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WattMate
CalcEngineer
Duct Architect
HeatPumpWise
HVAC-Calc
HVAC Duct Sizer
HVAC Toolkit
Transparent, peer-reviewed engineering calculators for HVAC airflow, duct sizing, cooling loads, heat pumps & field diagnostics. 100% free & client-side.

Website, pricing, platforms and company facts side by side.
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| Website | alanaknows.com | hvaclogic.org |
| Pricing | โ | |
| Company | โ | Startup from the United States ยท 2026 |
| Listed in | โ |
In their own words, as submitted to SaaSHub.


No description of https://alanaknows.com/ yet.
HVACLogic is an open-access engineering suite and computational laboratory for building science, fluid dynamics, and HVAC electrification. All 21 calculation tools run 100% client-side in pure TypeScript with zero database tracking, zero telemetry, and instant job-site computation speed. Key...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
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No analysis of HVAC Logic yet.
As answered by people managing https://alanaknows.com/ and HVAC Logic.
HVAC Logic's answer:
HVAC Logic replaces legacy empirical rules-of-thumb with deterministic, peer-reviewed engineering physics. It solves complex Colebrook-White friction factors, Darcy-Weisbach head losses, psychrometrics, and thermodynamic refrigeration cycles directly in the browser with live reactive visualizers and zero server-side telemetry.
HVAC Logic's answer:
Unlike expensive legacy desktop suites or ad-cluttered online calculators with hidden formulas, HVAC Logic is 100% free, requires no installation or account creation, operates entirely client-side for complete privacy, and provides transparent mathematical formulations with instant shareable URL calculation states.
HVAC Logic's answer:
HVAC design engineers, MEP consultants, building science researchers, commissioning agents, field diagnostic technicians, and mechanical engineering students who require fast, rigorous, and verifiable thermodynamic calculations.
HVAC Logic's answer:
HVAC Logic was established to resolve the widespread problem of oversized equipment and improperly balanced duct systems caused by crude trade shortcuts. By uniting fundamental ASHRAE physics, modern web performance, and live interactive visual modeling, it provides engineers and technicians with transparent, verifiable tools accessible from both the office and the field.
HVAC Logic's answer:
TypeScript, React, Next.js, HTML5 Canvas, reactive SVG rendering engines, and Vitest for continuous mathematical unit testing against NIST REFPROP, ASHRAE Fundamentals, and ACCA standards.
HVAC Logic's answer:
Share your experience with using https://alanaknows.com/ and HVAC Logic. For example, how are they different and which one is better?