Manual J & S-only
Exact Loads. Optimized Equipment. Year-Round Comfort.
Service Description
At Above Grade, we design HVAC systems the right way—using proven ACCA methods to ensure every home receives equipment and airflow based on real needs, not estimates. Our combined Manual J load calculation and Manual S equipment selection process creates a solid foundation for comfort, efficiency, and long-term performance. Step 1: Manual J – Accurate Heating & Cooling Load Calculations Manual J is where every quality HVAC design begins. We perform a precise, room-by-room calculation to determine how much heating and cooling each part of the home requires. This ensures your system is engineered around the home’s actual conditions, including: Home orientation Insulation levels Construction tightness and infiltration Windows, doors, and building materials Local climate and seasonal temperature swings Number of occupants and internal heat sources Manual J eliminates guesswork and establishes the correct loads your HVAC system must meet. Step 2: Manual S – Selecting the Right Equipment for the Home Once the loads are calculated, Manual S is used to choose the equipment that matches those needs. This step ensures the furnace, air conditioner, or heat pump is properly sized to perform efficiently in your specific climate and home layout. Our Manual S process reviews: Manufacturer performance data Sensible and latent capacity (humidity control) Load capabilities and airflow requirements Efficiency ratings (SEER2, HSPF2, AFUE, EER2) Real-world operating conditions in your region Manual S makes sure the system isn’t too large, too small, or mismatched—preventing issues like poor airflow, short cycling, high energy bills, and shortened equipment lifespan. Why This Process Matters: A properly designed HVAC system isn’t just about comfort—it’s about long-term savings and performance. With Manual J and Manual S combined, you get: Consistent comfort in every room Lower monthly utility costs Better humidity control Longer equipment life Quieter, smoother operation Higher system efficiency and fewer breakdowns When you start with accurate load calculations and correct equipment sizing, everything else falls into place—your ducts perform better, your system runs more efficiently, and your home stays comfortable year-round. Contact me to discuss your exact needs and I will be happy to help! *Disclaimer: Does not size Geo-Thermal Equipment.