Manual J-Only

Service Description

At Above Grade, we start every HVAC design with a Manual J residential load calculation—the industry’s gold standard for determining how much heating and cooling each room in a home truly needs. This detailed analysis ensures your system is designed for maximum comfort, efficiency, and performance from day one. What Our Manual J Calculation Covers: Our Manual J report provides a precise, room-by-room breakdown based on real building data, including: Home orientation and how sunlight affects temperature Insulation quality in walls, ceilings, floors, windows, and doors Construction details such as air leakage, tightness, and infiltration Local climate conditions and seasonal variations Number of occupants and internal heat sources Building materials and envelope performance These factors allow us to determine exactly how much heating and cooling each part of the home requires—nothing more, nothing less. Why Manual J Is So Important: HVAC systems should be sized to fit the home, not chosen at random or upsized “just in case.” Oversizing and undersizing can both lead to high utility costs, uncomfortable rooms, and premature equipment failure. Manual J ensures your HVAC design is based on precise calculations, which means: Lower energy bills from a correctly sized system Better temperature balance throughout the home Improved humidity control—especially important for AC systems Reduced wear and tear from fewer start/stop cycles Higher overall comfort and longer equipment life Whether it’s new construction or a major renovation, Manual J is the foundation for an HVAC system that performs the way it should. With Above Grade, you get reliable, data-driven design—not guesswork.