Heating combination okay?

There is a brine heat pump with an integrated hot water storage tank of about 150-200 liters. This is usually enough for a family of four if there are no constant shower users and no [Rechtsanwältin-Dance DK] present. In an emergency, the heating element can also heat directly, for example if there are guests or similar. It is definitely cheaper and more efficient than an additional buffer tank or instantaneous water heater.

But then you only have a water temperature of 45 degrees?

Efficient is under 50, possible is often over 60 degrees.

Hello Michael,

when you read through the posts as in your case, a considerable confusion arises. You probably don’t even know which way is up anymore. That’s why I want to try to bring some clarity.

For the installation or renovation of a heating system, the heating load according to DIN 12831 for the building is important. This can be determined by a qualified energy consultant. From your information, I conclude that it is a new building. If that is the case, the energy performance certificate must be submitted with the building application. From the energy performance certificate, the heating load can at least be approximately derived.

The combination of several heat generators is technically not a problem; a good heating engineer should actually be able to manage that well.

I don’t find your approach bad; the goal is to maximize the use of renewable energy sources, i.e., to become independent. Theoretically good, but practically more difficult to implement, on the one hand, because renewable energy sources are available when you don’t need them (summer = electricity and hot water, winter?). This alone already argues in favor of appropriate storage. On the other hand, we’re talking about quite an investment volume: photovoltaics, solar thermal, controlled residential ventilation, heat recovery, ground-source heat pump plus storage! Perhaps one should proceed by implementing part of it and securing options for the other, e.g., by making some preparations for extending the system through empty conduits, areas, etc., as suggested by Bieber0815.

As already mentioned, I do not consider OLEDA222’s opinion to be correct. Because if a thermal solar system is to be installed, a buffer storage tank must be present. But please not one in the screed as proposed by “BeHaElJa.”

I consider the combination of a biomass stove (firewood or pellets) with water jackets combined with a thermal solar system and a natural gas boiler as a peak load in winter to be an ecological and economical bullseye. In the transitional periods (spring, autumn), the solar system will support the heating; in summer you will have no consumption (costs) because the sun doesn’t send a bill! The natural gas boiler will ensure in winter that it never gets cold if the stove is not fired up because you do not feel like it or are on vacation.

Best regards, Erik

I completely agree with you that a storage tank is necessary for a thermal solar system.

However, I consider the solar system to be superfluous in most cases.

Please specify the approximate price for the variant you suggested, including all necessary piping, buffer storage, etc., but excluding the floor heating that is required anyway.

4-person household, 6 kW heating load (also gladly for 8 or 10 kW if that makes more sense), including hot water. -12 AT.

So I did some research..

Brine heat pump including a 200-liter hot water storage tank would then basically manage without a separate heating buffer tank.

How is it controlled? Primarily the hot water and secondarily the heating?

Added to that, photovoltaics on the roof and a tile stove in the living area, I think this is the best way for me and it's still reasonably affordable.