For a system with water underfloor heating, roller shutter wall switches, light switches, and sockets, approximately 30-50 MQTT-enabled WiFi wall thermostats would be needed. The exact number would depend on the size of the space and the specific requirements of the system. It's important to consider the layout of the space and the control needed for each area when determining the number of thermostats required. Additionally, it's important to consult with a professional to ensure the system is properly designed and installed. **

Roller shutters can effectively block out light, but they may not completely eliminate all light from entering a room. Some light may still filter through the edges or gaps in the shutters, especially if they are not properly installed or if they are of lower quality. However, high-quality roller shutters with proper installation can significantly reduce the amount of light entering a room, providing a more comfortable and darkened environment. **

Yes, you can apply regular wall paint with a paint roller. A paint roller is a common tool used for painting walls as it helps to cover large surface areas quickly and evenly. Make sure to choose the appropriate roller nap size for the type of paint you are using and the texture of your walls. Additionally, ensure that you properly prepare the surface, apply the paint in even strokes, and allow sufficient drying time between coats for the best results. **

One can paint a wall without using a roller by using a paintbrush or a paint sprayer. A paintbrush can be used to apply paint to the wall in a methodical and even manner, although it may take longer than using a roller. A paint sprayer can also be used to quickly and evenly apply paint to the wall, but it requires careful preparation and cleanup. Both methods can achieve a smooth and professional-looking finish when done properly. **

No, the dark wall does not have light spots. The dark wall is likely uniform in color and does not contain any areas of light. Light spots would typically be found on a lighter-colored wall where light is reflecting off a surface or shining through a window. **

To remove wall paint from a roller shutter strap, you can start by using a mild detergent or soap mixed with warm water and a soft brush to gently scrub the affected area. If the paint is stubborn, you can try using a paint remover or rubbing alcohol to help dissolve the paint. Be sure to test any chemicals on a small, inconspicuous area first to ensure they do not damage the strap. Finally, rinse the area thoroughly with clean water and allow it to dry completely. **

One way to attach a wall light without cables to the wall is by using a battery-operated wall light. These lights come with adhesive backing or mounting hardware that allows them to be easily attached to the wall without the need for cables. Another option is to use a wall-mounted, battery-operated sconce light, which can be easily installed without the need for wiring. Additionally, some wall lights come with a remote control, allowing them to be operated wirelessly without the need for cables. **

The noises in the wall at the roller shutter box could be caused by a variety of factors. It could be due to the expansion and contraction of the materials as they heat up and cool down, especially if the roller shutter box is located in an area exposed to sunlight. It could also be caused by the movement of the roller shutter itself, as it opens and closes, or by the wind causing vibrations in the box. Additionally, it's possible that there are animals or insects nesting or moving around inside the wall, creating the noises. **