Mechanical Drafting, HVAC Workflows, and Free Tools

This side of O.B & CO. focuses on practical HVAC drafting support, coordination-ready documentation, and utility tools that help speed up field and design decisions. I also use pyRevit to build tailored tools specific to HVAC industry workflows and Revit drafting tasks.

Mechanical Drafting

  • Drafting support for mechanical and building services documentation.
  • Cleaned-up drawing sets for clearer handoff between concept and install.
  • Revisions from markups with practical constructability focus.

HVAC-Focused Work

  • Ducting layout support and drawing coordination.
  • Dimension, spacing, and service-routing clarity across sheets.
  • Workflow tooling to reduce repetitive checks in design prep.

Workflow Mindset

  • Build tools that save time for common calculation and sizing tasks.
  • Create tailored pyRevit tools specific for HVAC workflows and drafting tasks.
  • Share useful utilities publicly when they can help others do better work.
  • Keep outputs practical for on-site and fabrication communication.

Custom Revit + pyRevit Toolbar Tools

Custom pyRevit toolbar screenshot showing HVAC duct tool commands
Toolbar workflow built for practical duct drafting actions and repetitive HVAC production tasks.
Custom pyRevit toolbar screenshot showing advanced duct and connection commands
Tailored command grouping for faster access to HVAC drafting and connection routines.
Custom pyRevit toolbar screenshot with HVAC-specific utility tools
Workflow-specific pyRevit tools designed for day-to-day mechanical drafting tasks.
Custom pyRevit toolbar screenshot featuring duct sizing and fitting helpers
HVAC-focused helpers for duct layout, fitting placement, and drafting consistency.

Free HVAC Tool

Duct Calculator by JR440. Use it free in your browser.

Open Duct Calculator