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Real-Time Building Energy Modeling · ASHRAE Compliant

Designing the
Net‑Zero Future, One Building at a Time.

A real-time, browser-based SaaS that compresses weeks of engineering iteration into 10 minutes of slider-driven optimization.

Start 14-day Free Trial See Live Demo
No credit card required Cancel anytime Works on any browser
~70%
Max BTU Reduction
10 min
Months → Minutes
100%
ASHRAE Compliant
~50%
Carbon Reduction
On Cloud
No install needed
14-day
Free Trial

Built on the standards trusted by the world's leading engineers

ASHRAE CLTD/CLF
OTTV ≤ 45 W/m²
Net-Zero Aligned
PDPA · GDPR Ready
LIVE DASHBOARD · REAL-TIME CALCULATION

See your design's energy in real-time

Move a slider — watch BTU drop, OTTV adjust, and savings climb. No reload, no waiting.

app.zerooptimize.com
Custom Envelope
Wall R-Value3.5
Roof Insulation1.0
Glazing SC0.45
Infiltration0.80
Live Output
47.1W/m² OTTV
✓ Below 45 W/m² regulatory cap
67k THB/yr saved
vs. Baseline · 70% reduction
WallGlassRoofPlenumPeopleEquip
Built for the Climate Era

Engineering precision, designed for speed

Every feature engineered to compress design iteration without sacrificing accuracy.

Cross-section of an optimized building (dark theme version) Cross-section of an optimized building (light theme version)
🏢
Cross-section infographic Save 2 PNGs: climate-cross-section-dark.png + climate-cross-section-light.png
EVERY COMPONENT, OPTIMIZED

From baseline to Net-Zero,
component by component.

We model heat flow through every part of your envelope and surface the highest-impact upgrades first — so every dollar of build cost moves the needle.

OPTIMIZED ROOF
High-albedo membrane + R-30 insulation
−62%
HIGH-PERF WALL
Continuous insulation + thermal break
−68%
LOW-E GLAZING
Spectrally selective coating, SC ≤ 0.35
−71%
AIRTIGHT ENVELOPE
≤ 0.6 ACH @ 50Pa, sealed penetrations
−82%
Average savings on first model · ASHRAE 90.1 reference
⚡

Real-time BTU Engine

ASHRAE CLTD/CLF + OTTV calculation runs entirely on the client.

🧱

Custom Envelope Optimizer

R-Value walls, SC glass, roof insulation, infiltration ACH all editable.

🪟

Layered R-Value Calculator

Stack materials and let the system compute aggregate R-value.

📊

Baseline vs. Optimized Delta

Compare baseline vs. your design — see annual savings and CO₂ avoided.

📋

Branded PDF Reports

Custom-logo PDF ready for client presentation or BEC permit.

🔌

BIM Integration Ready

API-first architecture. Connect with Revit, Rhino, ArchiCAD workflows.

Founders

Built by the people who use it daily

A working architect and a sustainability engineer — not consultants.

Atsawaphak Sakuldechthana (Kim)
Founder · CEO

Atsawaphak Sakuldechthana (Kim)

Sustainable Design Architect · Net-Zero Building Strategist
Architect specialized in passive design, building envelope optimization, and tropical climate-responsive architecture.
BIM: Architectural modeling (Revit, ArchiCAD), parametric envelope design (Rhino · Grasshopper).
Sin Munkhalasiriwanit (Syn)
Co-Founder · MD

Sin Munkhalasiriwanit (Syn)

Chief Decarbonization Officer · Climate-Tech Engineer
Environmental engineer focused on eco-conscious engineering, carbon credit frameworks, and decarbonization strategy.
BIM: MEP modeling (Revit MEP, Navisworks), HVAC load coordination, BIM-based energy & carbon analysis.
Simple, transparent pricing

Plans that scale with your projects

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Free
$0/forever
Students & explorers
  • 1 active project
  • Up to 3 floors / 5 rooms
  • Real-time BTU/OTTV
  • Multilingual UI (4 langs)
Start Free
Most Popular
Pro
$49/month
Solo architects & consultants
  • Up to 5 floors / 20 rooms
  • Save / Load 10 projects
  • Branded PDF export
  • Priority support · <4h reply
Start 14-day Trial
Studio
$199/month
Small studios & firms
  • Unlimited projects
  • Up to 5 team members
  • API access · webhooks
  • Phone support · SLA
Start 14-day Trial

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Ready to design your first Net-Zero building?

Join hundreds of architects already shipping in minutes, not months.

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