Echo Lake Residence
Walls and Roof
The general approach was to employ "super insulated" walls, attic and sub-slab insulation levels, combined with aggressive attention to air sealing during construction.
Subslab assembly
The slab on grade main floor is a 4" concrete slab poured over 8" of XPS insulation (R-40)
Subslab R-value
40.0
Slab edge assembly
The slab edge is supported by a 6" core ICF stem wall (R-23)
Slab edge R-value
23.0
Foundation wall assembly
The foundation is a 6" core ICF stem wall atop a continuous concrete strip footing.
Foundation wall R-value
23.0
Above grade wall assembly
All exterior above grade walls are 11-7/8" double stud walls with 2x4 inner and 2x6 outer studs aligned @ 16" on center. The cavities were filled with dense packed cellulose.
Above grade wall R-value
43.0
Flat attic assembly
The attic is insulated with 18" of blown cellulose insulation.
Flat attic R-value
60.0
Windows and Doors
Window Assembly:
The windows are Inline fiberglass, tilt-turn and fixed units with insulated fiberglass frames.The IGU's are tri-pane assemblies with warm edge spacers and various coatings depending on glass orientation.
Door Assembly:
Exterior doors are insulated fiberglass units. The patio door is a tilt-turn unit to match the window unit's performance and glazing specification. The entry door is an insulated fiberglass unit with dual pane 1/4 lite glass.
Average window U-factor
0.21
Solar Heat Gain Coefficient
0.25
Visible Light Transmittance
0.39
Door U-Factor
0.21
Door Area
40 sq ft
Mechanical Systems
Space cooling - Manufacturer & Model
Geothermal heat pump, GeoThermal - 034
Space heating - Manufacturer & Model
Geothermal heat pump, GeoThermal - 034, 36,200 BTUH, COP 3.0, EER 14.6, three 180 foot deep closed loop wells
Domestic hot water - Manufacturer & Model
Heat pump de-superheater
Domestic hot water - capacity
105 gal
Ventilation - Manufacturer & Model
Balanced ERV, RenewAire EV130, 130 CFM, set to run 20 min/hr with HSO switches in bathrooms.
Lighting Manufacturer and Model
Lighting Efficiency
Mechanical Equipment Installation Details and Comments
All mechanicals are within the conditioned space. Energy star lighting.
Envelope
Air Changes per hour, ACH50
0.47 ACH50
Air Changes per hour, CFM50
Walls and Roof
The general approach was to employ "super insulated" walls, attic and sub-slab insulation levels, combined with aggressive attention to air sealing during construction.
| Subslab assembly |
The slab on grade main floor is a 4" concrete slab poured over 8" of XPS insulation (R-40) |
|---|---|
| Subslab R-value | 40.0 |
| Slab edge assembly |
The slab edge is supported by a 6" core ICF stem wall (R-23) |
| Slab edge R-value | 23.0 |
| Foundation wall assembly |
The foundation is a 6" core ICF stem wall atop a continuous concrete strip footing. |
| Foundation wall R-value | 23.0 |
| Above grade wall assembly |
All exterior above grade walls are 11-7/8" double stud walls with 2x4 inner and 2x6 outer studs aligned @ 16" on center. The cavities were filled with dense packed cellulose. |
| Above grade wall R-value | 43.0 |
| Flat attic assembly |
The attic is insulated with 18" of blown cellulose insulation. |
| Flat attic R-value | 60.0 |
Windows and Doors
Window Assembly:
The windows are Inline fiberglass, tilt-turn and fixed units with insulated fiberglass frames.The IGU's are tri-pane assemblies with warm edge spacers and various coatings depending on glass orientation.
Door Assembly:
Exterior doors are insulated fiberglass units. The patio door is a tilt-turn unit to match the window unit's performance and glazing specification. The entry door is an insulated fiberglass unit with dual pane 1/4 lite glass.
| Average window U-factor | 0.21 |
|---|---|
| Solar Heat Gain Coefficient | 0.25 |
| Visible Light Transmittance | 0.39 |
| Door U-Factor | 0.21 |
| Door Area | 40 sq ft |
Mechanical Systems
| Space cooling - Manufacturer & Model | Geothermal heat pump, GeoThermal - 034 |
|---|---|
| Space heating - Manufacturer & Model | Geothermal heat pump, GeoThermal - 034, 36,200 BTUH, COP 3.0, EER 14.6, three 180 foot deep closed loop wells |
| Domestic hot water - Manufacturer & Model | Heat pump de-superheater |
| Domestic hot water - capacity | 105 gal |
| Ventilation - Manufacturer & Model | Balanced ERV, RenewAire EV130, 130 CFM, set to run 20 min/hr with HSO switches in bathrooms. |
| Lighting Manufacturer and Model | |
| Lighting Efficiency | |
| Mechanical Equipment Installation Details and Comments |
All mechanicals are within the conditioned space. Energy star lighting. |
Envelope
| Air Changes per hour, ACH50 | 0.47 ACH50 |
|---|---|
| Air Changes per hour, CFM50 |