Hello everyone,
A house was purchased 1.5 years ago. The heating and domestic hot water system consists of a solar panel system plus a water-bearing wood stove. A 1000L (265 gallon) water storage tank handles the heat storage.
Basically, this setup works well. However, on cold days without sun, if no one is at home to operate the stove, the water tank can only be heated using the electric heating element.
To save on electricity costs, we are now considering adding an additional heating system to cover those days.
Currently, a small air-source heat pump or a gas boiler (gas supply is available at the street) are being considered.
Who has experience regarding the effort, costs, and benefits of these options?
An initial offer for the heat pump is already available. Model:
OCHSNER EUROPA MINI IWP
Best regards
A house was purchased 1.5 years ago. The heating and domestic hot water system consists of a solar panel system plus a water-bearing wood stove. A 1000L (265 gallon) water storage tank handles the heat storage.
Basically, this setup works well. However, on cold days without sun, if no one is at home to operate the stove, the water tank can only be heated using the electric heating element.
To save on electricity costs, we are now considering adding an additional heating system to cover those days.
Currently, a small air-source heat pump or a gas boiler (gas supply is available at the street) are being considered.
Who has experience regarding the effort, costs, and benefits of these options?
An initial offer for the heat pump is already available. Model:
OCHSNER EUROPA MINI IWP
Best regards
T
T_im_Norden27 Aug 2020 13:00Without further information, this cannot be answered.
How much higher are the electricity costs due to the heating cartridge?
How old is the house?
What is the heating load?
Pellet stove?
Current flow temperature?
How much higher are the electricity costs due to the heating cartridge?
How old is the house?
What is the heating load?
Pellet stove?
Current flow temperature?
N
neo-sciliar27 Aug 2020 14:41Joedreck schrieb:
Ideally, it would feed directly into the underfloor heating rather than the buffer tank to maintain at least a basic temperature.I have read this several times now and don’t understand it. Our setup is exactly like that: a multi-functional storage tank heated by a stove, solar panels, and a heat pump. It works. Yes, the control system required quite a bit of practical experience.
The heat pump alone connected to the buffer tank is pointless because it just heats the buffer. But once it’s warm, the heat pump can maintain the temperature... whether it balances a temperature difference (Delta T) in the buffer or in the underfloor heating should not matter to it.
The problem is controlling the flow temperature when connecting the heat pump directly to the underfloor heating. The heat pump is the only “intelligent” component in the system that can calculate and regulate the flow temperature. If you separate it from the buffer tank, you might load the buffer heavily with heat (from the stove or solar), but then who controls the distribution into the underfloor heating?
N
neo-sciliar27 Aug 2020 15:26Joedreck schrieb:
Because you lose energy through the buffer, for example. From a control technology perspective, the intended system is (in my opinion) a nightmare. I would stay within the heat pump area. As mentioned, it is a developed environment. I wouldn’t build it new (anymore) either. But it works, and works well (just yesterday I received a bill of 300€ for electricity costs for 1 year, with 220 m² (2370 sq ft) of heated area).
N
neo-sciliar27 Aug 2020 18:06Joedreck schrieb:
It is what it is. You don’t need to justify it. The question is, what really makes sense as an addition given the low annual costs. Two different topics. The current situation won’t change. We are building new, and that looks different.
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