
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.

Recipe Reel
AI powered recipe/shopping list sharing app

Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | hvaclogic.org | recipio.app |
| Pricing | — | |
| Company | Startup from the United States · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


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...
No description of RecipioAI yet.
What each product offers, as listed by its team.


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


No analysis of HVAC Logic yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing HVAC Logic and RecipioAI.
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
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