Canadian passive house, Casa TortugaCasa Tortuga takes its name from a turtle that fell on the site that Marilynn and Arlene chose for their Certified Passive House retirement home.

Nestled in the trees overlooking the water near Black Rapids, the site is challenged with the balance VERT of natural beauty and energy savings through resilient design. The result of the solar pathfinder photo lead to the felling of some evergreen trees to the south. Despite this effort the house is still heavily shaded, which tipped the scales to the insulation side.

A connection between indoors and outdoors produced the 6’ deep wrap around porch that, in cahoots with the trees, dramatically reduces the cooling demand of this home. The intended addition of PV will likely see this project get very close to Net-Zero Energy.

STANDARD Passive House
LOCATION Lyndhurst, ON
TYPE Attached Single Family
YEAR COMPLETED 2015
PROJECT TEAM
PH CONSULTANT Stephen Magneron (Homesol Building Solutions)
smagneron@homesol.ca
 DESIGNER Chris Straka (Vert Design)
chris@vertdesign.ca
 BUILDER Mark Raison – Crane Building Services mraison@xplornet.ca
LIVING AREA 2,422 ft²
HEAT DEMAND 13.6 kWH/(m².a)
HEATING LOAD 7,700 BTU/hr
COOLING DEMAND 3.2 kWh/(m².a)
PRIMARY ENERGY 82 kWh/(m².a)
AIR TIGHTNESS 0.34 ACH (pre-insulation)
VOLUME 20,420 ft³
SLAB Concrete/XPS R-71
ABOVE GRADE WALLS 2×6 w 16” I-joist R-83
BELOW GRADE WALLS 2×6/Concrete/EPS R-76
CEILING Wood truss/PIC/Cellulose R-88
VENTILATION Zehnder ComfoAir 550 Eff. 84%
WINDOWS Gaulhofer EnergyLine Plus 85 South-SHGC = 0.61 Ug = 0.60 W/(m²K)
N,E,W-SHGC = 0.51 Ug = 0.50 W/(m²K)
 
HEATING/COOLING Fujitsu Ductless Mini-Splits – 2 indoor heads
HOT WATER TBD
RENEWABLES TBD