|
Re: NFRC Gold Label
11/2/2009 12:37:21 PM
(Total replies: 0)
|
| NAMI=National Accreditation and Management Institute. This is the NFRC accredited inspection agency for this NFRC participating window manufacturer.
NFRC 100/200=These are the two NFRC standards that the energy ratings are derived from.
PAT=MW Patriot of Rocky Mount, VA. They are an inactive NFRC participant.
rating: NFRC=this manufacturer rated using NFRC methods
series: 1700/1800/1900 SH= the manufacterers single hung series numbers
MST: 4060: uncertain what this means. ... |
|
|
|
Re: U Factor Equation
10/23/2009 11:37:00 AM
(Total replies: 0)
|
| NFRC 100 refers to ISO15099, seciton 4.1.3, equation 9. It is an area weighted sum of the U-factors of the edge of glass, center of glass, frame, divider, and divider edge area. Please refer to ISO 15099 for futher information.
|
|
|
|
Re: NFRC 100 and ASHRAE 90.1-2004
10/23/2009 10:22:44 AM
(Total replies: 0)
|
| NFRC always encourages full NFRC certification for NFRC ratings. Full certification means the code offical will have a third party to confirm the ratings. ASHRAE 90.1 requires NFRC 100 AND 200 be used to determine U-factor, SHGC, and VT. these docuemnts imply using the simulation software. ASHRAE requires the use of an accredited lab such as NFRC accredited lab to do the simlations. please use our web site to locate an accredited lab. YOu are correct, i cannot interpret ASHRAE as an NFRC ... |
|
|
|
Re: NFRC 100 and ASHRAE 90.1-2004
3/25/2009 12:09:03 PM
(Total replies: 0)
|
| Dear SIBDLEED,
Please email me direclty at rmcgowan@nfrc.org for a detailed explanation. NFRC is frequently getting this quetion based on LEED requirments. |
|
|
|
Re: Adding films to insulated windows
9/4/2009 8:29:05 AM
(Total replies: 1)
|
| I assume you are asking about window manufacturers? If so, I cannot speak for them. You are a real estate inspector. What are you inspecting for? Window energy performance? If so, NFRC rates aftermarket window films. Please ask the window film supplier to provide the NFRC ratings for the film. You will then know the improved energy performance resulting from the film. |
|
|
|
Re: U-factor / heat loss effects of windspeed
8/25/2009 11:57:51 AM
(Total replies: 0)
|
| Yes, NFRC U-factors use a 15 mph exterior windspeed assumtion.
Currently, NFRC does not have a u-factor rating for window films. NFRC may consider that rating in the future. |
|
|
|
|
|
|
Re: Energy efficiency airspace graph
7/1/2009 2:28:46 PM
(Total replies: 0)
|
| Figure 3 in the current ASHRAE Fundamentals Fenestration Chapter will give you the answers. i cannot pass it along in this forum. |
|
|
|
Re: U factor ratings
4/13/2009 3:45:13 PM
(Total replies: 0)
|
| Dear SAM,
I agree that 0.25 or so is fantastic for aluminum. I encourage you to ask your source if that is an NFRC rating number. You may also use our online certified products directory to confirm the ratings.
You are correct that the NFRC u-factor, SHGC, and VT are calculated for the entire product including frame, sash, etc. |
|
|
|
|