Translating Great Designs into
Real-World Performance

We help design teams make smarter decisions about energy, systems, and performance when it matters most. Combining deep modeling expertise with performance-informed Basis of Design, we shape mechanical system concepts long before detailed engineering begins — defining configurations, sizing logic, passive design integration, and controls approaches that align architecture, envelope, and mechanical systems into a simple, resilient, low-carbon strategy.

We speak building integration - we understand how loads, systems, envelope, and controls work together - not just how they’re modeled.

We know the code - and the cracks in it. We help shape compliance pathways and know where modeling software hits its limits.

We see the big picture - we balance comfort, cost, carbon, and constructability, not just checking boxes.

Why Teams Trust A2 Efficiency

We go beyond typical efficiency consulting. We guide performance strategy from first sketch to final system, grounded in how buildings really work.

Our Services

High Performance Building Design

Performance modeling and Basis-of-Design support that shapes system concepts, envelope strategies, and comfort-driven decisions.

California Title 24 Energy Code Compliance

Deep technical support for California’s energy code, concept through permitting

Planning, Policy & Research

Technical strategy for program design, code development, and market transformation

📐 Types of Projects We Support

CBECC-Com / Res (Title 24)

EnergyPlus / OpenStudio
VE-IES, Radiance, Therm
Custom scripting for automation, batch runs, and parametrics

Who We Work Best With

We’re a good fit for:

Architects and design teams looking for early feedback and performance support
MEP engineers modeling new system types or evaluating aggressive design targets
Owners and sustainability consultants navigating code, compliance, and program goals