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luisa&felix9 Apr 2011 21:11Hello,
My wife and I want to make our dream of owning a house come true this year.
Like many others, we are looking for a good heating system with relatively reasonable running costs.
Our household: three people who shower every morning and evening, and my wife takes a bath once a week.
The plan is to have underfloor heating throughout the entire house, operated with warm water.
My idea for heating:
A gas condensing boiler with solar support for hot water
A fireplace that, when used, also heats the water in the boiler
Is this a sensible approach, or would it be better to use geothermal energy with surface heating instead?
I look forward to many answers 🙂 Thank you very much!
My wife and I want to make our dream of owning a house come true this year.
Like many others, we are looking for a good heating system with relatively reasonable running costs.
Our household: three people who shower every morning and evening, and my wife takes a bath once a week.
The plan is to have underfloor heating throughout the entire house, operated with warm water.
My idea for heating:
A gas condensing boiler with solar support for hot water
A fireplace that, when used, also heats the water in the boiler
Is this a sensible approach, or would it be better to use geothermal energy with surface heating instead?
I look forward to many answers 🙂 Thank you very much!
Hello,
Without the appropriate basics, this cannot be reliably answered. The fact is that, in many cases, air source heat pumps, gas condensing boilers, and ground source (brine) heat pumps prove to be suitable. Unfortunately, gas condensing boilers have the disadvantage that, for primary energy reasons, the usually uneconomical solar system must be purchased as well, unless compensatory measures or exemptions are applied.
Ground source systems tend to be more expensive due to the costs of additional ground loop installation, but they are necessary under certain conditions. Air source heat pumps are well suited for many applications, provided the circumstances are right and one uses modular units of the latest generation and avoids combined systems, which are often used in general contractor / main contractor projects.
Best regards.
luisa&felix schrieb:Whether this even makes sense should be checked beforehand. https://www.hausbau-forum.de/allgemeine-fragen-haustechnik-okologie/3841-heizungskonzept-bitte-um-erfahungsbericht.html#post23778
...Gas condensing boiler with solar support for domestic hot water
Fireplace which, when used, also heats the water in the boiler
luisa&felix schrieb:
...Is this a sensible option or would it be better to use ground source heat from surface collectors?
Without the appropriate basics, this cannot be reliably answered. The fact is that, in many cases, air source heat pumps, gas condensing boilers, and ground source (brine) heat pumps prove to be suitable. Unfortunately, gas condensing boilers have the disadvantage that, for primary energy reasons, the usually uneconomical solar system must be purchased as well, unless compensatory measures or exemptions are applied.
Ground source systems tend to be more expensive due to the costs of additional ground loop installation, but they are necessary under certain conditions. Air source heat pumps are well suited for many applications, provided the circumstances are right and one uses modular units of the latest generation and avoids combined systems, which are often used in general contractor / main contractor projects.
Best regards.
Hello Luisa and Felix,
A dream that can come true and should not turn into a nightmare! The forum is certainly a good idea to gather information in advance. Your question suggests that you are still at the very beginning of making your dream a reality. Therefore, here are some general points that can later be specified through further questions in the forum.
As it sounds, you are planning a new build! For three people, you will need about 120–180 liters (31–48 gallons) of hot water per day, which should be supplied by a suitable storage tank. Depending on the heating system you choose later, there are different types (combi systems, stratified storage, etc.) and different sizes will be required.
By choosing underfloor heating, you have intuitively made the right decision. This provides you with large heat-emitting surfaces that allow the heating system to operate at a low system temperature. The lower the temperature of the heating water needs to be, the lower the heating costs will be. This is the basis for operating the house with relatively moderate running costs.
Regarding the heating system, a modern gas boiler with condensing technology is certainly a good choice. By utilizing the heat from condensation of water vapor in the exhaust gases, the efficiency is significantly increased (theoretically up to 111% for gas). This saves gas and therefore money, while also protecting the environment through lower CO2 emissions and reduced acidic exhaust particles. The low system temperature and consequently low return temperature of the heating water enhance these condensing effects particularly well.
When it comes to solar water heating and heating support, opinions vary. It is certainly a sensible contribution to reducing energy consumption and thus CO2 emissions. Especially in today’s discussions about the energy transition, it is clear that avoiding the use of electricity for water heating whenever possible is necessary. However, for a new residential building, including a solar component is not always mandatory. If the current energy saving regulations (energy saving ordinance / building energy regulations) are undercut by 30%, it may be omitted. Fundamentally, every home builder is advised to comply with the 2009 energy saving ordinance with a good margin, as a new, stricter version will come into effect in 2012 (in just a few months).
Best regards
Erik
A dream that can come true and should not turn into a nightmare! The forum is certainly a good idea to gather information in advance. Your question suggests that you are still at the very beginning of making your dream a reality. Therefore, here are some general points that can later be specified through further questions in the forum.
As it sounds, you are planning a new build! For three people, you will need about 120–180 liters (31–48 gallons) of hot water per day, which should be supplied by a suitable storage tank. Depending on the heating system you choose later, there are different types (combi systems, stratified storage, etc.) and different sizes will be required.
By choosing underfloor heating, you have intuitively made the right decision. This provides you with large heat-emitting surfaces that allow the heating system to operate at a low system temperature. The lower the temperature of the heating water needs to be, the lower the heating costs will be. This is the basis for operating the house with relatively moderate running costs.
Regarding the heating system, a modern gas boiler with condensing technology is certainly a good choice. By utilizing the heat from condensation of water vapor in the exhaust gases, the efficiency is significantly increased (theoretically up to 111% for gas). This saves gas and therefore money, while also protecting the environment through lower CO2 emissions and reduced acidic exhaust particles. The low system temperature and consequently low return temperature of the heating water enhance these condensing effects particularly well.
When it comes to solar water heating and heating support, opinions vary. It is certainly a sensible contribution to reducing energy consumption and thus CO2 emissions. Especially in today’s discussions about the energy transition, it is clear that avoiding the use of electricity for water heating whenever possible is necessary. However, for a new residential building, including a solar component is not always mandatory. If the current energy saving regulations (energy saving ordinance / building energy regulations) are undercut by 30%, it may be omitted. Fundamentally, every home builder is advised to comply with the 2009 energy saving ordinance with a good margin, as a new, stricter version will come into effect in 2012 (in just a few months).
Best regards
Erik
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