Jan 2nd, 2009, 13:12 | #1 |
Senior Member
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九牛二虎之力才装上去的木头duct
原来这里是个铁皮箱子。连同四周的铁皮与梁之间的空隙形成回气/风管道。 连同周围的铁皮也用7/16的OSB替换了。 改成木头的初衷是减少杂音。这些铁皮其实就是吹奏乐器里的簧片呀。 那些打了不少xx的铁皮就是为了消声用的。 开始计划用隼接。最后不得不钉子了事。箱子是1/4的OSB嵌在木头的槽里面的。加上caulking不会比铁皮漏风的。 此帖于 Jan 3rd, 2009 01:26 被 dalplex 编辑。 |
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Jan 3rd, 2009, 09:05 | 只看该作者 #14 |
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注册日期: Jul 2004
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ASHRAE 62-2004
5.5.1 Resistance to Mold Growth. Material surfaces shall be determined to be resistant to mold growth in accordance with a standardized test method, such as the “Mold Growth and Humidity Test” in UL 181,10 ASTM C 1338,11 or comparable test methods. Exception to 5.5.1: Sheet metal surfaces and metal fastners. Note: Even with this resistance, any airstream surface that is continuously wetted is still subject to microbial growth. 5.5.2 Resistance to Erosion. Airstream surface materials shall be evaluated in accordance with the “Erosion Test” in UL 18110 and shall not break away, crack, peel, flake off, or show evidence of delamination or continued erosion under test conditions. Exception to 5.5.2: Sheet metal surfaces and metal fasteners. |
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感谢 Hoover 此篇文章之用户: |
dalplex (Jan 3rd, 2009) |