Montreal Retrofit Workflow

Purpose: To perform a cost-benefit analysis comparing different levels of building retrofitting.

Methodology: Utilizes the INSEL monthly energy balance, CO2, and cost workflows as a base to calculate Energy, CO2 emissions, and Cost values for each retrofitting scenario.

Defined Scenarios:

R0 - Business as Usual: Represents the current state of the building. Energy systems are replaced at end-of-life with identical performance.

R1 - Envelope Improvement: Improves walls, windows, roof, and basement to meet current legislative standards.

R2 - Systems Optimization & PV:

HVAC systems are updated to an aero-thermal heat pump coupled with baseboard heaters for peak loads (combined seasonal COP of 2.79). Utilizes available roof space for Photovoltaics (PV), provided the shaded area is less than 30% of the total roof area. Panels are installed at a 35º slope.

R3 - Comprehensive Retrofit: A combination of scenarios R1 (envelope) and R2 (systems + PV).