RFP Regarding Spandrel Systems Sent Back, Outside NFRC’s Purview?

Shah oversees discussion on spandrel systems

During this morning's Research Subcommittee block, Chair, Bipin Shah, facilitated a discussion that resulted in NFRC members voting to return to its proponent an RFP regarding spandrel systems performance validation, saying the scope of the work falls outside NFRC's purview. 

The ballot regarding the RFP says that while spandrel systems differ somewhat from standard fenestration products, they still fit NFRC’s definition of a fenestration product and should therefore be included in the rating procedure for non-residential products.

The RFP suggests completing the following tasks:

• Designing and building various spandrel systems for testing. 
  
• Shipping test specimens to an NFRC approved laboratory for testing.  
• Conducting computer simulation of spandrel framing members for inclusion into the CMAST program.  
• Reviewing test data and comparing them with the simulation results.

Those who opposed the RFP contend this work falls outside NFRC’s purview, citing that other organizations may be better suited.

Following a member vote, the RFP will be returned to the proponent for further action.

Do you think the work, as set forth in these tasks, falls outside NFRC's purview? How are you involved with spandrel systems?

How might pursuing or not pursuing this RFP influence your customers and the way you do business?

NFRC Committee Week Meeting Underway in Las Vegas

Send us your questions for the Research and Technology Committee

The National Fenestration Rating Council's (NFRC) Committee Week Meeting is underway at Bally's Hotel and Casino in Las Vegas, Nevada.

The proceedings began this morning with the Research and Technology Committee setting the stage for discussing the ballots involved with a number of RFPs.

One discussion will be concerned with developing a test standard (comparable to the ASTM E2264) for whole window products. Another will focus on the development of a test standard (comparable to ASTM E2190) to provide a lifetime performance standard for whole window products.

The committee will also discuss identifying the list of typical spandrel system specimens and simulation and testing for U-factors to validate simulation procedures. 

Finally, the Research and Technology Committee will undertake a discussion that involves crafting a methodology for quantifying the development of thermal stresses in residential and commercial insulating glass units. During this discussion, particular emphasis will be placed on high-performing products.

Can't Be Here? We'll Get your Questions Answered

NFRC realizes that many people concerned with these topics cannot attend the Committee Week Meeting. Please post your questions and concerns here, and we'll find an expert who can help you.

Alternatively, you can post your questions in the comments section.

NFRC and your fellow members want to know what you think. Tell us here.

This Blog is Your Blog

The National Fenestration Rating Council's (NFRC) blog started out as a reporting tool, but beginning with this meeting it will serve as a communications tool.

The content that will be posted here during the meeting is designed to serve you -- the NFRC members who have committed their time and resources to travel to Las Vegas and take part in improving our programs. It is this kind of commitment that helps all of us better serve our stakeholders and the public.

This is the place to share your ideas, feedback, and industry expertise with a highly-targeted audience.

Let's get things started by considering why this meeting is important to you.

• What are the "hot button" issues?
• What do you hope to gain from the meeting?
• What information is most important to your stakeholders/customers?

Click on the "comment" tab below and let us know. Your peers want to hear from you.

Guest Columnist Dowd Discusses Choosing the Right Windows in Different Climates

In this installment, Dean Dowd, Chief Technology Officer for National Fenestration Rating Council (NFRC) member company, CalFinder, discusses how to choose the right windows for your climate.

By Dean Dowd

Which Types of Windows are Best for Your Climate?

To save money on your energy bills with new windows, you must first find the appropriate match for your climate. This may seem like a straightforward concept, but you’d be amazed at how often homeowners replace their windows with ones that are totally unsuitable for their local weather.

And you know what that leads to: untold heating and cooling dollars out the window (quite literally in this case). So in this week’s article, we’ll focus on how to reduce your energy bill by finding the best windows for your own climate. Here’s how to go about it.

Know Your Zone

First things first. To find the right replacement windows, first double-check your climate zone. Energy-Star, a government-sponsored energy-efficiency initiative, divides the United States into four main climate regions: Southern, South-Central, Northern, and North-Central.

Locate your zone using the map available here.

Homes in the Northern zone will benefit the most from windows rated with a U-factor of 0.30 or less and an SHGC of 0.35 or greater. Those in the North-Central zone (Kentucky, for instance) will perform best with a U-Factor between 0.28-0.32 and an SHGC of less than 0.39.

For the Southern zone, consider a window that has a rating of 0.60 or slightly less, and an SHGC of 0.25-0.27. Finally, homes in the South-Central zone (MS, for example) will get the best efficiency from a U-Factor 0.25-0.35/SHGC 0.30 or less-rated window.

Choosing the Right Window the First Time

NFRC rates and labels most new and replacement windows made. These labels contain pertinent data on window energy efficiencies, such as:

• The U-Factor, or how well the window insulates against heat loss. A U-Factor of 0.20 is generally the most insulating and 1.20 the least.

• Air Leakage (AL), which describes the level of air that escapes or enters via the tiny crevices in a window frame, is measured by cubic feet per square foot (cfm/sq ft). The lower the AL, the less air that passes through the frame.

• Solar Heat Gain Coefficient (SHGC) is how well a window blocks the radiant heat in sunlight. It is a number between 0 and 1, with the lowest number being the most ideal for keeping the most heat out.

Knowing these factors (among other pertinent but sometimes optional ratings), it’s important to realize that all windows leak heat come winter and allow it in the summer. With a highly energy-efficient window that’s mated properly to its climate, though, the leakage will be virtually non-existent.

Summary

Looks like a random bunch of numbers and confusion by now, huh? It's not. In addition to the information on this site, your contractor (given that they’re knowledgeable and up to date on window product ratings) should know your local climate and which type of window works best almost by heart.

So let's here about your experience. Has anyone found the NFRC label helpful in choosing the right kind of windows for their climate zone?

Guest Columnist Dowd Discusses Installing Energy Efficient Windows

The National Fenestration Rating Council (NFRC) is concerned with energy performance rating and certification programs for windows, doors, and skylights, otherwise known as fenestration products.

While NFRC focuses on educating the public about these activities and programs, we also recognize that once we have assisted consumers in choosing products to improve energy efficiency, many of them still have questions about installing the products.

NFRC does not recommend or endorse any products, retailers, or installation companies. Nevertheless, we are pleased to welcome comments from Dean Dowd at NFRC member company, CalFinder. Here Dean provides consumers of energy efficient windows with some peripheral insight.

By Dean Dowd

Working with Your Contractor to Ensure a Successful Window Installation

Installing new, energy-efficient windows not only increases your home’s resale value, it also reduces your heating and cooling bills. But choosing the right contractor—and then working with them throughout the installation—can sometimes be a real chore. Consider the following tips that any homeowner looking to replace their windows should know before hiring and working with a contractor.

Choosing the Right Contractor—Your 5-Step Checklist

1. To get an accurate estimate, collect information about your existing windows. Take pictures, get measurements, and ascertain the basic condition of the frames.

2. Obtain at least three bids in writing, and remember, do not always assume that the lowest bidder will be just as good as the next guy—it could go either way. Paying a little more to get a better contractor is often worth the added expense.

3. Most states have some form of licensing bureau, so it’s best to check with them to make sure your contractor has the right licenses or permits. In addition, you can check other credentials, like memberships with the National Fenestration Rating Council (NFRC) and Window and Door Manufacturers Association (WDMA).

4. Demand references, check your local BBB office, and find out from previous clients if they were completely satisfied and that the work began and ended punctually.

5. Also demand proof from the contractor that he is fully insured and bonded. Any good contractor should have a minimum of liability and workers-compensation insurance, as well as some sort of waiver of liability in case the contractor does not pay his own bills.

Selected a Contractor and Ready to Go?

Once you’ve done your homework and found the perfect contractor, the single most important thing to do is to get a contract written and signed. Any sound construction contract will include, at a minimum:

• The contractor or business's full name, address (never accept only a P/O box), and applicable phone numbers—especially that of the lead person(s).

• License number if applicable in your locale.

• A comprehensive ‘blueprint’ of the window installation/replacement process, the materials needed and the contractor’s guarantee on quality of materials and workmanship.

• Charges: This fundamental component should detail the expected cost, e.g. hours billable and cost of materials.

Additionally, do not let a contractor charge you more than 15% of the total cost before starting work. Homeowners sometimes elect to pay somewhere around 30% at the midpoint and the remainder upon completion of installation.

Guest Blogger, Dowd, Discusses Common Misconceptions about Window Technology

Dean Dowd is the Chief Technology Officer for NFRC member company, CalFinder. This week, Dowd picks up where he left off, providing additional thoughts on understanding energy efficient windows.

By Dean Dowd

There are many misconceptions, not to mention all-out, baseless myths—about replacement windows and their performance. So, without further adieu, let's get to debunking and shed some light on the matter.

Four Common Window and Window Replacement Myths

1. Installing highly energy efficient windows will save you hundreds of dollars per month or year.

Some claims regarding the amount of money one can save are exaggerated. Say, for instance, that you buy and install a brand-new window with the highest energy-efficiency ratings (U-Factor of about 0.18 and an AL of <0.3 cfm/sq ft, for example) for an average cost of $130 plus installation. While the resale value of your home definitely goes up and you'll likely experience less heat gain in the summer and more in the winter, your return on investment (ROI) will be very minimal for several months, and it will take at least a year or two to recoup the cost of the window and installation.

It is best to think of your investment in windows as producing a return over time rather than right away.

2. Replacing an older single-pane window with a double-pane, double-glazed one will always raise energy efficiency and lower heating and cooling bills

The lines are a little blurry on this idea. In a perfect scenario, yes, double-pane glass will be significantly more energy efficient than older, single-paned ones, especially if the latter is poorly sealed. However, even double (or triple) pane windows can be just as energy-robbing as old windows if the sashes and frame are incorrectly installed, and/or the window edging is improperly fit to the structural frame (even if it's only off by a centimeter).

3. In the event of a tornado, opening a window or two will help balance the pressure inside the house when the ultra-low pressures inside a tornado hit, thus preventing the explosion (or implosion) of the house.

The physics of this one are actually pretty sound in theory, but with one major problem: in the real world, a tornado's raging, 100-mph-outer-winds will annihilate virtually anything in their path, so you'd be very fortunate to reach that point in a tornado (to that theoretical point of ultra-low pressure near the center) without your entire house being ripped off its foundation first. Therefore, it's completely nonsense.

4. Simply placing newspaper, a towel, or other 'insulating' material between the frames will solve the problem of old, drafty windows.

This "theory" is probably the easiest one here to quickly dispel. Using household items such as duct tape, towels, newspaper, or—the worst idea ever but one that's too frequently seen—aluminum or tin foil, may provide very short-term relief from heat gain or loss, but is ultimately just a band-aid that will eventually have to be replaced with a professionally-made and engineered window, as even half-good window manufacturers sell.

We hope this has helped clear up some of the most often-repeated myths about window technology. If you have any more questions or myths to debunk, just let us know in the comments below.

Guest Columnist, Dowd, Explains Window Ratings

Dean Dowd is the Chief Technology Officer for NFRC member company, CalFinder. This month, Dowd offers the first part in a series dedicated to understanding energy efficiency.

By Dean Dowd

Understanding Energy Efficient Windows

Energy efficiency ratings reveal the differences between high performing and low performing windows, and yet few consumers actually understand them. Let’s break it down, once and for all, and help you choose the best windows or doors for your money. In general, energy efficient products are those that consume less energy but offer an equal (or even better) level of usefulness. Many items around the home can be either energy efficient or energy draining.

Examples include the following:

• Windows
• Skylights
• Doors
• General appliances
• Electronics and more

What Do The Numbers on the NFRC Label Stand For?
One of the most common questions consumers ask is, "What is fenestration?" Fenestration is defined as any opening in a building's envelope, including windows, doors, and skylights.

Take a look at this sample NFRC label (left). Notice the visible transmittance rating (VT), wind permeability (AL), U-Factor, and SHGC ratings. Not all manufacturers use all of these ratings supplied by the NFRC. But many of them, especially ENERGY-STAR-labeled products, do.

• The U-factor: this is a measure of how well a product prevents heat from escaping from a home or building. The U-Factor starts at around 0.19 (the most insulating) and tops out around 1.25 (the least insulating). The lower the number, the better the product retains heat.

• Air Leakage: AL measures how much outside air comes into a home or building through a fenestration product. The measure of air is expressed in cubic feet of air per every square foot (cfm/sq ft). Old, outdated windows typically have high air leakage. Therefore, old windows have a very high AL value, while new, energy-efficient ones have low and ultra-low AL ratings (0.2-0.4 is ideal).
 
• Visible Transmittance: VT measures how much visible light comes through a product. In other words, it is a central measurement of how much light permeates a material, or in this case, glass. Ratings are between 0 and 1, and of course, the lower the number, the less light that enters the home.

• SHGC: The Solar Heat Gain Coefficient (0 to 1) rates how much radiant heat from sunlight is allowed to pass through your window. The lower the number, the less sunlight entering your home. A lower number will be great in the summer, but on the flip side might prove undesirable in especially-frigid winters and climates.

• CR: Condensation Residence is how well a window guards against condensation in the cracks and sills. A window that blocks the most moisture buildup will have a high CR rating, and those with less protection will maintain a lower CR.

Which Kind of Window is Most Efficient for My Home?

A double-pane, argon-filled, Low-E (emissivity) window is an example of a cost-efficient way to provide improved energy efficiency. Although they’re present in most new homes, ultra energy-efficient replacement windows (and other products) can equally benefit older homes in terms of efficiency and monthly utility bills.

In Summary

Energy efficient appliances and fixtures:

• Reduce energy costs

• Help the environment and lessen the greenhouse gas problem

• Can work side-by-side with renewable energy sources (solar, wind, etc.)• Can be found in new/replacement windows

What Exactly Does NFRC Do?

It's important to know that NFRC certifies the energy performance of fenestration products. NFRC does not sell windows nor does it endorse any manufacturer, retailer, or installer. As a third-party, independent certification organization, NFRC provides the energy performance information consumers need to make better decisions about the products they purchase.

NFRC's certification and labeling program is voluntary, so you may not see the NFRC label on every product.

So What do You Think?

Are you in the market for new windows, doors, or skylights? Have you seen the NFRC label? Did you understand how to read it and what the values meant? How can NFRC help make you a more informed consumer?

Get in touch with us in the comments below.

If you are interested in becoming a guest blogger, please contact Tom Herron, NFRC's Communications and Marketing Manager.