The Manual J calculation process determines the needed heating and cooling your home needs to stay “just right” – toasty warm in the cold frigid months and cool and comfortable in the hot steamy months. Decades ago HVAC engineers developed what is now called ACCA Certified Manual J load calculations and is the proven industry standard for properly sizing your heating and cooling equipment.
Why is it important to size your HVAC system properly?
The three reasons properly sized HVAC equipment is critical are: Equipment Efficiency, Everyday Comfort and Indoor Air Quality
- HVAC Equipment Efficiency: Improperly sized comfort equipment will cost more to operate. If the installed equipment is oversized, you will pay for the larger unit, larger installation costs, larger energy costs to operate the oversized fans and compressors. In addition, the system will cycle on and off causing unusual wear and tear. In contrast, if the unit is undersized, it will run continuously. Your system needs to be sized “just-right”. The system will run steadily and smoothly and will be more affordable to operate.
- Everyday Comfort: Many HVAC installers believe in “Bigger is Better” instead of “Just-Right” resulting in comfort issues for the people living in the home. An oversized air conditioner will
not dehumidify the home. Because the unit cycles on and off, the coil never has the opportunity to cool down. In a properly sized AC unit, the coil cools down producing condensation which in turn dehumidifies your home. So the thermostat set point is satisfied, but the occupants of the home certainly are not because they are cold and clammy.
- Indoor Air quality: If your contractor believes “Bigger is Better” and your system is over-sized, the system will not properly dehumidify, resulting in moisture problems. A moist atmosphere can result in mold and mildew, excessive dust mites, etc. Lack of humidity is a major issue throughout the United States and
Properly sized HVAC equipment by the proven industry standard of ACCA Compliant Load Calculations is the ONLY way to ensure YOUR house is “Just Right”!