I would like someone to perform a heat load calculation on an old stone building in rural wales.

I am looking for someone to perform a heat load calculation on my old stone building in rural Wales. The building is more than 2000 sq ft in size.

- The building currently has an existing heating system, but it needs upgrading.
- The main purpose of the building is residential.

Skills and experience required:
- Experience in performing heat load calculations for buildings
- Knowledge of heating systems and upgrades
- Familiarity with residential buildings
- Understanding of the unique challenges of old stone buildings in rural areas.