ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Chase1543 schrieb:

It’s a KfW40+ solid construction.
What can I say? I did some research myself and experimented a lot. At the beginning, there was a lead time with a temperature of 31°C (88°F). That used a lot of electricity. Now I am able to reach the target temperature everywhere except in two rooms. But I will try the previous tip for those.
The heated area is about 360m² (3,875 sq ft), and 21°C (70°F) is set in all rooms.
To be fair about the electricity consumption, no hot water was used!
Unfortunately, I don’t know how to create a file. I’ve attached some photos:

I’m pleasantly surprised. What is the composition of the building envelope? KfW40+ with a basement isn’t monolithic construction, right?

@Chase1543 how long has it been running now with this low supply temperature?
What temperature are the two cold rooms at?

A quick question for the experts: I recently measured the floor temperature, which is 25°C (77°F), with the room temperature at 22°C (72°F) and the flow temperature set to 30°C (86°F). From your perspective, are these values good, or should the flow temperature be set a bit lower?

The temperature is comfortable in all rooms. The flow rate is set to maximum in all rooms except the living room, where it is at one-third per heating circuit; there are three heating circuits here.

Yesterday’s electricity consumption was about 18 kWh, of which 3 kWh were for hot water. The average outside temperature over 24 hours was 3°C (37°F).

Malz1902 schrieb:

A quick question for the experts: I measured the floor temperature the other day, it’s 25°C (77°F), room temperature is 22°C (72°F), and the supply temperature is set to 30°C (86°F). From your point of view, are these values good, or should the supply temperature be set a bit lower?
Temperature is fine in all rooms. Flow rate is set to maximum in all rooms except the living room, where it is set to 1/3 per heating circuit; there are 3 heating circuits here.

Electricity consumption yesterday was about 18 kWh, with 3 kWh used for hot water. Outdoor temperature averaged 3°C (37°F) over 24 hours.

How long is the cycling time per heating phase and how many heating cycles are there?
Why is the living room throttled as the main living area?
There is not enough information to make an assessment.

So, the 4K hysteresis is really not ideal in terms of efficiency. House consumption is 15.4 kWh (15.4 kWh), with about 10 kWh (10 kWh) used for heating and hot water.

Zaba12 schrieb:

I’ve read this several times, but I don’t quite understand the statement. I can only either gain or lose something. I can’t lose anything because I can’t gain it by self-consumption and vice versa. Anything I feed into the grid I can’t consume myself, so I’m not losing any “free kWhs.”

There are no free kWh. Have you ever calculated what 1 kWh from your storage system actually costs you? You definitely have the feed-in tariff from the Renewable Energy Act for every kWh you produce, and no one can take that away from you.

Regarding the 4 K hysteresis, in our case it would either be freezing cold or completely overheated. In any new build, anything over 2 K already significantly affects comfort.

I would recommend a balance of energy efficiency, reasonable system operation, and comfort. Comfort is our top priority.