High Design Meets High Performance

SixTwentyOne, Kali Buchanan Interior Design, and Kala joined forces to craft a home that showcases the essence of natural light, timeless design, and a seamless blend of indoor-outdoor living. This home was designed around a slit of daylight through the center of the home, allowing natural light to pour deep into the interior. Thoughtful design elements coupled with high-performance details are what truly redefine luxury in this Prairie Village home.

It's all in the details.

Kala collaborated with SixTwentyOne and Kali Buchanan Interior Design to ensure high performance details were included from the beginning of the process on this custom build in Prairie Village. The result? A home that provides exceptional comfort, health, durability, and sustainability for decades longer than a traditionally built home.


The difference goes far beyond aesthetics; it’s intentionally included in every layer and detail, from the continuous exterior insulation in the airtight building envelope, to Phius-certified windows and doors with thermally-broken frames from Alpen and Smartwin, to a fully ducted ERV system that provides whisper-quiet mechanical ventilation. 


  • Airtight 0.63 ACH50, vapor-open envelope assembly

    A vapor-open (or vapor-permeable) wall assembly allows moisture that inevitably enters the wall (from leaks, air transport, or vapor diffusion) to dry out rather than being trapped. The goal is not to let unlimited vapor flow through, but to balance control + drying potential ensuring the long-term durability of your home.

  • Thermally-broken, triple-pane, NFRC-certified U-Value 0.15 windows

    Among the best in the world, these windows provide exceptional insulation while allowing for abundant natural light—keeping you warm in winter and cool in summer.

  • Custom-built high-performance entry door with multi-point locks

    Multi-point locks and airtight seals make these doors not only secure but also energy efficient and incredibly durable.

  • R-32 wall assembly with continuous exterior insulation

    Exceptional insulation capacity for managing thermal transfer of energy keeping the inside of your home temperature stable in all conditions.


  • R-16 continuous slab and R-29 foundation insulation

    Minimizes thermal energy transfer to and from the ground through the basement slab and walls ensuring the lowest part of your home is the same comfortable temperature  as the rest of your home.


  • Mechanically-controlled, continuously filtered fresh air system

    Delivers exceptionally clean air certified by the EPA’s Indoor Air Quality+ standards, ensuring a healthier living environment.

  • 39 HERS index score

    A HERS score is a ranking of a home's expected energy efficiency on a scale of 0-150. The lower the score the more efficient a home is. In recent years, the average HERS score in Kansas has been  in the mid 60s.

  • Heat pump hot water heater

    An ultra-efficient hot water solution that’s as sustainable as it is effective.

  • High efficiency electric heat pump

    Coupled with the control layers, ensures energy costs are 70-80% lower than a similarly sized conventionally built home.


  • Minimized thermal bridge design

    Reduces energy loss, prevents condensation in walls, and ensures consistent indoor temperatures, and contributes to exceptional buidling durabilty.

  • EV charge ready

    Conveniently charge your electric vehicle in your own garage.