Design, Engineering & Technical Software · Reviewed

Kwik Model 3D

3D HVAC design and duct modeling without CAD skills

★ 4.5 / 5|From $299/year|Design, Engineering & Technical Software

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Overview

Kwik Model 3D (KM3D), built by Coded Energy, brings true 3D modeling to residential HVAC design without requiring AutoCAD or Revit skills. Designed by veteran HVAC engineer Russ King, the software lets users quickly create a three-dimensional model of a home from a 2D floor plan, an imported image, or a Cubi.Casa LiDAR phone scan.

Two editions target different workflows. KM3D Eagle combines 3D modeling, Manual J load calculations, Manual S equipment selection, and Manual D duct design. KM3D Kestrel is a draw-only version that imports room-by-room load results from other software.

The software's sweet spot is residential HVAC retrofits and new construction where visualizing ductwork catches collisions and sizing issues before installation.

Key Features

3D construction

Drag-and-drop walls, floors, and ceilings with visual dimensioning.

Duct design

Draws flex and rigid ducts to scale with realistic fittings.

EnergyGauge engine

Powers Manual J in Eagle edition.

Cubi.Casa import

Phone LiDAR scan into a modeled house in minutes.

Kestrel add-on

3D duct add-on to other Manual J software.

Mini-split library

Equipment library for modern electrification projects.

Free trial

30-day free trial and per-year licensing.

Pros & Cons

Pros

+True 3D visualization of ductwork catches install problems early
+No CAD experience needed
+Affordable compared to enterprise design suites
+Works with imported scans from Cubi.Casa

Cons

−Residential focus; limited commercial capability
−Per-computer licensing less flexible than cloud SaaS
−Smaller ecosystem than Wrightsoft or Elite
−Kestrel requires separate Manual J software

Best For These Industries

HVAC & Plumbing
residential-contractors
HVAC & Plumbing
home-performance-contractors

Kwik Model 3D Comparisons

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Alternatives to Kwik Model 3D

Wrightsoft (Right-Suite Universal)

★ 4.3

The industry standard for HVAC load calculation and duct design

Industry-standard HVAC design software suite offering integrated Manual J load calculations, Manual D duct design, and Manual S equipment selection for residential and commercial contractors.

From Contact for pricingRead review →

Elite Software (Rhvac / Ductsize / CHVAC)

★ 4.2

HVAC and MEP engineering software since 1979

Veteran HVAC and MEP engineering software company offering Rhvac for ACCA Manual J, D, and S calculations plus a broad suite of mechanical, electrical, and plumbing design tools.

From Contact for pricingRead review →

Cool Calc

★ 4.4

Web-based, ACCA-approved Manual J at a fraction of the cost

Web-based, ACCA-approved Manual J, S, and D load calculation software built for affordability and simplicity, with a free tier for homeowners and DIYers.

From $100/monthRead review →

Conduit Tech

★ 4.6

LiDAR-powered HVAC design and sales on a single tablet

LiDAR-powered HVAC design and sales platform that turns an iPad Pro scan into a 3D model, room-by-room Manual J load calculations, and a visual proposal in one in-home visit.

From Contact for pricingRead review →

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Kwik Model 3D

Overview

Key Features

3D construction

Duct design

EnergyGauge engine

Cubi.Casa import

Kestrel add-on

Mini-split library

Free trial

Pros & Cons

Pros

Cons

Best For These Industries

Kwik Model 3D Comparisons

Alternatives to Kwik Model 3D

Wrightsoft (Right-Suite Universal)

Elite Software (Rhvac / Ductsize / CHVAC)

Cool Calc

Conduit Tech

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