Electric or Propane Boiler Recommendations for Radiant?
Hi All,
我搜索，但在电锅炉选择中没有找到任何明确的赢家。
With technology evolving I thought I’d ask to see if anyone has actual positive experience with an electric boiler?
如果可能，我想远离丙烷，但我也是一个实用主义者，所以如果需要，可以调整。我问我当地的建筑师关于热泵煮沸我读过，但他感觉到我们的冬季气候不建议。
Background:
– Western Montana new construction (Bitterroot Valley)
– Frost walls with slab
- 底层楼层连接est 1200sf（不是所有的窗户，但你会得到gist）
– 2nd floor will be above the bedroom/garage that includes: office, bedroom and 1br guest suite for long term guests/family. Plan to block off and have separate heating zone for all but the office in normal use to minimize heating required.
– HVAC plan – hydronic radiant with a mini split in great room building for better temp control flexibility and AC on handful of hot summer days.
– Backup heat of mini split and zc wood burning fireplace
– Electricity rates = .068 – .076 per kwh (mostly hydro powered)
– Propane rates = $2.3-$2.8/g when filling large tanks
- 丙烷罐已经计划：炉灶和备用发电机的燃料，因为它比燃气/柴油更好地存储。
- 将专注于绝缘和建筑信封，但...山景（视频附加）从SW到NW令人惊叹，所以我将吮吸它并牺牲一些热封享受它们。
Thank you,
Steve
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Replies
Quick opinion (assuming well insulated/air sealed envelope).
Cheap way: Electric resistance radiant floor heating. Simple no moving parts.
Deluxe way: Ground source heat pump water-to-water hydronic radiant heat.
Note that with those cheap electric rates the deluxe way would likely have a payback of 50 years or more (just guessing).
Maybe best bang for buck: Triple pane windows and curtains for night time.
电阻电气显着（33％）在较低速率场景下便宜，甚至更高的速率场景，因此用于中央热的挖掘丙烷是一个简单的决定。现在：在一个新的房屋中是辐射的覆盖层，绝缘水平较高？这是不那么经济，更有个性化的，许多GBA文章已经写了一篇关于它的，通常反对地板液体系统（特别是板坯）。如果辐射楼层是必须的，那么电锅炉与电垫是下一个决定：电动管道让您可以切换到道路上的空气热水泵，但为相同的初始效率将更昂贵。它们还提供零冷却，因此您可以加倍这些成本。除了使用导管和尺度非常糟糕的尺寸时，Hydronics通常更昂贵。
操作和安装的最便宜选项将是空气源热泵，管道或导管或混合。与电锅炉/垫相比，运行约66％，比丙烷便宜〜80％。您的建筑师误导，它们将在您的气候中有零问题，并与电/丙烷备份系统轻松配对。
Thanks for the input guys.
因此，如果电动锅炉，您是否知道任何在长期体验用户中强烈推荐的品牌？
Radiant or not?
是的，我肯定会阅读关于它的研究和意见，并倾向于它，因为我有点厌倦了导管中央HVAC的噪音和微风。我以前在Norcal中进行了一个空气源热泵。此外，从纯粹反馈的角度来看，任何我与谁拥有或拥有辐射加热地板的人都爱他们。除了数值计算之外，我认为有一些东西的意见，支持他们的生活质量。
没有横向升起，但肯定会朝着它倾斜。
Local architect is totally good with air source heat pump for hvac (with propane backup I believe) just didn't recommend for the hyrdronic radiant boiler.
From what you're both saying and another online propane v electric calculator I did, it seems I can at least rule out propane as long I can find a well sized, reliable electric boiler for my application.
Does anyone have good experience with a heat pump water heater or hydronic heater in cold climates?
The fact your electricity is so cheap, anything propane is a non starter unless you regularly need a backup generator.
If you must have floor heat, your best option is what Denis recommends. Standard resistance mat.
几个世纪以来，测量来自ASHP或GSHP的热量的任何水的ROI。
If you want slightly lower operating cost is combine the resistance floor heat with ducted heat pump. The idea is to provide heated areas where there is high foot traffic but not the full slab, this way the heated areas can run warmer. The floor heat would also only provide part of the heat and only during daylight hours whereas the heat pump would provide supplement heat during the day and all the heat during the night.
Add in a fancy ERV, you are still well under $10k in materials and a much simpler install and lower operating cost.
Cold climate heat pumps have come a long way, no need for backup heat even if your temperatures dip well bellow 0F.