Step by Step:
Before reading further, the potential provider of data to the IGDB should consider whether they can meet the following basic conditions:
If you think that you can provide data under the above conditions then you should read further and familiarize yourself with the details of the process. Questions about these requirements and all other IGDB related matters should be addressed to IGDB@LBL.gov
The manufacturer is responsible to select and measure a representative sample for the product. Properties of a representative sample:
· A random sampling of the sold product should have properties equal to, or both higher and lower, compared to the representative sample.
The selected sample must be stored for at least four years.
Applied film and laminate manufacturers should submit their products on clear glass substrates, preferably 3 mm low-iron, to minimize any influence the substrate has on the submitted data.
The product must be flat and the surfaces must be parallel.
Furthermore the product must be specular in the solar (300-2500 nm) wavelength range. Specular glazings scatter very little light on transmission as well as reflection in the full range.
The easiest way to determine if a product is specular is by using visible inspection, if it looks milky or hazy it is not specular. If you can see a clear and undistorted image through it the product is specular. For the UV and near infrared range a spectrophotometer with an integrating sphere can be used assuming the sphere has a specular exit port. If the ratio between diffuse and total transmittance is less than 0.05 it can be considered specular. The same procedure holds for reflectance.
The solar optical properties (300-2500 nm) shall be
characterized in accordance with NFRC 300. Data should be recorded at every 5 nm in the solar range.
The infrared properties (5-25 micron)
shall be characterized in accordance with NFRC 301. Data should be recorded at least every 1 micrometer. Ideally the infrared properties should be measured up to 40 micron.
Those documents are available from http://nfrc.org/Templates are provided for each type of accepted glazing material.
Caution: There are many instances in these examples which contain the word "reference" in the title. The first- time data submitter is advised to avoid these data types for now. They refer to cases which can be "deconstructed" in Optics5 and then recombined with other components to calculate the properties of a variant on the original glazing. See the general warning on calculated data. This entire section will be rewritten here with proper instructions for safe use of "reference" files.
First time data submitters should provide the following information:
A Data Submission Spreadsheet is required with each data submission.
Click here to download spreadsheet: DataSubmissionSpreadsheet.xlsx
The preferred method is to email files to LBNL at IGDB@LBL.gov and to accounting at NFRC. They will end up in the same place. There are forms that need to be provided with the data. The LBNL data submission form is also attached to this page and the NFRC glass measurement location and glass supplier contact form is on the NFRC site.
If a manufacturer’s data is to be submitted by a third party, and the third party will be listed as the Manufacturer in the IGDB, in essence “re-branding” the product, the third party must have the product measured and submit it to the normal IGDB review process independent of any submittals under the original manufacturer’s name. The submittal must indicate, for each product submitted, the original product manufacturer.
In addition, the third party must obtain permission from the original manufacturer for both submitting the data and for re-branding the product. This permission must be submitted to Lawrence Berkeley National Laboratory (LBNL) in the form of a letter from the original manufacturer, on their company letterhead, listing the products that will be re-branded. If the manufacturer has submitted data to the IGDB under their own name, this letter must come from the manufacturer’s IGDB contact. This letter (or letters if the products are from multiple manufacturers) must accompany the data submission forms. In the case where the manufacturer wishes to discontinue having the re-branded product in the IGDB, another letter from the manufacturer must be submitted to LBNL. An example of a re-branding letter is available for download at the bottom of this page.
At this time NFRC requires payment of fees only for products that are intended to be used in NFRC window property simulations and ratings. If data is submitted directly to LBNL, the intent of the data provider to obtain NFRC ratings will be determined and NFRC will be so informed. NFRC approved files will be so marked in the IGDB. The fee schedule is available on the NFRC website. This policy may be changed at any time at the sole discretion of NFRC.
This final stage consists of waiting for the review to quietly conclude. Sometimes there are questions from the LBNL internal reviewers or the peer reviewers that require checking and resubmission of data. All data submitters automatically become members of the peer review group and will receive emails with data that is being considered for the next IGDB update. This is not meant to be a test or an impediment, but a cooperative process leading to proper submission of accurate data. The requirements on technical review, peer review and quarterly publication intervals are given in NFRC 302, Sections 3.5-3.8. Each submitter is given a reserved block of NFRC ID numbers.
There are going to be six IGDB releases per year. Data submitters should follow the schedule below for their data submission. Due to shorter processing time, we will no longer accept more than 100 submissions or requests for modification/change from each manufacturer, in each cycle.