Scaling Proven Building Energy Efficiency Solutions

We are innovative energy consultants advancing building energy efficiency across design, policy, and technology. We work at the intersection of sustainable building design and energy policy, helping translate what works in practice today into solutions that can transform the built environment at scale.

Our expertise spans building mechanical system efficiency, building science, envelope and daylight analysis, and advanced building energy modeling. We partner with architecture and engineering design teams, as well as energy program planners and policymakers, to deliver insights that are technically rigorous, practical to implement, and grounded in real-world performance.

Three-dimensional architectural renderings of a building design, including structural models and an aerial view of the completed building with outdoor pool area and parking lot.

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

A modern hospital building with a large parking lot and a covered entryway against a sunset sky.

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

California Title 24 Energy Code Compliance

A 3D rendering of a modern, multi-story building with layered, angular design, featuring large glass windows and wooden exterior panels, with a person standing nearby for scale.

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

Planning, Policy & Research

Rooftop HVAC units with a screenshot of a report titled 'Energy Efficiency Potential of Dedicated Outdoor Air Systems in Commercial Buildings'.

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