1. Refrigeration Repair Service: Start a business offering services to repair and maintain refrigeration equipment.

2. Refrigeration Parts Retailer: Sell and distribute spare parts and components for commercial and residential refrigeration systems.

3. Refrigeration Maintenance Company: Offer preventive maintenance services to prolong the life of refrigeration systems.

4. Refrigeration Installation Company: Install commercial and residential refrigeration systems.

5. Refrigeration Testing & Certification Service: Ensure that refrigeration systems are up to standards and provide certified certification of their operation.

6. Refrigeration Leasing Company: Offer refrigeration equipment to businesses for a fixed term and for a periodic fee.

7. Refrigeration Consultant: Provide advice and services to customers on the most efficient and effective way to use refrigeration systems.

8. Refrigeration Training Service: Provide training and coaching to customers who need to update their refrigeration systems and skills.