Cost of electric screed heating

Hello everyone,

We are building with a gas boiler, but unfortunately our supplier is not coming through, meaning I don’t know when my gas line will arrive. In two weeks I can start my heating program. Now we are wondering, to not lose too much time, whether to operate the screed with such an electric heater.

Now the big question is, roughly how many kWh does that thing draw? The living area is about 165 sqm.

Have the same house size. In total, you will have to budget about 1200 euros for 2 weeks of heating program.

"Calculate Required Heating Capacity
First, you should clarify how much output your heating system actually needs. You can easily calculate the heating capacity!
The basis for this is the performance data of the heating system. These consist of the following factors:
the heating flow temperature

[*]the heating return temperature
[*]the room temperature

Older central heating systems still operate with high flow temperatures of 80 °C or 90 °C. According to today's thermal protection regulation, heating systems are designed in the low-temperature range.

The lower the flow temperature, the larger the room radiator must be designed.
Use a classic rule of thumb to determine this. It’s that simple:

[*]Determine room size (e.g. 20 sqm)
[*]Choose desired room temperature
[*]Read heating capacity according to house construction year (W/sqm) from the table below

Room size x heating capacity (W/sqm) = required heating capacity of your room. Rule of thumb
Desired room temperature 18 °C 20 °C 24 °C
House construction year up to 1982 111.6 W/m² 121.6 W/m² 141.7 W/m²
1983 to 1994 90.0 W/m² 99.2 W/m² 115.9 W/m²
from 1995 73.9 W/m² 80.8 W/m² 94.6 W/m²
Example calculation:

Bathroom House construction year 1993 = 20 sqm
Heating capacity (W/sqm) (at room temperature 24°C) = 115.9 W/sqm
20 sqm x 115.9 W/sqm = 2,318 W

We recommend calculating with at least 100 W/sqm.

Then: Select the appropriate flat radiator
To select the radiator according to the determined heating capacity, the following factors must be considered:

[*]The determined required heating capacity (see above)
[*]The height of the flow temperature (boiler setting)
[*]Structural restrictions (e.g. window recess)
[*]The size of the radiator (surface, radiator type)
[*]Take or order the radiator

The following tables provide information about the correct selection of your flat radiator:"

Depending on the duration, €1500-2500 plus the device rental and installation. Are you still using the construction power or do you already have the correct meter with a selectable tariff? If construction power, then another 40-50% more.