"The HVAC system is just designed to match the rate at which that home is gaining or losing heat." — Spencer Rosen
"It's part of their job…making sure that the piece of equipment they put in the house matches what the house needs." — Russ King
"Don't split hairs when your job is to shave heads." — Connor King, quoting Russ
What if betterHVAC design started not with the equipment, but with a clearer picture of the house?
In this episode of Building HVAC Science, Bill Spohn talks with Russ King, Connor King, and Spencer Rosen about the evolution ofKwikModel, the growing connection between HVAC design and energy modeling, and why making buildings visual can makegood designmore accessible.
Russ explains whyaccurateload calculationsremainfundamental, especially as homes transition from furnaces to heat pumps. Replacing equipment based on what was there before can perpetuate oversizing or create entirelynew problems. Today, tools such as LiDAR scanning and 3D modeling make gathering building geometry dramatically easier than the tape-measure-and-sketch methods of the past.
The conversation also explores the relationship between the building envelope and HVAC. Spencer describes heating and cooling equipment as responding to the rate at which the house gains or loses heat. Change the envelope, and youchange what the HVAC system needs to do. That makes load calculations, air leakage, insulation, duct design, and equipment selection parts of the same problem rather than separate disciplines.
For contractors who findall ofthis intimidating, the message is practical: start somewhere. Partner with a designer to perform load calculations on a few projects, compare the results with your existing rules of thumb, pursue building-science education, and build your knowledge incrementally.
The team also shares whereKwikModelisheaded. With Coded Energy taking over theEnergyGaugelicense from the University of Central Florida, development is underway on a cloud-based version ofKwikModelthat should remove installation barriers and create opportunities for better guidance, training, error checking, and user-driven improvements.
Ultimately, bettersoftwareisn'tjust about fastercalculations.It'sabout helping contractors understand the building, makebetter decisions, and, as Russ puts it, build confidence.
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