Window and Door Industry from A to Z

January 15, 2014

DWM Shelter MagazineEvery specialized field has their own vocabulary and the door and window industry is no exception. During my sales presentation I talk about things like U-Factor, low-E, DP rating, etc., and it is a foreign language to my clients. I believe translating our language for my clients is essential to the sales process.

An educated consumer is my best friend. When I can translate our language, I can educate the homeowner as to how they might benefit by choosing my products. My clients can be confident they made the right choice based upon their knowledge. They are more likely to be satisfied with their purchase. They understand why a product is more expensive when they understand how it is better. They can make better comparisons with better understanding of our baffling language. When the consumer understands our language, I sell more and for higher profit.

In order to translate our language to clients so they can choose wisely, I need to have a thorough grasp of our language – including our funny habit of using initials to identify some of our industry’s most important organizations, measurements and rating systems.

In my last blog, I made a list of examples where we are more likely to use initials than words in the window and door industry. I called it a Window and Door Word Puzzle. Just in case I stumped you, here are the words that go with the letters of the Window and Door Industry Alphabet I provided in my last blog:


AAMA – American Architectural Manufacturers Association

ABC – Always Be Closing

AIA – American Institute of Architects

ASCE – American Society of Civil Engineers

ASTM – American Society for Testing and Materials


BBB – Better Business Bureau


CRF – Condensation Resistance Factor


DOE – Department of Energy

DP Rating – Design Pressure Rating

DH – Double Hung

DWM – Door & Window Manufacturer Magazine, of course!


EPA – Environmental Protection Agency

EREN – Energy Efficiency and Renewable Energy Network


FMA – Fenestration Manufacturers Association


GBG – Grids Between Glass


HUD – Housing and Urban Development


IBC – International Building Code

ICC – International Code Council

IGU – Insulated Glass Unit

IRS – Internal Revenue Service




Kr – Chemical element symbol for Krypton Gas


LEED – Leadership in Energy and Environmental Design

LoE – Low Emissivity


MMPA – Moulding & Millwork Producers Association


NAHB – National Association of Home Builders

NARI – National Association of the Remodeling Industry

NFRC – National Fenestration Rating Council

NGA – National Glass Association

NSA – National Sunroom Association


OSHA – Occupational Safety and Health Administration


PVC – Polyvinyl Chloride


Q-lon – Door weatherstripping manufactured by Schlegel


RESNET – Residential Energy Performance Network

R-Value – Measures insulation value

RRP – Renovation, Repair and Paint (lead paint rule)


SGCC – Safety Glazing Certification Council

SHGC – Solar Heat Gain Coefficient

STDL – Simulated True Divided Lites


T-mull – T-shaped mullion used to join multiple fenestration units


U-Factor – The inverse of R-Value

UFI – United Frame Inches

USGBC – United States Green Building Council


VI – The Vinyl Institute

VT – Visible Light Transmittance


WDDA – Window and Door Dealers Alliance

WDMA – Window and Door Manufacturers Association


XO – Left handed sliding door viewed from outside looking in (X is the operating panel and O is the fixed panel)





This blog post originally appeared in DWM Magazine.

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