Up to 40 percent better thermal performance than a comparable stick-built unit. Translated out of spec-sheet language into what you notice on a hot afternoon.
The numbers
Mineral wool insulation in a continuous insulated envelope delivers R-24 walls and an R-41 roof, up to 40 percent better thermal performance than a comparable stick-built unit. Marvin Elevate double-pane argon-filled low-emissivity glazing carries the window openings.
What that means in a room
Temperature stops swinging. The room you left at a comfortable temperature is still at that temperature hours later, because the envelope is not leaking conditioned air through a hundred small framing gaps. Rooms are quieter too, since the same continuous envelope that stops heat also stops sound.
Equipment does less work
The heat pump HVAC and heat pump water heater required by California's 2025 Energy Code cycle less often in a tight envelope. Less runtime is lower bills and longer equipment life.
Ready for solar
The standing-seam roof accepts S-5 seam clamps, so an array mounts without a single roof penetration. A tight envelope plus solar is where the operating cost of these units gets genuinely interesting.