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Choose our Service Door when you need an interior or exterior closure option that is secure, durable, customizable and compact.

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Whether you need advanced performance for security, productivity or air protection at the opening, we can suggest the right door or grille to meet your performance needs

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We didn't invent the insulated door – but we perfected it. Choose our market-leading energy-efficient insulated doors in extreme environments or anywhere you want to save on energy costs and go green.

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No matter if you need it side folding or vertical coiling, our grilles provide both security with visual access for interior and exterior openings.

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Commonly utilized in cafeterias, concession stands and ticket booths, Counter Shutters, also known as Counter Doors, provide accessibility and security in interior and exterior finished wall openings

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There are many factors to consider when choosing how your door will operate. How fast you want it to open, how many times a day will it cycle and if there is power available are just a few of these factors. Here, you will find information on each of our available operators.

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Find Out What's New with Rolling Doors and Security Grilles - Welcome to Cornell's Blog!

When it comes to Overhead Rolling Doors and Grilles, we are the experts in innovative door solutions!

Coiling Doors Can Meet Building Envelope Code Requirements

March 21, 2018 by CornellCookson

It’s not an oxymoron!  Next generation coiling doors are more efficient than ever before.

energy efficient garage doors

Design professionals and building owners are increasingly demanding products that meet and exceed code requirements, particularly any requirements having to do with energy savings. The focus on “green” is becoming more widespread, leading to changes in regulations, codes, green building rating systems, and building products. Specifically, code authorities have highlighted that reducing air infiltration and improving insulation is critical for improving the performance of exterior  energy efficient garage doors.

First, a few definitions.  Air infiltration is defined as the unintended flow of air through cracks in the building envelope – particularly in and around window and door openings. Insulation is defined as a material’s resistance to conductive heat flow measured in terms of its thermal resistance. Code compliance can be defined in two ways when discussing energy savings: prescriptive and trade-off. The prescriptive compliance path means that a component must meet a specific level of performance. The trade-off compliance path allows for one component to fall short of the minimum level of performance that is outlined in the prescriptive path, but another component must “overperform” to offset the reduced level of performance of the other component. A trade-off is designed to allow trades to be made between various parts of the building envelope.  That said, a little-known fact is that this system of trade-offs is not allowed for air infiltration codes – all air infiltration codes must be met to the letter, no trade-offs allowed.

 

International Energy Conservation Code (IECC) 

T he International Energy Conservation Code was created to address the design of energy-efficient building envelopes and the installation of energy-efficient mechanical, lighting, and power systems through requirements emphasizing performance. This code establishes minimum regulations for energy-efficient buildings using prescriptive and performance-related provisions. Its impact is widespread - many state and local governments have already adopted the IECC. One area of particular interest to us is that its requirements reduce the allowable air infiltration rate for coiling doors. Section C402.5.2 requires that air infiltration for fenestration assemblies cannot exceed 1.00 cfm/ft2, and section C402.1.3 requires an data-sf-ec-immutable="">of 4.75.

For more information on R-value vs. U Factor, click here

energy efficient garage doors air leakage

ASHRAE (American Society of Heating, Refrigerating, and Air Conditioning Engineers)

The purpose of the ASHRAE 90.1 standard is to provide minimum requirements for the energy-efficient design of commercial buildings, including energy efficient garage doors. This standard also provides minimum requirements for the design and construction of new buildings and their systems, new portions of buildings and their systems, and new systems and equipment in existing buildings. It also provides criteria for determining compliance with these requirements. The provisions of this standard apply to the energy-efficiency of the building envelope, heating, ventilating, and air conditioning systems, service water heating, electric power distribution, motors and drives and lighting. ASHRAE 90.1 requires that air leakage for coiling doors cannot exceed an air leakage rate of 0.4 cfm/ft2. Section 5.5.3.6 lists the prescriptive building envelope data-sf-ec-immutable="">of .31.

Code Adoption

Building energy codes set minimum efficiency requirements for newly constructed and renovated buildings, providing energy savings and emissions reductions over their long life spans. Building energy codes are intended to overcome market barriers, such as the builder typically not paying the energy bill for the building, or not having an incentive to include cost-effective measures that have a higher upfront cost. Buildings built to code are more comfortable and cost effective to operate. The U.S. Department of Energy (DOE) participates in code development, adoption, and implementation processes; it contributes to new model energy codes by creating proposals based on publicly reviewed cost and technical analyses and then contributes to code adoption and implementation by providing technical assistance to states and localities, which includes the development and distribution of tools, materials, and analyses. As of September 2016, adoption is tracked based on a quantitative analysis of energy savings impacts within a given state. This provides a greater level of accuracy and replaces the previous approach, which was comprised of a simpler qualitative review of state code titles and provisions. 

 

A few fun Energy Code facts:

  • 7 states lack a statewide code
  • 3 states are less energy-efficient than 90.1 – 2007
  • 3 states 90.1 – 2007 or equivalent
  • 23 states between 90.1 – 2007 and 90.1 – 2010
  • 2 states 90.1 – 2010 or equivalent
  • 6 states between 90.1 -2010 and 90.1 – 2013
  • 3 states 90.1 – 2013 or equivalent
  • 4 states more energy-efficient than 90.1 – 2013

 energy efficient garage doors map

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Cornell is the industry leading rolling door, security grille and closure product experts since 1828. To inquire how Cornell's long history of innovation and customer service can help you with your next rolling door project, call 1-800-233-8366!

 

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