GJ / year
ACH @ 50 Pa
Electric primary systems
Fuel source
A 1970s home, rebuilt for a Net Zero future.
GJ / year
ACH @ 50 Pa
Electric primary systems
Fuel source
A 1970s home, rebuilt for a Net Zero future.
The transformation
Before / After

BEFORE RENOVATION
113 GJ / year
Existing home performance

AFTER RENOVATION
Net Zero
Produces as much energy as it uses annually
How it performs
What changed.
01
Building Envelope
WINDOWS
Triple glazed, dual low-E & argon
WALLS
R14 Roxul + R36 exterior reclaimed foam
CEILING
R50 spray foam / R77 blown-in attics
AIRTIGHTNESS
0.74 ACH @ 50 Pa after renovation
02
Mechanical Systems
HEATING + COOLING
Air-source heat pump + electric furnace
WATER HEATING
Electric heat pump
VENTILATION
High-efficiency HRV
03
Renewable Energy
PV SYSTEM
12.24 kW solar array
ENERGY MONITORING
Whole-home energy monitor
RESULT
Annual production offsets annual energy use
Project story
“Net Zero wasn’t one giant leap. Each efficiency decision made the next one possible.”
Performance through practical decisions.
The story section can carry a homeowner, builder or project-team testimonial, followed by a short explanation of the goals, constraints and decisions that shaped the renovation.