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FEATURES

Every feature,
engineered for speed

From the calculation engine to the PDF report, every feature exists to compress your design iteration without compromising accuracy.

CALCULATION ENGINE

ASHRAE-grade physics, runs entirely in your browser

Cooling Load Temperature Difference (CLTD) and Cooling Load Factor (CLF) formulas — the same methodology used by IES VE, eQuest, and Carrier HAP — execute client-side in milliseconds. No server roundtrip. No latency. Move a slider, see the answer.

  • ASHRAE Handbook Fundamentals — CLTD/CLF tables for 24 wall types, 14 roof types
  • OTTV equation aligned with Thailand's BEC ≤ 45 W/m² regulatory cap
  • Sensible + Latent load decomposition
  • Heat-flow visualization for each façade direction
  • COP / EER / SEER conversion for chiller sizing
Calculation Output
BTU/hr152,400
Tons of Refrigeration12.7 TR
OTTV (W/m²)42.3 ✓
Annual kWh38,700
Annual ฿ saved฿147,200
Custom Envelope
Wall R-Value3.5
Glass SC0.45
Roof R-Value1.0
Infiltration ACH0.80
Rotation45°
REAL-TIME OPTIMIZER

Slide. See. Save.

The signature interaction of Zero Optimize. Adjust any envelope parameter — wall, glass, roof, infiltration, building rotation — and watch the entire calculation update instantly.

  • R-Value (W/m²K) for walls and roof
  • Shading Coefficient (SC) for glass — Low-E, tinted, clear
  • Infiltration ACH (Air Changes per Hour)
  • Building rotation 0° / 45° / 90° to test orientation
  • Per-direction façade tuning (N/S/E/W independently)
LAYERED R-VALUE

Stack materials, see the math

Need composite walls? Stack concrete + EPS + gypsum + cladding. Each layer's thickness, conductivity, and density combine into an aggregate R-value, automatically returned into the main engine.

  • 50+ pre-loaded materials (Thai/SEA construction standards)
  • Add custom materials with thermal conductivity (W/mK)
  • Side-by-side comparison of 3 wall variants
  • Embodied carbon (kgCO₂e/m²) for each variant — coming Q4 2026
Wall Composition
Concrete 100mmR 0.058
EPS Insulation 50mmR 1.470
Gypsum Board 12mmR 0.075
Air Films (in/out)R 0.170
Total Wall RR 1.773
📊

Baseline Comparison

Auto-generated baseline (R=0.47 brick, clear glass, R=0.20 concrete roof) lets you instantly quantify the value of every upgrade.

📋

PDF Report Export

Branded reports with BTU, OTTV, kWh, COP, and savings. Pro tier replaces watermark with your firm's logo. Studio tier adds full firm branding.

💰

ROI & Payback

Enter material costs and see payback period in years. Stop guessing whether Low-E glass is "worth it" — see the number.

🌍

Carbon Impact

Convert annual kWh saved into avoided tCO₂e. Output aligned with T-VER, Verra, and Gold Standard methodologies (Sin's expertise).

🏛

BEC Compliance Check

Auto-flags if your design exceeds Thailand's OTTV regulatory cap (≤45 W/m² for office, ≤50 for retail). Ready for permit submission.

🎓

Educational Mode

Verified .edu / .ac.th emails get free Pro access. Walks through each calculation step — perfect for thesis projects.

🌐

4-Language UI

English, Thai, Chinese (Simplified), Hindi. UI auto-translates while engineering terms (BTU, OTTV, R-Value) stay universal.

☁

Auto-Save Cloud Sync

Pro & Studio tiers sync across devices. Browser tab crash? Pick up where you left off on phone, tablet, or desktop.

🔌

BIM API (Q3 2026)

Native Revit & Rhino plugins. REST API for custom integrations. Webhook events for project changes. Studio+ tiers only.

FROM INPUT TO INSIGHT · IN SECONDS

From a floor plan to a heatmap of savings

Drop in your plan, and Zero Optimize colors every zone by load — so you can see exactly where the heat is, and exactly where to act.

Floor plan → Energy heatmap (dark theme version) Floor plan → Energy heatmap (light theme version)
🗺️
Floor Plan → Heatmap visual Save 2 PNGs: floor-plan-heatmap-dark.png + floor-plan-heatmap-light.png
OTTV
45.7 W/m²
↓ 70% vs baseline
BTU/h
12,500 →
4,200
Savings
−66%
annual energy
Watch the live demo  →

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