迷你底漆是否足够，还是我们也需要地板加热？
Thomas Kaempfen|Posted inEnergy Efficiency and Durabilityon
我们正在多伦多改造一家旧平房。它将是带有代码R值的气密。我们将全电动进行无管冷却和加热。对于加热，迷你切片是否足够？还是我们需要像水力地板这样的备用加热？
成品房屋将有两层，约3000平方英尺加地下室。通风将是HRV。
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Thomas,
无管的迷你底或管道小插图应正常工作。
I'm not sure what you mean by "backup heating." If you are worried about staying warm during a power outage, installing a hydronic heating system won't help -- because a hydronic heating system requires electricity to operate.
如果您想要在停电期间运行的备用加热系统，则应安装木炉。
多伦多的 +1F/-17C 99％的外部设计温度和较低的小型切片有许多迷你切片。只要您咨询扩展的温度容量表并在该温度下选择一些边距的东西，即使在罕见的日子为-20C甚至-25C及以后的罕见日子里，也不需要备份。Fujitsu -__ RLS3H系列或三菱-FH__NA系列的均在-25C上发布了能力。对于管道单位，富士通-__ rlFCD的评分为-20C。与寒冷的气候多裂压缩机结婚时，三菱MVZ系列空气处理程序也这样做。它们仍然在较低的温度下运行，比延长温度容量表中指示的最低温度。
因此，您仍然必须做功课并计算负载以使其正确。过度尺寸过多会导致效率降低，这对于那些坚持每个房间中无管头的人来说，这是一个普遍的问题。
To Martin Holladay,
我们大多不担心停电，我们担心天气太冷的日子，以至于微型底漆的功能不足以充分加热房屋。（尽管木炉的想法具有很大的魅力。）
另外，地下室将有一个卧室和一个娱乐室，我们希望确保它们在非常寒冷的夜晚会温暖。
Thomas,
In Toronto, you should be able to design a minisplit system that doesn't need any backup equipment for cold nights.
But if you are worried -- some users of minisplits are -- you can buy a portable electric space heater for $50 or $100. Almost everyone who buys this type of space heater to supplement a minisplit never uses it. But sometimes people need to buy something not because it's necessary, but to relieve their anxiety.
我参与了少数几年前的一个比代码米的改造项目更好，这是三下三菱的加热。今年早些时候，室外温度下降到-27°C，几天没有上升到-15C（局部99％的外部设计温度）。尽管最低的温度是指定的输出为-25C，但该房屋毫无问题地与-27C保持热载。这并不罕见。
如果您对99％的外部设计温度负载的尺寸正确尺寸，并有一点边距，即使在冷扣中，也无需备份。
感谢您的所有有用的答案。还有一个问题：
木炉子上的烟道会影响房屋信封吗？冷空气可以通过它泄漏回房屋吗？有些人对气密房屋发生火灾的风险表示担忧，这是真正的担心吗？
Thomas,
Q. "Would the flue from a wood stove affect the house envelope?"
A. Of course. (Any feature that penetrates the envelope affects the envelope.) A chimney -- whether brick or stainless steel -- represents a thermal bridge through the envelope, and that thermal bridge degrades the performance of the roof insulation. Moreover, a wood stove chimney can contribute to ice dam formation. If the chimney is installed properly, however, air leakage near the chimney can be almost eliminated. (However, there will always be some air leakage up the flue.)
Q. "Could cold air leak back into the house through it?"
答：是的，当房屋被压下时，这可能会发生（例如，当功能强大的射程风扇运行时。扇子。
Q. "Some people express concerns about risk of fire in airtight homes. Is that a real worry?"
A. I've never heard of that. I can't think of a reason why the fire risk would be higher in an airtight home.