Export to COMcheck-Web, step by step

Overview: Revit to COMcheck export. Export building-envelope data from a Revit model with BIM Pro AI, upload the .cxl file to legacy COMcheck-Web, and generate the Envelope Compliance Certificate. Screenshots use the demo model BIMPRO-Warehouse-Office (one warehouse area and one office area). Click any screenshot to open it full size.

Before you start

• Revit is open with your model and the add-in installed (see Quick start). The docked panel BIM Pro AI Mission Control is visible, with tabs 1 Setup, 2 Scan, 3 Scope, 4 Preview, 5 Export.
• The model has an Area Plan whose areas define the spaces to report. In the demo: FIN. FLR - AREA, with areas 1 - WAREHOUSE and 3 - OFFICE.
• You have a COMcheck-Web account. BIM Pro AI works with legacy COMcheck-Web. The new tool requires lighting before it will export reports.

Step 1Set the imported project information(Setup)

Do:

On 1 Setup, check the fields under Imported project information and pick the required values.

What you see:

Project type* (e.g. New Building), Project title, Location, Code edition* (e.g. 90.1 (2013) Standard), Envelope family (e.g. Industrial shell), Envelope phase scope (e.g. New Construction phase only). Fields marked * are required.

Result:

Until every required setting is complete, Next stays disabled and the panel lists what is missing under “Complete required settings”.

Step 2Complete the required settings and pick the Area Plan(Setup)

Do:

Scroll to Required settings, choose the categories, select the Area Plan, check the areas to include, then click Next.

What you see:

Finish grade plane elevation from civil site (ft)*, Building category* (e.g. Nonresidential), Conditioning category* (e.g. Semiheated), U-factor source* (e.g. Revit extracted), Spatial ownership source (Area plan)*. Open the Area Plan in Revit and click Use active Revit view, or pick it from the list and click Open selected plan. Then check the areas (e.g. 1 - WAREHOUSE, 3 - OFFICE). Site/Permit, Owner/Agent, and Designer/Contractor are optional and appear on the compliance report.

Result:

The panel confirms the plan (e.g. Opened “FIN. FLR - AREA” (Area plan)). Checked areas are saved with Setup and included on the next scan. Next becomes available.

Step 3Run the model scan(Scan)

Do:

On 2 Scan, click Run scan and leave Revit alone until it finishes.

What you see:

The panel warns: “You cannot use Revit during the scan. Wait for progress to finish; do not switch documents or start other Revit work until the scan completes.”

Result:

The button changes to Scanning… and shows progress (e.g. “Extracting Revit envelope data (Walls). 40 / 173”). Next stays disabled until the scan completes.

Step 4Review Model QA(Scan)

Do:

When the scan completes, review the Model QA results, then click Next.

What you see:

Status line “Scan complete – <n> element(s) – <project>”; Model QA tabs Passed, Warnings, Serious; Re-scan; Next.

Result:

In the demo: 173 elements, 47 passed, 0 warnings, 0 serious. Each check is listed with its result (e.g. “1.1 – Program spaces placed: pass, required”). You may need small changes in the Revit model to improve accuracy before continuing to Scope.

Step 5Confirm the rooms and compute the envelope(Scope)

Do:

On 3 Scope, confirm the envelope categories and rooms are checked, then click Compute Envelope.

What you see:

Category checkboxes (Floors & slabs, Roofs, Openings); Select rooms table with Name, Conditioning, SF (in the demo: 1 - WAREHOUSE, Semiheated, 72,182 SF; 3 - OFFICE, Conditioned, 3,010 SF).

Result:

The button shows Computing… with progress. When done, the section shows a green check and the button reads Recompute Envelope.

Step 6Optional: check the envelope in 3D(Scope)

Do:

Under Review / 3D, click Show in Revit 3D to see the computed envelope, then click Next.

Result:

Revit opens the 3D view “BIM Pro AI - COMcheck” with Temporary Hide/Isolate on, showing the computed spaces in color (in the demo, the office in blue and the warehouse in magenta).

Step 7Review the envelope values(Preview)

Do:

On 4 Preview, review the building areas and envelope values, then click Next.

What you see:

Building area table (Conditioning, Building use, Floor area); Envelope values with type filters (All, Ext. Wall, Int. Wall, Window, Door, Roof…) and orientation filters (All, N, W, E, S); the component count (26 in the demo).

Result:

Each component lists its area and values, e.g. “East Wall – Office (Interior Energy Wall – Steel Frame) 1,741.67 ft², U 0.0526, Rcont 0, Rcavity 19.004”. Expand a component to see its child openings.

Step 8Download the CXL(Export)

Do:

On 5 Export, click Download CXL.

What you see:

The Export tab lists the full checklist: download the envelope CXL, open legacy COMcheck-Web, log in, upload the project from My Projects, confirm values, review envelope assemblies, and check compliance.

Result:

A Windows Save As dialog opens.

Step 9Save the .cxl file(Export)

Do:

In Save As, pick a folder, keep or edit the file name, and click Save.

What you see:

Default file name in the demo: 2026-010_bimpro-warehouse-office_90.1_2013_standard_envelope. Save as type: COMcheck CXL (*.cxl).

Result:

The Export tab confirms the file was generated and where it was saved.

Step 10Open legacy COMcheck-Web(Export)

Do:

Click Start COMcheck-Web, then log in to your COMcheck-Web account if prompted.

Result:

Legacy COMcheck-Web opens in your browser at legacy-comcheck.energycode.pnl.gov.

Step 11Open the upload option(COMcheck-Web)

Do:

Click My Projects at the top right, then click Upload project from my computer…

Result:

An upload row appears with Browse… and Upload, and the note “You can upload COMcheck 4.0.6 or earlier project files (CXL and CCK) or GreenBuilding XML files.”

Step 12Browse to the .cxl and upload it(COMcheck-Web)

Do:

Click Browse…, select the .cxl you saved in step 9, click Open, then click Upload.

Result:

COMcheck-Web shows Loading project… and opens the project with the values from the file (in the demo, “2026-010 - BIMPRO-Warehouse-Office” on 90.1 (2013) Standard).

Step 13Review the ENVELOPE tab and check compliance(COMcheck-Web)

Do:

Open the ENVELOPE tab, review the assemblies, complete any remaining fields, then click CHECK COMPLIANCE.

What you see:

Columns: Component, Assembly, Orientation, Building Area Type, Fenestration Details, Construction Details, Gross Area or Slab Perimeter, Cavity Insulation R-Value, Continuous Insulation R-Value.

Result:

Each envelope component from Revit appears as a row (walls, doors, windows, roofs, floors), linked to its building area. CHECK COMPLIANCE opens the Calculate Compliance dialog.

Step 14Run Calculate Compliance(COMcheck-Web)

Do:

Tick “Check the box if you would like to calculate envelope compliance”, click Calculate Compliance, and wait.

What you see:

The dialog shows an estimated completion time (about four minutes in the demo).

Result:

When it finishes, the status bar shows the result. In the demo: Envelope Passes, +5%. Interior and Exterior Lighting show TBD.

Step 15Open the compliance report(COMcheck-Web)

Do:

Confirm the envelope result, click Reports at the top right, then click Your compliance report.

What you see:

The Compliance Report dialog also offers to e-mail the report and asks whether it will be submitted for approval.

Result:

The report PDF downloads and opens in the browser.

Step 16Review the Envelope Compliance Certificate(COMcheck-Web)

Do:

Review the PDF and save or print it as needed.

What you see:

The Envelope Compliance Certificate includes Project Information, Construction Site, Owner/Agent, Designer/Contractor, Building Area, and Envelope Assemblies.

Result:

The demo report is a 13-page PDF named like COMcheck-Web_compliance_report_<date>_<time>.PDF. Later pages include other certificates, such as Interior Lighting.

Updating after a model change

When the Revit model changes, repeat the export so COMcheck-Web gets current values:

1. On 2 Scan, click Re-scan and review Model QA.
2. On 3 Scope, click Recompute Envelope, then review 4 Preview.
3. On 5 Export, click Download CXL and save the new .cxl.
4. In COMcheck-Web, use My Projects → Upload project from my computer… to upload the new file, review the ENVELOPE tab, and run CHECK COMPLIANCE again.
5. Re-check any fields you completed by hand in COMcheck-Web. They may not carry over to a newly uploaded file.

Troubleshooting