Insulation Institute Blog

HERS=2 and ACH50=0.75 at Just $85/Sq. Ft.!

When Paul Torcellini, principal engineer in the commercial buildings research department at the National Renewable Energy Laboratory, decided to build his own home he admittedly had a bit of an advantage. As a building scientist and recognized expert in methods to achieve substantial whe building energy savings, Torcellini undoubtedly leveraged his experience to construct his 3,600 sq. foot Connecticut home to achieved a HERS score of 2 with a 0.75 ACH 50. The result: A finished product that garnered Torcellini a 2016 DOE Housing Innovation Award (read the full home profiled here).  Paul’s was also the lowest cost house among all the award winners. His home demonstrates that builders who fully leverage solid building science practices can achieve high-performance, air tight construction while keeping costs in check.

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HERS=2 and ACH50=0.75 at Just $85/Sq. Ft.!

4 Tips to Ace Your Blower Door Test

Thirty-six states currently use a version of the residential energy code equivalent to the 2009 IECC specification or lower. Many of these states will soon act to update their residential energy code to the more modern versions of the IECC, which include more stringent air leakage requirements measured by blower door testing. However, many builders will find it difficult to meet the 3 ACH 50, as required in CZs 3-8 starting in the 2012 IECC, unless they properly train their tradespeople in building science and the basics of blower door testing, according to Robert Nelson, managing principal of Ener G Home Performance Consultants.

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4 Tips to Ace Your Blower Door Test

5 Ways Millennial Buyers Aren’t So Different

Much has been made about the vaunted power of the Millennials to shape home sales in the coming years. These adults, born between the 1982 and 2003, will wield tremendous influence and comprise roughly 36 of the U.S. population by 2020 (77 million people). Much of what sociologists report about Millennials centers on the many ways they’re different from Boomers or Gen Xers, such as being more civic minded, collaborative and technologically savvy. And while marketers often focus on their differences compared to other generations, truly understanding this customer segment is about seeing both the similarities to and differences from other generations.

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5 Ways Millennial Buyers Aren’t So Different

Residential Energy Efficiency: The RX For Health

A report released recently by E4 The Future, which promotes residential clean energy and sustainability, examines the body of research supporting the considerable benefits of home performance/energy efficiency measures. The report concludes that not only do energy efficiency measures, such as increased insulation and air sealing, improved heating, and ventilation increase the comfort of the home, but also provide considerable occupant health benefits.

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Residential Energy Efficiency: The RX For Health

Overcoming Barriers to SEE Building

By Thomas Peterson, Institute for Super Energy Efficient Building, Founder and President

The Institute for Super Energy Efficient Building

When I first became involved with energy efficient housing back in the 1970s I figured that such housing would quickly take off.  It didn’t. I was determined to find out why.

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Overcoming Barriers to SEE Building

New Codes, Air Sealing and “Dynamic Walls”

By Michael Schettine, Technical System Expert

New Housing Energy Requirements

The ante has been raised by states adopting the 2015 IECC energy code, and builders are scrambling to meet new requirements.

A large part of the new requirements involve envelope air leakage standards. Simply put, the house (envelope) air leakage, when tested at 50 Pa pressure differential, ‘shall not exceed’ 5 air changes/hour (ACH) in U.S. climate zones 1 and 2 (warmer areas) and 3 ACH in the remaining cooler zones 3-8. New homes must be tested, and those meeting the requirements will receive a “Certificate of Occupancy,” which will be necessary for sale of the structure. Because the building must be largely completed before the testing can be performed, builders get one shot at achieving the air leakage standards, if the building doesn’t pass, costly rework and retesting must be done to ensure compliance with code.

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New Codes, Air Sealing and “Dynamic Walls”

Appraisals Will Soon Include HERS Scores

Among the many factors consumers should consider when buying a home is the cost of ownership — recurring expenses that are variable and not always obvious.  One of those is energy costs, which are estimated to consume up to 4% (roughly $2,200 per year) of the average household’s income, before taxes.[1] Building more energy efficient homes, however, has helped decrease electricity demand, which was down 1.1% in 2016.[2]  That’s certainly great news, but many consumers in the market for a home have little or no information on the energy efficiency of homes they may be interested in buying. A new effort by Residential Energy Services Network (RESNET) and the Appraisal Institute, the association of professional real estate appraisers, will make home energy efficiency more transparent to buyers.

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Appraisals Will Soon Include HERS Scores

Who’s Driving Energy Efficiency

A collection of national, state and regional organizations are driving building energy efficiency through advocacy, research, policy analysis and action

There’s no shortage of information on the economic, energy security and environmental benefits of energy efficiency and new statistics emerge every week. But, while information on the myriad advantages of energy efficiency is abundant and accessible, lesser known are the organizations that are quietly taking a leading role in advancing building and home energy efficiency. This week, we highlight just four of the many organizations driving building energy efficiency at the national, state and regional level:

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Who’s Driving Energy Efficiency

3 Ways Raters Can Help Builders Cut Costs

NAHB recently released the results of their monthly Housing Market Index survey which included a set of special questions. The data revealed top builder pain points in 2016, and how builders expect these pain points to change in 2017. The top problem continues to be cost and availability of labor, which builders see increasing in 2017. Interestingly, the problem which showed the greatest increase 2017 vs. 2016 is building material prices, which jumped 12 points (the next biggest change was 7 points). HERS Raters, in their consultative function for builders, can play a role in addressing this key pain point relating to insulation costs. Here are three specific ways raters can address builder cost concerns:

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3 Ways Raters Can Help Builders Cut Costs

An Architect’s Tips on Selling Energy Savings

In a blog post last month, we posed the question: do consumers want energy efficiency upgrade options? Since then, we’ve received feedback from high performance building advocates, builders and architects – one in particular who offered guidance on selling energy efficient home options to today’s homebuyers.

Antonio de la Carrera of ADLCL Architecture is a Dallas-area architect with experience in sustainable, energy efficient and Net Zero custom homes in cities including Dallas, Boston, Chicago and Mexico City.  His experience has led him to identify three crucial tips that builders of all types and sizes should use to better sell energy efficiency.

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An Architect’s Tips on Selling Energy Savings