36.5 high perforated brick W12 sufficient without additional insulation?

Hello,

is it possible to meet today's standards with a 36.5 W12 hollow brick without additional insulation?

The plan is a city villa with 192 m2, air-water heat pump with ventilation system.

If not, which bricks are used nowadays if you want to build without additional insulation?

No KFW funds will be applied for.

Thank you in advance.

You can still build with a wall thickness of 36.5 cm today. There are variants of the bricks in different compressive strength classes and such, where sometimes one of two variants meets the requirements, for example, the fat level KfW55, and the other only the legal minimum. If you are not flexible in this regard, you can use aerated concrete instead of the porous brick, or switch to a wall thickness of 42.5 cm. Keep in mind my brick mantra, to choose the brick based on the builder and not the other way around.

The specified stone has a U-value of 0.30. I dare to doubt that this is sufficient. Nevertheless, there are stones with this material thickness that should be sufficient or even meet KfW standards. A 365er T9 should be heading in the right direction. Or something filled.

The named brick has a U-value of 0.30. I dare to doubt that this is sufficient. Nevertheless, there are bricks with this material thickness that should be sufficient or even meet KfW standards. A 365 T9 is likely to go in the right direction. Or something filled.

This is what our house will be built with. Poroton T09d 36.5 cm. Sufficient for KfW 55. And that only with an air-to-water heat pump. However, the windows are passive house windows, since they are not unimportant for KfW 55.

We decided on a ground source heat pump + controlled residential ventilation.

This is how our house is being built. Poroton T09d 36.5 cm. Sufficient for kfw 55. And that only with an air-water heat pump. However, the windows are passive house windows, as they are not unimportant for kfw 55.

There are two key figures that play a significant role.
One is heat loss. This can be controlled through the insulation properties of the building envelope, e.g. choice of bricks, insulation thicknesses, glazing. It is important to find an economical balance here. Whether "passive house windows" are necessary or not is answered by the energy consultant. However, they are certainly not absolutely required.
The other is energy demand per square meter of living space. An air-water heat pump has no significant disadvantages compared to a ground-source heat pump and is more than sufficient on its own to meet the requirements. Controlled residential ventilation with heat recovery is included in the calculations and the presence of photovoltaics also has a slightly positive effect.

There are two key figures that play a significant role. One is heat loss. This can be controlled through the insulation properties of the building envelope, e.g. choice of stone, insulation thickness, glazing. It is important to find an economical balance here. Whether "passive house windows" are necessary or not is answered by the energy consultant. However, they are certainly not mandatory. The other is energy demand per sqm of living space. An air-to-water heat pump has no significant disadvantages compared to a ground-to-water heat pump and is more than sufficient on its own to meet the requirements. Controlled residential ventilation with heat recovery is also factored in, and the presence of photovoltaics also has a slightly positive effect.

That is clear. We have no insulation in the walls. Only the 36.5 stone + plaster.