Energy-Efficient Ducted Heating/Cooling Design

I'm seeking an experienced HVAC designer to create a heating and cooling system for my single-story house in Australia, prioritizing energy efficiency. The system should be ducted heating and cooling, covering the entire house.

Key requirements include:
- Comprehensive load calculation
- Duct layout design
- Energy-efficient equipment selection
- Compliance with Australian standards
- Detailed installation guidelines

Ideal skills and experience:
- HVAC design certification
- Experience with Australian residential projects
- Strong knowledge of energy-efficient systems
- Excellent technical drawing capabilities

Please include relevant experience in your bids.