Hot water heating
关于我的家庭热水计划需要一些建议…
非常狭窄的牧场房子……水。良好的压力..
房子的主侧有大师浴。（带有浸泡浴缸），其他3个全浴和半浴……。都彼此相近……
kithcen side is very far away.. (75-100 feet away) … has a full bath , half bath, and kitchen sink…and a washing machine.
On Master side i am planning on a large heat pump water heater( i have a good utility room for it) attached to a manifold with 1/2 lines to showers, 3/8 lines to sinks and toilet.
was also planning on running 3/4 directly to soaker tub.
在厨房方面……我要安装一个从主侧的热泵热水器喂食的马拉松电池……（至少它正在预热？）..固定装置的短跑……因此，马拉松比赛的热水迅速到达了固定装置。
1. I am trying to solve the long distance between the two areas of the house… does this sound like a good plan? Or should I use some sort of recirculating method instead between the two manifolds? we just dont want to wait forever for hot water at the kitchen sink…
2. what is the best heat pump water heater out there?
3.我真的很喜欢两个歧管的想法……我喜欢墙壁上没有连接的概念……3/8英寸对水槽和厕所有意义，而1/2”又对阵雨有意义吗？
I do have gas available… but for some reason i dont want to use it… except for my range, grill, and a fireplace… am going with a whole house mitsubishi eletric hvac system without gas as well.
anyway… thanks for the advice in advance…
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Replies
院长，
考虑到您的目标，您的计划是有道理的。选择最小的马拉松加热器（MODER 30245型号的容量为30加仑）。
当涉及到热泵热水器时，由Stiebel Eltron享有良好的声誉。
Since you are going all-electric, don't forget to install a PV array on your roof or in your yard (assuming that your local utility offers favorable net-metering agreements).
Thank you Martin,
我想我什至没有想到PV，但是我在其他任何地方都走了很远，是否有一篇好文章解释了PV的基础知识，以开始学习它吗？
Also, Since the largest line i will have coming off of the kitchen side manifold is 1/2... can I just run a 1/2 line to the small marathon that feeds that manifold? In essence it will hold less water that will be cooling down and take a shorter time from the heat pump water heater?
你为什么要在厕所里跑热水？
院长，
我要假设您只能在厕所里运行冷水。
您不妨将1/2英寸的油管运到厕所 - 它们会以这种方式填充。（“等待热水到达的问题”不适用于厕所。）
Most people are satisfied with the performance of 3/8" lines to lavatories -- but check with your local code inspector to see if that approach is legal in your jurisdiction. The longer the 3/8" line, and the more elbows, the less satisfying the flow rate... so this approach works best for shorter runs with few fittings.
Here are a couple of links to articles on PV systems:
An Introduction to Photovoltaic Systems
为光伏阵列腾出空间
ok, so all home runs from the manifold..so 1/2 to toilets, 1/2 to showers, 1/2 to cold side faucet, I guess the only decision if I am getting super ocd is whether or not to run 3/8 hot or 1/2 hot to sinks hot side. I guess i am obsessing over the fact that 3/8 will get the hot water there faster because there is less in the line... how can I calculate whether or not there will be enough pressure for the handsink with the 3/8?
院长，
For guidelines on 3/8-inch tubing, read what Gary Klein has to say:Inefficient Hot Water Piping Layouts Waste Hot Water.
对于主要的冷运行，我更喜欢1英寸的歧管和主要的热水热水器。额外的成本几乎是微不足道的，将消除压力/音量问题的潜力。
浸泡浴缸使用大量的水，通常您希望它能快速填充，因此3/4行很容易为热和冷而有合理的合理性。（检查您的水龙头流量，最低5 gpm）
3/8可以洗手，但是如果您想像厨房一样急忙装满水槽，那么1/2将更有用。
还有一个混合方法，其中一条线在每个区域/房间中运行到小歧管，而不是具有一百条线的单个歧管。
您可以在厨房侧使用一个小的无罐加热器来处理除浴缸和淋浴外，这些加热器可以通过与主人的单独热1/2英寸供电。
Pulling hot water from your heatpump on the master side would not be a good idea except on high volume usages. The water will never reach the second heater and end up being at room temperature resulting in a lot of wasted heat.
因此，用于厨房水槽，洗碗机，洗衣机，宾客水槽，宾客水槽的无电罐加热器。...您认为这比小马拉松更好吗？如果是这样，您可以推荐无电罐的型号吗？
院长，
The main disadvantage of point-of-use electric water heaters (or whole-house tankless electric water heaters) is that these appliances have huge amp-draw requirements. You'll probably need 200-amp electrical service to make this possible. Before you decide you want to do this, talk to an electrician.
Tank-style heaters have lower amperage requirements.
如果您决定使用使用点的电加热器 - 您可能想使用的原因 - Stiebel Eltron是一位知名的制造商。
有关此主题的更多信息，请参阅Point-of-Use Electric Tankless Water Heaters.