Manual S Overview
Manual S bridges the gap between your load calculation results and actual equipment selection. We match manufacturer-specific equipment performance data—at your local design conditions—to your Manual J loads, ensuring the selected system meets but doesn't significantly exceed actual requirements. This prevents the chronic oversizing that plagues the industry.
Why Manual S Calculations Matter
Equipment catalogs list nominal capacity, but actual performance varies with outdoor temperature, indoor conditions, and airflow. Manual S ensures you select equipment based on real-world expanded performance data—not just nameplate tonnage.
Our Manual S Process
Review completed Manual J heating and cooling loads
Research manufacturer expanded performance data
Match equipment capacity to loads at design conditions
Document selection with performance verification
What You'll Receive
- Equipment selection recommendations
- Capacity verification
- Performance documentation
Ideal For
- •Equipment replacement projects
- •New construction system selection
- •Heat pump and dual-fuel system sizing
- •High-efficiency system upgrades
Get HVAC Design You Can Build With Confidence.
Upload your plans or request a quote. We'll handle the HVAC design.