HVAC and DWV Design for Home

I need a comprehensive HVAC and DWV design for a 2000 sqft single-story residential home.

HVAC Design Requirements:
- Systems: Heating, Ventilation, Air Conditioning
- Standard sheet metal duct
- Encapsulated crawl space conditioning

DWV System:
- Material: PVC

Ideal Skills and Experience:
- Proven experience in residential HVAC design
- Knowledge of sheet metal duct systems
- Familiarity with crawl space conditioning techniques
- Expertise in PVC DWV systems

Please provide relevant work samples and ensure your bid is within budget. Looking forward to your proposals!