Energy Efficiency
Manual J Load Calculation
The industry-standard engineering calculation that determines exactly how much heating and cooling capacity your specific home needs based on its size, insulation, windows, and local climate.
What Is a Manual J Load Calculation?
A Manual J load calculation considers your home's square footage, insulation R-values, window types and orientation, ceiling height, number of occupants, appliance heat gain, local climate data, and more to determine exactly how many BTUs of heating and cooling your home needs. This prevents the costly mistakes of oversizing (short cycling, humidity problems, wasted money) or undersizing (equipment can't keep up on extreme days). ACCA (Air Conditioning Contractors of America) developed Manual J as the gold standard for equipment sizing.
Why It Matters for Your Home
Shockingly, many HVAC contractors skip the Manual J calculation and size equipment based on rules of thumb or what the previous system was. This is one of the biggest sources of comfort problems and wasted energy in residential HVAC. A proper load calculation costs relatively little but ensures your new system is sized correctly for your home — not the neighbor's house or the contractor's best guess.
Don't let anyone guess on your system size. Call Trademark Tek at 541-500-0663 for a proper load calculation.
Quick Facts
Category
Energy Efficiency
Also Known As
Manual J Load Calculation
