AutoCAD Plugin (MSI)

ACA

Area-Based AC Tonnage Calculator

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Calculation Logic

• Thumb Rule: Calculates tonnage based on Floor Area (Standard 3m height).
• Layer Detect: Scans the "HAP" layer for closed polylines.
• Output: Generates a room center label with Sq.m and required Tonnage.

ACV

Advanced Volume & Tonnage Calculator

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Calculation Logic

• Volume Logic: Uses Area × User-Input Height for accurate load.
• Detailed Reporting: Labels Area (Sq.m), Height (m), Volume (Cu.m), and Tonnage.

BBB

Shoe Branch + Integrated VCD Damper

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Drafting Logic

• Automation: Draws a shoe branch and auto-trims the main duct.
• Damper: Automatically inserts a scaled VCD block at the throat.

CC

Rectangle Crossing Trim

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Cleanup Logic

• Trim everything crossing a rectangular selection box. Great for cleaning junctions.

CUT

Single-Line Precision Trim

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Cleanup Logic

• Draw a temporary line to trim all objects it passes through. Fast and precise.

DCAL

Pro Airflow Calculator & Sizer

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Engineering Logic

• Sizing suite for CFM/LPS. Generates engineering labels with unit scaling.

D2E

Double Elbow Branch (Same-Side)

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Branching Logic

• Draws two parallel elbows from one side of the main duct for grouped branches.

DD

Dynamic Duct Runner

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Drafting Logic

• Continuous point selection to draw long parallel duct runs with auto-labeling.

DTE

Opposite Double Elbow Tee

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Symmetry Logic

• Splits a main duct into two opposing elbows for balanced airflow.

E1

Manual Elbow (4-Point Connection)

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Point Logic

• Manual 4-point click order (Outer1, Inner1, Inner2, Outer2) for non-standard bends.

E4

Smart Elbow Selection

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Smart Logic

• Window-select 4 lines and let the software calculate radius and draw the elbow instantly.

ECP

Smart End-Cap

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Closing Logic

• Closes open duct ends and auto-stretches lines to ensure a square finish.

FLX

Professional Flex-Duct Generator

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Automation Logic

• Path Conversion: Converts existing Polylines or Splines into realistic, high-detail flexible duct patterns.
• Custom UI: Features a dialogue box to set the **Diameter**, **Layer**, and **Color** before generation.
• Clean Finish: Automatically smooths the path to ensure the "Easy Look" required for professional HVAC shop drawings.

MD

Full Path Multi-Duct

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Automation Logic

• Convert a single polyline path into a fully labeled 2-line duct system.

RD

Automatic Reducer/Transition

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Transition Logic

• Draws transitions between two different duct sizes (Symmetric or Flat-One-Side).

RDY

Reducing Y-Fitting

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Compact Logic

• A combined reducer and branch for tight ceiling spaces where standard shoe branches won't fit.

SUM

Airflow & Value Totaller

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Numeric Logic

• Select several numeric labels to get an instant sum. Essential for checking branch totals.

VCD

Dynamic Volume Damper

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Block Logic

• Automatically inserts a VCD block scaled to the exact width of your duct lines.