Buildings That Perform

Locus 218 helps architects, designers, builders, and homeowners get buildings right. Not just on paper but in the real world.

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218 — Clintonville Passive House · Phius ZERO 2021

It's all grounded in one idea: a building is a system, and every piece has to work with every other piece.

In geometry, a locus is the point where every condition is satisfied at once. Building well is an exercise in finding the point where durability, health, comfort, efficiency, sustainability, and cost all hold true together.

To get there, we provide:

  • building science expertise
  • energy modeling
  • efficient HVAC design
  • construction consulting

Why performance matters

Durability

Assemblies that keep water and vapor moving out of the structure, so it stays dry for decades.

Exterior CI + rainscreenClintonville Passive House wall

Health

Continuous fresh air, low-VOC materials, and radon kept out.

10 → 1.4 pCi/LRadon, before and after mitigation

Comfort

No drafts, no hot or cold spots, and a quiet interior.

0.027 CFM50/ft²Airtightness vs. 0.060 Phius limit

Efficiency

A fraction of the energy of a typical home.

HERS −4With rooftop solar

Sustainability

Low operating carbon, all-electric systems, and buildings built to last long enough to earn back what went into them.

Phius ZERONet-zero source energy, certified

Cost

Measured as total cost of ownership, not just the build budget. Lower utility and operating costs are built in.

~60% lowerOperating cost, passive vs. code-built
Clintonville Passive House, front entry with yellow door and blue-gray siding
Latest article · Dec 5, 2024

Clintonville's First Certified Passive House

You all knew by now I'm certifiable. And now it's official.

Read the article →