NECB 2025 Simple Trade-off Path Compliance Tool

Assembly Type	Max U-value
Walls (V-#)	0.210
Roofs (H-#)	0.162
Floors (H-#)	0.162

Compliance

Vertical --

0.00

Horizontal --

0.00

Status: --

Vertical Above-Ground Assemblies Auto-sync enabled

Proposed Building Assemblies (Vertical)

Tip: You can copy-paste each assembly values from the Compliance Table.

#	Assembly Name *	Area A_ip (m²) *	U-value U_ip (W/m²·K) *	U × A (W/K)	Actions

Proposed Total Heat Transfer Rate per Temperature Difference, Σ(U_ip × A_ip): 0.00 W/K

Reference Building Assemblies (Vertical) - Auto-synced from Proposed

U-values are based on NECB 2025 Table 3.2.2.2 Trade-off Path limits.

#	Assembly Name (Synced)	Area A_ir (m²) (Synced)	U-value U_ir (W/m²·K) *	U × A (W/K)
Reference Total Heat Transfer Rate per Temperature Difference, Σ(U_ir × A_ir):				0.00 W/K

Autofill Limit U-Value U_ir ▶▶

Horizontal Above-Ground Assemblies Auto-sync enabled

Proposed Building Assemblies (Horizontal)

Tip: You can copy-paste each assembly values from the Compliance Table.

#	Assembly Name *	Area A_ip (m²) *	U-value U_ip (W/m²·K) *	U × A (W/K)	Actions

Proposed Total Heat Transfer Rate per Temperature Difference, Σ(U_ip × A_ip): 0.00 W/K

Reference Building Assemblies (Horizontal) - Auto-synced from Proposed

#	Assembly Name (Synced)	Area A_ir (m²) (Synced)	U-value U_ir (W/m²·K) *	U × A (W/K)
Reference Total Heat Transfer Rate per Temperature Difference, Σ(U_ir × A_ir):				0.00 W/K

Autofill Limit U-Value U_ir ▶▶

Mandatory Compliance Questions

1. U_ip × A_ip ≤ U_ir × A_ir
NECB 3.3.1.2: The sum of the U-values multiplied by their respective areas for the proposed building shall be less than or equal to that of the reference building.

2. Thermal Bridging Included
NECB 3.1.1.7: U-values include thermal bridging effects for both proposed and reference buildings.

3. Sealed Calculations Supplied
All calculations are provided with professional seal as required by applicable regulations.

4. Area Matching Compliance
NECB 3.3.1.2.(1): Proposed and reference building assembly areas match for trade-off calculations.

5. Assembly Category Compliance
NECB 3.3.1.1.(3-4): Assemblies are traded only within allowed categories (vertical with vertical, horizontal with horizontal).

Note: All five questions must be answered "Yes" (checked) for the trade-off path to be compliant. Questions 1, 4, and 5 are automatically validated based on your input data.

Trade-off Compliance Summary

Calculation Results

Category	Proposed Σ(U×A)	Reference Σ(U×A)	Difference
Vertical Assemblies	0.00	0.00	0.00
Horizontal Assemblies	0.00	0.00	0.00
Total	0.00	0.00	0.00

Compliance Checklist

Export Options

Project Name

Project Number

Design Professional

Date

Selected Zone U-values: