Hello everyone,
I would like to gather information about different heating systems. I am a complete beginner and work in an office environment, so unfortunately, I have very little prior knowledge.
We have decided to build a single-family house using timber frame construction. The options we are considering are:
Gas condensing boiler and ventilation system
Air-to-water heat pump with ventilation function
Air-to-water heat pump with outdoor or indoor installation
and air-to-air heat pump
The only information we received was that an air-to-water heat pump results in very low electricity costs. The air-to-air heat pump was heavily promoted by Bien-Zenker because it can cool rooms very effectively, which you would notice. Furthermore, for this company, the cooling function is only enabled in a house with a 55 energy standard. For a 40 standard, you have to include a photovoltaic system; otherwise, the function is locked. In a 40 plus house, however, it is enabled again.
We are planning an Efficiency House 40 with appropriate heating and cooling technology. Which option makes the most sense there?
150 m² (1600 sq ft) single-family house, 600 m² (6500 sq ft) plot.
I would like to gather information about different heating systems. I am a complete beginner and work in an office environment, so unfortunately, I have very little prior knowledge.
We have decided to build a single-family house using timber frame construction. The options we are considering are:
Gas condensing boiler and ventilation system
Air-to-water heat pump with ventilation function
Air-to-water heat pump with outdoor or indoor installation
and air-to-air heat pump
The only information we received was that an air-to-water heat pump results in very low electricity costs. The air-to-air heat pump was heavily promoted by Bien-Zenker because it can cool rooms very effectively, which you would notice. Furthermore, for this company, the cooling function is only enabled in a house with a 55 energy standard. For a 40 standard, you have to include a photovoltaic system; otherwise, the function is locked. In a 40 plus house, however, it is enabled again.
We are planning an Efficiency House 40 with appropriate heating and cooling technology. Which option makes the most sense there?
150 m² (1600 sq ft) single-family house, 600 m² (6500 sq ft) plot.
N
nordanney26 Jun 2020 14:56Ybias78 schrieb:
The question remains whether an air-to-water heat pump combined with a photovoltaic system is worthwhile.These are two separate questions and should not be linked. 1. Is an air-to-water heat pump worthwhile? ==> Answer: yes
2. Is photovoltaics worthwhile? ==> Answer: yes
BUT: A photovoltaic system also makes sense when combined with gas or oil (in existing buildings). Furthermore, gas alone can also be sensible (usually with solar thermal systems for energy-saving regulations) without photovoltaics.
nordanney schrieb:
These are two separate questions that should not be combined.
1. Is an air-to-water heat pump a good choice? ==> Answer: yes
2. Is photovoltaic (solar panels) a good choice? ==> Answer: yes
BUT: Photovoltaics also make sense with gas or oil heating systems (existing installations). Furthermore, gas alone can be reasonable (usually with solar thermal systems to meet energy efficiency regulations) without photovoltaics. Isn't it more likely that the ongoing costs for an air-to-water heat pump plus a photovoltaic system are higher than for a gas boiler combined with photovoltaics?
N
nordanney26 Jun 2020 15:05Ybias78 schrieb:
Isn’t it more likely that the ongoing costs of an air-to-water heat pump plus photovoltaic system are higher than with a gas boiler plus photovoltaic system? Why? What did you calculate?
Don’t always fixate on the combination with the photovoltaic system. It doesn’t affect your heating costs.
nordanney schrieb:
Why? What exactly did you calculate?
Don’t get stuck on the combination with the photovoltaic system. It doesn’t change your heating costs.I know they don’t decrease. The point is that a gas boiler uses gas, and an air-to-water heat pump uses electricity. Electricity is much more expensive than gas. But yes, you’re right. I need to run the numbers and compare.
N
nordanney26 Jun 2020 15:24Ybias78 schrieb:
The point is that a gas boiler uses gas, and an air-to-water heat pump uses electricity. So? You’re comparing apples and oranges.
If you have a certain heating energy demand, you can cover it using different energy sources.
For that, you have the COP for heat pumps, but on the other hand, possibly high connection costs for the gas line. You really need to know how much heating energy your house requires (don’t confuse this with the vague numbers from the energy performance certificate) and then decide which “system” produces the energy you need.
S
Strahleman26 Jun 2020 18:11Ybias78 schrieb:
I know they don't decrease. The point is that a gas boiler uses gas, and an air-to-water heat pump uses electricity. Electricity is much more expensive than gas. But yes, you're right. I need to do the calculations and compare. Not exactly, electricity is more expensive, but you don’t need to use electricity exactly 1:1 for the required heating demand. With a heat pump, you have the seasonal performance factor (SPF) as a guideline. This means you only need a fraction of the electricity to generate the required heat output. With gas, you basically put in as much gas as the heat you need. For a heat pump, it’s important to have an optimized and properly sized heating surface layout to save on heating costs. That’s less critical with gas.
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