Complete Load Calculation Solutions
Professional Manual J, D & S reports designed for contractors who demand accuracy and reliability.
Manual J Calculation
Room-by-room heating and cooling load analysis that determines the exact equipment sizing needed for comfort and efficiency.
What Is a Manual J?
A Manual J calculation is an industry-standard method for determining the heating and cooling loads of a building or home. Our design professionals analyze every room, considering insulation, window placement, orientation, occupancy, and local climate to calculate precise load requirements.
Why It Matters
Accurate load calculations ensure equipment is properly sized—not oversized or undersized. This leads to better efficiency, lower energy costs, improved comfort, and compliance with building codes. An oversized system cycles on and off too frequently, wasting energy and reducing lifespan. An undersized system struggles to maintain comfort.
Who Needs It
Contractors, builders, design professionals, and homeowners planning new construction or equipment replacement. Most jurisdictions now require code-compliant load calculations for permitting.
Manual D Duct Design
Professional duct sizing and layout design to ensure proper airflow distribution and system performance.
What Is a Manual D?
Manual D specifies duct sizing, layout, and design to deliver the correct amount of conditioned air to each room. Our design professionals design ductwork that balances pressure drops, minimizes noise, and ensures even temperature distribution.
Why It Matters
Poor duct design causes hot and cold spots, reduced efficiency, and inadequate comfort. Properly designed ducts match the Manual J loads and work with the selected equipment for balanced performance.
Who Needs It
Any project with ductwork—residential, light commercial, or retrofit installations. Manual D ensures the system you design actually works as intended.
Manual S Equipment Selection
Recommended equipment specifications based on load calculations and project requirements.
What Is a Manual S?
Manual S translates Manual J load calculations into specific equipment recommendations. Based on the calculated loads, our design professionals specify furnaces, air conditioners, heat pumps, and other components that match your project's needs and budget.
Why It Matters
Equipment selection directly impacts efficiency, comfort, cost, and long-term system performance. Our recommendations ensure proper sizing and compatibility.
Who Needs It
Contractors, builders, and homeowners who want professional guidance on equipment selection backed by accurate calculations.
Inspection-Ready Reports
Every report is formatted and documented to meet building department requirements and inspector expectations.
We know what building inspectors want to see. Our reports include all calculation details, assumptions, code references, and supporting documentation needed for permits and inspections. No surprises at the building department.
Consulting & Custom Projects
Beyond standard reports, we offer consulting for complex projects, code questions, and custom analysis.
Need help with a challenging project? Our founder Tim Neumeyer works directly on complex jobs, unusual climates, and custom scenarios. Contact us to discuss your specific needs.