs and LEDs, is the quickest and easiest way to increase your savings and rebates in the HERO+HERS incentive pathway. Click below for the full technical bulletin.

Training Manual: Townhouse Air Sealing

The training manual below expands on the topics covered in the RNC Program's technical bulletin on the same topic. This 3-step manual walks through the process of preventing uncontrolled infiltration in townhomes and includes descriptions and visuals for specific problems and solutions. Many of the solutions also apply to single-family detached housing.