Editions

Choose the edition that matches your scope. Free standalone tools cover daily quick calcs. Discipline-specific editions ship the calculation engine, code compliance, and reports for one practice area. The Complete bundle ships everything.

Free Tools

Standalone calculators — no account needed for two of three.

Free forever

PsychChart Pro EXE
DuctSizer Pro EXE
PlumbingCalc Pro EXE (free account)
In-browser duct sizer
In-browser psychrometric chart

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Energy Edition

Code compliance + 8760 simulation specialist.

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Per seat / volume discounts available

ASHRAE 90.1 + Appendix G
Title 24 (CBECC wrap)
IECC 2024
8760-hour energy simulation
NRCC / LMCC forms
Life-cycle cost
Carbon footprint

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HVAC Edition

Manual J + system sizing + equipment selection.

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Per seat / volume discounts available

ACCA Manual J 8 (full tables)
ASHRAE Ch. 17/18 commercial loads
Equipment selection (200+)
Duct & pipe sizing
Psychrometric engine
Datacenter / cleanroom / healthcare
Manufacturer catalogs

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Plumbing Edition

IPC / UPC / CPC + DHW + storm.

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Per seat / volume discounts available

IPC 2024 / IPC 2021
UPC 2021 / CPC 2022
Hunter's Curve fixture sizing
DWV drainage design
DHW recirculation
Gas piping (NFPA 54)
Storm drainage

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CA Admin Edition

RFI + submittal + punchlist + field survey.

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Per seat / volume discounts available

RFI generation & tracking
Submittal review with markup
Punchlist tracking
Daily construction log
Transmittal log
Specification editor
Field survey PWA
Commissioning manager

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Complete

All editions + Revit add-ins + AI assistant.

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Best value — saves vs a la carte

Everything in all 4 editions
Revit Design Suite add-in
Revit Clash Detection
Revit MEP Tools
AutoCAD plugin
AI Design Assistant
Proactive AI engineer
1,300+ engineering modules

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Edition Feature Matrix

Every cell is verified against the shipping build. ✓ = included · core = core capabilities only · × = not in this edition.

Feature	Free	Energy	HVAC	Plumbing	CA Admin	Complete
Load Calculations
Heating / Cooling Load Calcs	×	✓	✓	×	×	✓
ACCA Manual J 8 (full tables)	×	×	✓	×	×	✓
Psychrometric Engine	✓	✓	✓	×	×	✓
Ventilation (ASHRAE 62.1 / 62.2)	×	✓	✓	×	×	✓
Energy & Compliance
8760-Hour Annual Simulation	×	✓	×	×	×	✓
ASHRAE 90.1-2022 + Appendix G	×	✓	×	×	×	✓
California Title 24 (CBECC Wrap)	×	✓	×	×	×	✓
IECC 2024	×	✓	×	×	×	✓
NRCC / LMCC / NRCI Forms	×	✓	×	×	×	✓
Life-Cycle Cost (25-year)	×	✓	×	×	×	✓
Carbon Footprint	×	✓	×	×	×	✓
Equipment & Sizing
Equipment Selection (200+)	×	×	✓	×	×	✓
Duct & Pipe Sizing	✓	×	✓	core	×	✓
Specialty (Datacenter / Cleanroom / Healthcare)	×	×	✓	×	×	✓
Plumbing
IPC / UPC / CPC Codes	CPC only	×	×	✓	×	✓
Hunter's Curve Fixture Unit Sizing	✓	×	×	✓	×	✓
DHW Recirculation	×	×	×	✓	×	✓
Gas Piping (NFPA 54)	×	×	×	✓	×	✓
Storm Drainage	×	×	×	✓	×	✓
Construction Administration
RFI / Submittal / Punchlist	×	×	×	×	✓	✓
Daily Log / Transmittal Log	×	×	×	×	✓	✓
Specification Editor (UFGS / MasterSpec)	×	×	×	×	✓	✓
Field Survey PWA	×	×	×	×	✓	✓
Commissioning Manager	×	×	×	×	✓	✓
Fire & Life Safety
NFPA 13 / 14 / 20 / 24 Sprinkler & Standpipe	×	×	✓	×	×	✓
NFPA 72 Detection & Alarm	×	×	✓	×	×	✓
NFPA 92 Smoke Control	×	×	✓	×	×	✓
Electrical
IEEE 1584-2018 Arc Flash	×	×	×	×	×	✓
NEC Service / Feeder / Branch Sizing	×	×	×	×	×	✓
BIM & Integrations
Revit Design Suite Add-in	×	×	×	×	×	✓
Revit Clash Detection (BVH + parallel SAT)	×	×	×	×	×	✓
Revit MEP Tools	×	×	×	×	×	✓
AutoCAD Plugin	×	×	×	×	×	✓
IFC / gbXML Import	×	✓	✓	✓	×	✓
AI & Reports
AI Design Assistant (Gemini / Claude / OpenAI)	×	core	core	core	core	✓
Proactive AI Engineer	×	×	×	×	×	✓
PDF / Excel Report Generation	CSV/TXT	✓	✓	✓	✓	✓
Support & Updates
14-Day Free Trial	✓	✓	✓	✓	✓	✓
In-App Auto-Updater	✓	✓	✓	✓	✓	✓
Email Support	✓	✓	✓	✓	✓	✓

Bundle Savings Save XX%

The Complete bundle costs less than buying any three discipline-specific editions a la carte. The more disciplines your firm covers, the bigger the discount. Most multi-disciplinary firms recover the bundle cost by pulling Energy + HVAC + Plumbing under one license.

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Enterprise & Site Licenses

Volume pricing for firms with 5+ seats, government / military per-installation licenses, educational discounts, and custom integration support. Includes priority support, named technical contact, and on-prem deployment options.

Contact Enterprise Sales

Common Questions

Do I have to commit to a tier upfront?

No. The 14-day free trial is the Complete bundle — try every edition before deciding. Switch tiers anytime. License keys upgrade in place; no reinstall needed.

Are the free standalone tools really free forever?

Yes. PsychChart Pro and DuctSizer Pro are free, no account required. PlumbingCalc Pro requires a free account so we can offer cloud-synced fixture libraries, but the calculator itself is free.

What does "discipline-specific edition" exclude?

Each edition ships everything needed for daily work in that practice. The HVAC Edition does NOT include 8760 simulation or Title 24 (those are Energy Edition). The Energy Edition does NOT include detailed equipment selection or fire protection (those are HVAC Edition). The Complete bundle ships every module.

Can I bring my own AI API key?

Yes. We integrate with Gemini (free tier supported), Claude, and OpenAI. Use whichever provider you prefer. Bring your own API key — we never proxy AI traffic through our servers.

How are validation accuracy claims verified?

Every release ships with 14,000+ regression tests including ASHRAE Standard 140 envelope test cases, DOE Commercial Reference Building EUI targets, ACCA Manual J 8 worked examples, IEEE 1584-2018 Annex D worked examples, and NFPA 13/20/72/99 handbook examples. The test suite runs on every commit. See the Features page for full citations.