Design envelope

Compared to an OBC required envelope, develop a high-performance envelope at least incrementalcost.The following is based on a square 2-storey building, plus basement, with 10 m per side, 2.5 heightper floor, with basement floor being 1.5 m below grade.Design the following typical building assemblies as OBC compliant and high-performance whilecontrolling moisture:Roof (100 m2, attic or flat roof)Above grade wall (260 m2, including windows)Glazing & overall window (window area 25 m2, average window size 1.5 m2)Below grade wall (60 m2)Basement slab (100 m2)For the high-performance cases, thermal bridging is to be minimized by design.For the high performance cases, assume a tested airtightness of 1.0 air change per hour (ACH) canbe achieved.For below grade walls and slab the control of the water table and proper drainage needs to beaddressed.For the areas above, calculate the OBC compliant design day heat loss for Toronto. Develop twohigh-performance thermal envelope cases which meet an overall envelop heat loss of 5 kW.Winter Indoor conditions are 21C and 40 % RH (relative humidity).Summer indoor conditions are 25C @65% RH (for summer moisture considerations in basement)Deep ground temperature is 10C.At least the following topics should be adequately covered in the assignment report:List of components or labeled graphic of each opaque wall assemblyFor whole opaque building assembly, calculation of effective R-valuesCalculation procedure for below grade heat loss.For glazed areas, glazing and whole window characteristics and R-valuesCost of assembly per m2 and of whole building for each caseFor each assembly, calculation for locating dewpoint, and location and type of vapourretarder (barrier)For each opaque assembly locate the air barrier(s) and discuss/illustrate how these aremade continuous at window openings.Below grade drainage description