CO2, VOC, RH, and CO ventilation controls for IAQ

布拉德·哈迪|发布一般的问题上June 14, 2016 02:13am

我的房子里将有一个Zehnder HRV，我在车库里安装了排气风扇。我希望HRV根据空中交换所需的操作并提供通风。我也希望它和车库风扇根据机载气体和湿度的水平自动运行。

For the garage, are there exhaust fans that will operate based on CO levels, and not just when the garage door opens and closes?

For the house, can a Zehnder HRV be set up to operate based on levels of CO2 (parties, large get-togethers), VOC, CO (cooking), and RH? Can they be remotely managed, and can the data be logged? Are these whole house IAQ systems?

有产品建议吗？

回答

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Replies

史蒂夫·纳普（Steve Knapp）CZ 3A佐治亚州|Jun 14, 2016 02:44pm|#1

Zehnder has a brochure that indicates its Comfortsense controller can serve as a bridge to CO2 and other sensors. I think you should contact the company with your questions--especially since you are spending big bucks for its HRV.
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Martin Holladay|Jun 14, 2016 04:25pm|#2

布拉德，
I don't know how far along you are with your project. If you are still in the planning stage, and you haven't yet purchased the Zehnder equipment, you may want to consider purchasing and installing a Conditioning Energy Recovery Ventilator, or CERV.

这是一篇文章的链接，其中包含有关CERV的更多信息：带有内置热泵的平衡通风系统。
布拉德·哈迪|Jun 14, 2016 09:01pm|#3

Martin,

很有意思。感谢您带领我发表这篇文章。我还没有到达购买设备的目的。实际上，我在房子上只有一楼的甲板，所以有时间进行更改。（我一直专注于一家高处的车库/车间/公寓，但这接近完成。）

我的关注（文章中解决）是导管。Zehnder具有本垒打无缝管道（我必须假设提高管道性能和损失）。另一个问题是单位的复杂性。

我可能会使用桑登热泵拆分热水器，而不是HPWH来加热我的水以供家用。我希望有一个热泵可以加热家用水，空间加热以及调理/通风。
安德鲁·巴特（Andrew Bater）|2016年6月14日下午09:52|#4

布拉德，我正在慢慢地为我的HRV添加“需求控制的通风”功能；听起来这就是您所追求的。在上个月内，我添加了此类控件，以将honeywell HRV切入高度时，当二氧化碳水平超过阈值时。（我的HRV连续从四个浴室中拉出空气，旅行到高处，并在特定浴室的电话中打开平衡的阻尼器。）

我有一个直接连接到HRV的陈旧空气放电的样品端口的Honeywell IAQPoint2 CO2监视器。IAQPoint2中的比例DCV电压驱动了Honeywell Jade节省器控制器。一旦二氧化碳水平超过700 ppm，我目前设置了该系统将我的HRV切换为高。

到目前为止，这非常有效，房屋中的一些额外人员和/或运行我们的丙烷范围将使二氧化碳水平高于阈值，并将HRV的trip trip to Trip。据我所知，Ashrae说的是外部二氧化碳水平上方600-700 ppm的任何东西是可以接受的，到目前为止尚未接近任何地方，到目前为止，我在这次猛烈抨击中看到了总数最高的850 ppm。有趣的是，二氧化碳水平回到我普通的“基线”一夜之间需要多长时间。

我还无法解释的另一件事是，当我运行Range Hood风扇从厨房中冲洗烹饪气味时，即使我在其他地方打开（供应/新鲜的空气）窗户，房屋仍然会增加二氧化碳。好像热烹饪气体消失了射程引擎盖，但二氧化碳却没有。

今年晚些时候，一旦房屋再次关闭，我可能会为玉器提供一些监视/伐木。特别是我很想知道我们是否正在从砌体加热器那里获得任何二氧化碳溢出物。

(The reading in the picture is from today, most of the windows in the house were open all day. Typically I see around a 550 ppm baseline with the windows closed.)
布拉德·哈迪|2016年6月14日下午10:03|#5

安德鲁，

是的，需求控制的通风是我要管理的IAQ的追求。我的房屋中不会有任何化石燃料电器，它是我们烧烤架和发电机外的全电池和财产。

我看着SiteSage Powerwise monitor and collect the IAQ data, elctrical and PV production. It was about $300/year for a two year subscription, and $2700 for the IAQ sensors and various equipment. I want to not only harness the info, but manage IAQ, electricity and other stuff via the controls. The Powerwise controls, aren't sampling duct air, but air within the rooms. This will give me a more accurate reading and better management I think via an HRV if I can link the systems together. Not sure this is the best approach though??? I was also hoping for remote control while on vacation and such.

We routinely have lots of people at our house for get-togethers. (We had over 60 folks and their kiddos for Thanksgiving dinner two years ago), so managing that CO2 and IAQ is important for me. Being new construction, I'm very interested in capturing VOC data too.

我想知道为什么您是否不降低二氧化碳水平，因为您在整个房屋中取样而不是在房间或地板上进行抽样？
Aaron Gatzke|Jun 15, 2016 03:35pm|#6

Brad and Andrew, in your quest for Demand Controlled Ventilation to reduce indoor pollutants, have you investigated/utilized any additional filtering system for your HRV so that you are not introducing outdoor pollutants?

谢谢
安德鲁·巴特（Andrew Bater）|Jun 16, 2016 05:47am|#7

添加/替换过滤在我的列表上。现在，我只有HRV随附的可洗滤镜，并在摄入量上进行粗屏幕。

I wiped out the HRV cabinet and washed the core and filters a few weekends ago; I find that needs to be done about every six months. The most significant contaminant I have here at the farm is dust and pollen. That and small spiders that seem to have no problem going from one side of the core to the other.

前几天，我点了额外的霍尼韦尔HRV过滤器。一旦他们掌握在手中，我可能会看到我是否可以让某人以更好的MERV等级制作匹配的过滤器。HRV随之而来的是Merv 0.1，足以阻止棒球。

我正在考虑在HRV前的某种独立过滤框，类似这样的盒子：http://www.supplyhouse.com/Fantech-FB6-FB6-In-Line-Filter-Box-w-MERV-13-Filter-6-Duct如果此盒子还可以过滤掉烘干机或射程引擎盖排气时，该盒子还可以过滤掉供应小型进气的空气阻尼器的空气。迄今为止，困扰我的是弄清楚如何隔离这样的盒子，以便在冬天没有凝结问题。我对此的最后想法是在卡车上发现的外部过滤器外壳：https://www.donaldson.com/en/engine/filters/air-intake/cleaners/era.html
查理·沙利文（Charlie Sullivan）|Jun 16, 2016 09:36am|#8

A solution to the problem of condensation on the filter housing is to put the final filter after the HRV rather than before. The filter before, usually built into the HRV, prevents clogging of the heat exchanger; the one after is to reduce whatever pollutant you are concerned about. That's particularly important with a carbon filter, which works better with lower relative humidity. (The HRV lowers the relative humidity of the incoming air when it warms it.

至于控件，从商业级昂贵的系统中有一系列选项，该选项旨在根据居住率差异很大的空间中的二氧化碳水平来控制通风，再到使用基本传感器板和为Arduino Controller编写代码的DIY Hacker方法。我会倾向于基于二氧化碳的通风控制，并倾向于监视更多内容并记录它们的传感器系统。简单基于CO2的控制的一种选项是：

http://www.co2meter.com/collections/fixed-wall-mount/products/asense-wall-co2-and-temperature-transmenter
安德鲁·巴特（Andrew Bater）|2016年6月16日下午1:49|#9

Yes, the extra filtering can go after the HRV; that is an excellent approach particularly for temperature sensitive media. In my case I am trying to cut down on HRV cleaning cycles. Having to wash the core, wipe the cabinet, and clean the dust off fan blades and motor at 6 month intervals is not optimal. It would be far better to replace one disposable filter every so often.

正如我所想的那样，我并不感到惊讶的是，我的HRV变得肮脏，因为它经常会改变入站空气的相对湿度。潮湿和污垢粘在一起！