Energy demand calculation expert opinions?

Hello everyone,

for our new building (KfW-70) we received an energy demand calculation the other day. I wanted to hear some PROFESSIONAL OPINIONS on it.

Reference area 290m², actual living area 172m²
- Transmission heat loss=0.28 W/m²K (79% of the reference value, 71% of the energy saving ordinance)
- Heating energy demand=38 kWh/m²a
- Primary energy demand=40.0 kWh/m²a (60% of the reference value)
- Total final energy demand=15.4 kWh/m²a
- Controlled residential ventilation with WRG 90%
- Air heat pump

That means with around 5000 kWh / year we should be well within the calculation, so less than 30 kWh / m² of actual living area per year. These values seem quite good to me for a "non-passive house"...

What does the expert community think? :-)

Hello,

...That means with around 5000 kWh / year we should be fine according to calculations, so less than 30 kWh / m² of actual living space per year.

Unfortunately, that will probably not come true.;) The values in the Energy Saving Ordinance are purely comparative values and therefore neither suitable for heating system sizing nor for assessing the future actual energy demand or consumption.

Best regards.