HVAC & ERV Sizing for 8,032 sq ft Home

Job ID: 40212875

Budget: $50 – $0 USD

I need an expert to size the HVAC and ERV system for my new build home.

Key Details:
- Home size: 8,032 sq ft (includes 635 sq ft unfinished conditioned space and 650 sq ft open space where second floor overlooks first)
- Climate zone: 4A
- Number of floors: Basement + ground floor (Zone 1), second floor (Zone 2), vented attic (planning for conditioned space around Zone 2 HVAC unit in attic).

Ideal Skills & Experience:
- Experience with designing residential HVAC and ERV systems
- Knowledge of climate zone 4A requirements
- Ability to calculate load, ventilation requirements for multi-story homes

Please provide a detailed approach and any relevant experience.