The Lemunda Sandstone from Sweden is generally suitable for exterior applications, including in dusty climates. However, it is important to consider a few factors before using it in such conditions:

1. Durability: Lemunda Sandstone is a relatively soft and porous material, which means it may require regular maintenance and sealing to protect it from dust and weathering. In dusty climates, the stone may accumulate more dirt and dust particles, which can impact its appearance and longevity. Regular cleaning may be necessary to keep it looking pristine.

2. Sealing: Applying a high-quality sealant can help protect the sandstone against the ingress of dust particles and moisture. The sealant creates a protective barrier that minimizes staining and makes the stone easier to clean. It is advisable to consult with a stone supplier or professional to determine the most suitable sealant for Lemunda Sandstone in dusty climates.

3. Finishes: Consider the finish of the Lemunda Sandstone. A polished or honed finish may be more challenging to maintain in dusty conditions as it is smoother and may attract more dust particles compared to a textured or rough finish. A textured surface can help hide dust accumulation and make maintenance easier.

4. Regular Cleaning: Regular maintenance, including dusting and cleaning, is essential in dusty climates to prevent the buildup of debris on the sandstone. Using a soft brush or low-pressure water hose can help remove dust without damaging the surface.

Overall, with proper sealing, maintenance, and cleaning, Lemunda Sandstone can be used for exterior applications in dusty climates. However, it is recommended to consult with a stone professional to assess its specific suitability for your intended use and location.