答复

1. 
   Anon3|2017年3月21日06:22 PM|＃1

   Do you actually use the exhaust fan much to matter? An ERV exhaust from bathroom 24/7 is a much better idea.

2. GBA Editor
   马丁·霍洛拉|Mar 22, 2017 05:07am|＃2

   槊，
   Panasonic'sFV-05VK3的规格Whispergreen风扇claim 12.4 cfm/watt.

   因此，Airking风扇索取的16.4 CFM /瓦特击败了12.4 CFM /瓦特的松下索赔。

   Note, however, that these claimed efficiencies occur at a static pressure of 0.1 inches w.g. Once you connect a typical ducting system (usually including an elbow or two), your static pressure will go up and your efficiency will go down.

   - Martin Holladay

3. 
   Lance Peters.|2017年3月22日06:21 AM|＃3

   同意。我仍然发现看到信封被推动非常有趣。

   有趣的是，在能源之星列表上，他们声明最大气流发生峰值效率：

   130cfm = 19cfm / w
   80cfm = 18.2cfm / w
   30 = 9.7cfm / w

   我将发布到es页面的链接，但它被阻止了。

4. GBA Editor
   马丁·霍洛拉|2017年3月22日06:37 AM|＃4

   这是你试图发布的链接吗？
   http://www.airkinglimited.com/page/m-energy-star-d4-exhaust-fan.html

   --Martin Holladay

5. 
   Lance Peters.|Mar 22, 2017 08:08am|＃5

   这是DL4S模型的能源之星站点列表的链接。

   Thanks for posting the company's product page. It looks like they have yet to update their own specs to match the ES page. Their site claims 40-120cfm, ES lists it at 30-130cfm.

6. GBA Editor
   马丁·霍洛拉|2017年3月22日09:55 AM|＃6

   槊，
   Perhaps this is the link:
   https://www.energystar.gov/productfinder/product/certified-ventilating-fans/details/2261807

   - Martin Holladay

7. 
   Lance Peters.|2017年3月22日09:58 AM|＃7

   That's the one! Thanks Martin. There are many versions of this fan between all the lights and sensors available, but they all share the same airflow specs.

8. 
   Lance Peters.|2017年3月22日09:59 AM|＃8

   In response to reply #1 (all I see is N/A N/A for a poster name?), there are many people who install exhaust only ventilation systems who would be very interested in the most efficient fan available for a 24/7 application. I personally would prefer a ducted ERV as you suggest, but that doesn't mean it's the most desirable solution for everyone or every situation.

   Look at it another way; how much more efficient would an ERV be with these fans installed running 24/7? If bathroom fans are getting this efficient the technology will soon spill into other ventilation products as well.

9. 
   Anon3|Mar 22, 2017 11:19am|＃9

   不，我们几乎达到粉丝时达到了最大效率。erv使用更多瓦特的原因是因为压力损失（通过核心，核心越大，压力损失越大，而且更好的效率，但更多的瓦特）以及需要进行过滤的需要。你知道，当达到1“压力损失时，滤波器设计为更换吗？结帐曲线，它应该是平坦的，而不是降低。

   它实际上对于摄入风扇保持恒定的气流在不同的压力损失上更为重要，如松下一个正在进行，以防止发生过滤载荷时发生负压。

10. 
    Lance Peters.|Mar 22, 2017 01:59pm|＃10

    好奇的管道损失，我发现了这个网站：

    http://www.freecalc.com/ductloss.htm

    I'm sure the "average" installation of a bathroom vent fan would be a hideous contraption compared to this proposal, but let's see what a semi energy conscious installer could accomplish. Let's face it, someone spending big bucks on an exhaust fan is more likely to insist on getting the details right.

    I modeled a 6" diameter galvanized duct 10' long with three "4-piece" 90 degree elbows at 1.5D, "none" for an entry (ideal since the fan connects directly to the pipe), and a 45 degree tapered contraction with a 4" diameter outlet (to simulate a reasonably restrictive exterior vent). The total duct loss on that configuration is 0.065" of water @ 80CFM, and that duct would cover a reasonably complicated install that covers 10 feet and goes up and over an obstacle (two elbows) before turning down (3rd elbow) through a soffit vent.

    更直接和高效的安装可能看起来更靠近这个;6“直径镀锌管道5”长，带有一个“4件”90度弯头的1.5D，“无”用于进入（由于风扇直接连接到管道，因此为54度锥形收缩“直径出口（模拟合理自由流动的外部通风口）。该配置的总管道损失为0.02英寸的水80cfm，并将覆盖更直接的安装在墙上外出，然后向下关闭（一个弯头）进入合理有效的拱道通风口。

    在流量调节的风扇的情况下，这两种情况都应该超过80cfm @ 0.1“水规格。这将对风扇的能量使用影响随着时间的推移，如果不是真正的价格，明智的百分比明智由于整体功率要求低，因此保存。

    是的，我正在分裂毛发，我得到它。但正如我之前所说的那样，有人在3-4倍上花费3-4x基本的排气扇成本对我认为的安装详细信息感兴趣。

    Comments WRT use in ERVs noted, and likely 100% true at higher flow rates. At lower flow rates, however, the core and filtration restriction drops dramatically and at 24/7 usage could make a significant difference in yearly power consumption. A 2000sqft four occupant household ventilating at 50CFM continuously with a 100CFM capable ERV could certainly see some savings.

    我知道，我知道......小土豆，但我认为看看细节很有趣，因为信封进一步推动并进一步推动。