ᐅ Efficient and Cost-Effective Heating System for New Construction
Created on: 19 Dec 2023 16:39
W
Wanted2b
Hello everyone,
My name is Tobias, and my wife and I want to build a house with our two children.
I need your support with planning the heating and energy systems in the house and would appreciate a discussion. The house is still in the planning stage, meaning the floor plan is currently being developed. However, I want to consider energy efficiency early on. I am thinking about the roof shape and how the house is positioned on the plot. I lack experience and knowledge about what makes sense and what funding options are available.
Here are the key details:
The plot is located in NRW in Nümbrecht. Attached is a picture showing the orientation.
We are building a two-story house, with a roof pitch between 0° and 20°.
It will be a Passive House standard 40 (PH40) with timber frame construction. The provider is not yet decided.
We want underfloor heating.
The house will be about 150–160 square meters (1,615–1,722 square feet), without a basement.
There is the possibility to connect to district heating provided by the municipality.
The goal is to be as economical as possible but also efficient, considering future developments to ensure some degree of independence.
Currently, there is no electric vehicle, but that might change (ideally powered by our own photovoltaic system).
What would you recommend?
I am grateful for any help.
My name is Tobias, and my wife and I want to build a house with our two children.
I need your support with planning the heating and energy systems in the house and would appreciate a discussion. The house is still in the planning stage, meaning the floor plan is currently being developed. However, I want to consider energy efficiency early on. I am thinking about the roof shape and how the house is positioned on the plot. I lack experience and knowledge about what makes sense and what funding options are available.
Here are the key details:
The plot is located in NRW in Nümbrecht. Attached is a picture showing the orientation.
We are building a two-story house, with a roof pitch between 0° and 20°.
It will be a Passive House standard 40 (PH40) with timber frame construction. The provider is not yet decided.
We want underfloor heating.
The house will be about 150–160 square meters (1,615–1,722 square feet), without a basement.
There is the possibility to connect to district heating provided by the municipality.
The goal is to be as economical as possible but also efficient, considering future developments to ensure some degree of independence.
Currently, there is no electric vehicle, but that might change (ideally powered by our own photovoltaic system).
What would you recommend?
- An air-to-water heat pump? Or a ground-source (brine) heat pump?
- With or without a buffer tank or layered storage?
- With or without photovoltaic panels? If yes, what size makes sense?
- With or without a battery storage system? If yes, what size makes sense?
- With or without solar thermal panels on the roof? If yes, what size makes sense?
- What type of roof makes the most sense?
- If using photovoltaic or solar thermal—what roof shape optimizes solar energy capture?
- How do these combinations compare in terms of price-performance ratio? Do these “add-ons” only add a few percent in efficiency compared to a plain air-to-water heat pump with underfloor heating, or are they meaningful and cost-effective upgrades?
I am grateful for any help.
J
jens.knoedel20 Dec 2023 23:46Wanted2b schrieb:
I’ve also heard that it’s possible to insulate the house much more and maybe even do without a heat pump altogether? That would be a passive house. It’s not really about the construction method, but if you build accordingly, you can manage with just an air-to-air heat pump as supplementary heating. Then you might not need a heat pump at all.
BUT: You may have to invest tens of thousands of dollars more. Whether it’s worth it? You need to calculate and work it out. What looks good on paper isn’t always the same in reality.
B
Buchsbaum21 Dec 2023 10:33WilderSueden schrieb:
Funny... recently, a certain Buchsbaum mentioned completely different numbers: https://www.hausbau-forum.de/threads/warum-gehen-die-baupreise-nicht-runter.45529/post-641652 However, the article you linked was about district heating. That is different from local heating.
And just to clarify for you again:
Local heating = local
District heating = district.
This results in significantly different costs.
W
WilderSueden21 Dec 2023 11:06It was about the house connection. And it doesn’t matter to it whether the heat is produced 2km (1.2 miles) or 20km (12.4 miles) away.
By the way, I have just received information that there is no option for district heating in our area.
The local energy provider only offers a heat pump tariff and/or a heat pump tariff plus service for the heat pump, basically a subscription where they supply and maintain the unit.
So currently, our plan for the new build is:
Photovoltaic panels on the pitched roof
Air-to-air heat pump without a buffer tank
How does hot water work in this setup – do we need a second heat pump, or can the same heat pump handle it? What are the advantages and disadvantages?
And regarding individual room controllers (IRCs) – My wife wants, for example, the bathroom a bit warmer and the bedroom cooler, but I keep reading that this might also be achievable without extra technology by using thermal and hydraulic balancing?
The local energy provider only offers a heat pump tariff and/or a heat pump tariff plus service for the heat pump, basically a subscription where they supply and maintain the unit.
So currently, our plan for the new build is:
Photovoltaic panels on the pitched roof
Air-to-air heat pump without a buffer tank
How does hot water work in this setup – do we need a second heat pump, or can the same heat pump handle it? What are the advantages and disadvantages?
And regarding individual room controllers (IRCs) – My wife wants, for example, the bathroom a bit warmer and the bedroom cooler, but I keep reading that this might also be achievable without extra technology by using thermal and hydraulic balancing?
J
jens.knoedel19 Jan 2024 21:52Wanted2b schrieb:
Air-to-air heat pump Are you sure? That’s basically an air conditioner. No underfloor heating.
Wanted2b schrieb:
How does it work with the hot water – a separate second heat pump or can the same heat pump handle that? A air-to-water heat pump handles that directly.
Wanted2b schrieb:
For example, my wife wants the bathroom a bit warmer/bedroom cooler, but I keep reading that this can maybe be achieved without extra technology through thermal and hydraulic balancing? You can achieve some difference if you plan the heating accordingly and keep the doors in the house closed (which I find uncomfortable). But you probably won’t get more than 2-3 degrees.
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