Ladner Townhouses

Delta, BC

Part 9 Step Code 3 Energy Modeling

MEUI

0–0 kWh/m²·yr

Energy improvement

0–0%

Units / buildings

0 units / 0 buildings

Project Overview

Seven townhouse buildings (three to three-and-a-half storeys) totaling 40 units at Central Ave, Delta, BC. Modelled gross floor area is ≈ 4,066 m² across 11 unit types. The Building Permit compliance path is BC Energy Step Code Step 3 for Part 9 buildings.

We used HOT2000 software to develop proposed and reference models per BCBC 2024 9.36.6 using 9.36.5 modeling standards. The study optimized envelope U-values, glazing SHGC/U-value, and heat-pump selections, and produced City of Delta permit documentation.

Project Data

Building Type	Townhouses (Part 9)
Stage	Building Permit
Address	Central Ave, Delta, BC
Buildings / Units	7 buildings, 40 units (11 types)
Modelled Floor Area	≈ 4,066 m²
Compliance Path	BCBC 2024 9.36.6 (performance) using 9.36.5 reference
Targets	MEUI ≤55; TEDI ≤35; ≥20% overall energy use improvement; ≥10% heat-loss reduction, ≤ 2.5 ACH @ 50 Pa (target)
Envelope	2×6 walls with R-24 batt (RSI≈3.40); roof R-30 polyiso; floor slab R-12.5 @ perimeter
Mechanical	ASHP heating/cooling (HSPF 10.4; SEER 15.7) + baseboard backup
Software / Weather	HOT2000 v11.13 b43 / Vancouver INTL, BC

Our Contribution

Whole-building energy model HOT2000 (v11.13 b43); 9.36.6 performance with 9.36.5 reference.
Parametric study FDWR/SHGC, U-values, airtightness, ASHP sizing.
Permit package inputs Step Code checklists, proposed & reference files, reports.

Key Results

MEUI range41–47 kWh/m²·yrAcross 7 buildings

TEDI range16–27 kWh/m²·yrArea-weighted per guideline

Improvement36–43%over reference (9.36.5)

Airtightness target≤ 2.5 ACH @ 50 PaFinal to be verified by test

ComplianceBC Energy Step Code 3City of Delta

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