Cooling & Heating Load Planner
Engineering Mode peak load estimate with envelope, solar, internal gains, outdoor air, infiltration and auditable sizing logic.
Start Engineering Mode →Building Energy · HVAC · Cooling
Engineering tools that show their assumptions.
HVAC Engineer Lab is a local-first engineering workspace for transparent load calculations, traceable source pins and reusable project evidence.
Your project stays in the browser
Save to IndexedDB, export JSON and print a report without requiring a cloud account.
Rules and source pins travel with the result
Structured Result carries model version, immutable source pins, evidence references and an input digest.