Fink-Simko Zero Net Energy Deep Energy Retrofit
Walls and Roof
The building envelope meets National Grid DER pilot house guidelines.
Subslab assembly
2 in XPS rigid foam (R-5/in) over existing concrete slab with drain mat below + 3/4 in plywood (R-1.25/in) flooring above.
Subslab R-value
10.9
Foundation wall assembly
2 in of XPS rigid foam (R-5/in) + 2 in of polyiso rigid foam (R-6.5/in), 3 in closed cell spray foam on rim joists, 0.4 in Spaceloft (R-10.3/in) used instead of polyiso near stairway to reduce thickness and maintain reasonable stair width
Foundation wall R-value
23.0
Above grade wall assembly
4 in of polyiso rigid foam (R-6.5/in) on exterior + 3.5 in of blown cellulose (R-3.4/in) in original wall cavities + 3/4 in plywood (R-1.25 /in) sheathing + 0.75 inch dead air space (R-1.0/in) + 0.5 inch gypsum board (R-0.9/in) + 5/16 in cement board siding (R-0.48/in)
Above grade wall R-value
40.2
Roof Assembly
Two 3 in polyiso rigid foam layers (R-6.5/in) + 5.5 in of blown cellulose (R-3.4/in) in roof rafter pockets + two 3/4 in plywood (R-1.25/in) sheathing layers + Asphalt shingles (R-0.44)
Roof R-value
60.0
Windows and Doors
Window Assembly:
R-8 Schuco SI82 U-PVC tilt & turn casement
Door Assembly:
2 First Floor Entry Doors - Fiberglass, Therma-Tru, R-4, R-5.3
2 Basement Entry Fire Doors - Fiberglass, Therma Tru, R-7.1 base door
On basement doors, added 0.4 in Spaceloft (R-10.3/in) + 2.0 in XPS (R-5/in) to achieve R-21.2
Door average Rval = 7.4
Door average U = 1/7.4 = 0.14
Average window U-factor
0.13
Solar Heat Gain Coefficient
0.50
Visible Light Transmittance
0.71
Door U-Factor
0.14
Door Area
72 sq ft
Mechanical Systems
Space cooling - Manufacturer & Model
Mitsubishi Mini Split MUZ-FE09NA (Outside) / MSZ-FE09NA (Inside)
Space cooling - capacity
3 kW
Space heating - Manufacturer & Model
Mitsubishi Mini Split MUZ-FE09NA (Outside) / MSZ-FE09NA (Inside)
Space heating - capacity
2 kW
Domestic hot water - Manufacturer & Model
GE GEH50DEEDSCA, EFR = 2.4
Domestic hot water - capacity
50 gal
Ventilation - Manufacturer & Model
Zehnder CA-350, 87% efficiency, measured balanced flow 61/95/155 cfm
Lighting Manufacturer and Model
Lighting Efficiency
Mechanical Equipment Installation Details and Comments
Blower door testing done both before and after DER completion to measure effect of air sealing measures.
CFM50 ACH50 EqLA(CFM/sq ft of enclosure)
Pre DER 2798 10.32 0.66
Post DER 434 1.43 0.09
Envelope
Air Changes per hour, ACH50
1.43 ACH50
Air Changes per hour, CFM50
434.00
Walls and Roof
The building envelope meets National Grid DER pilot house guidelines.
| Subslab assembly |
2 in XPS rigid foam (R-5/in) over existing concrete slab with drain mat below + 3/4 in plywood (R-1.25/in) flooring above. |
|---|---|
| Subslab R-value | 10.9 |
| Foundation wall assembly |
2 in of XPS rigid foam (R-5/in) + 2 in of polyiso rigid foam (R-6.5/in), 3 in closed cell spray foam on rim joists, 0.4 in Spaceloft (R-10.3/in) used instead of polyiso near stairway to reduce thickness and maintain reasonable stair width |
| Foundation wall R-value | 23.0 |
| Above grade wall assembly |
4 in of polyiso rigid foam (R-6.5/in) on exterior + 3.5 in of blown cellulose (R-3.4/in) in original wall cavities + 3/4 in plywood (R-1.25 /in) sheathing + 0.75 inch dead air space (R-1.0/in) + 0.5 inch gypsum board (R-0.9/in) + 5/16 in cement board siding (R-0.48/in) |
| Above grade wall R-value | 40.2 |
| Roof Assembly |
Two 3 in polyiso rigid foam layers (R-6.5/in) + 5.5 in of blown cellulose (R-3.4/in) in roof rafter pockets + two 3/4 in plywood (R-1.25/in) sheathing layers + Asphalt shingles (R-0.44) |
| Roof R-value | 60.0 |
Windows and Doors
Window Assembly:
R-8 Schuco SI82 U-PVC tilt & turn casement
Door Assembly:
2 First Floor Entry Doors - Fiberglass, Therma-Tru, R-4, R-5.3
2 Basement Entry Fire Doors - Fiberglass, Therma Tru, R-7.1 base door
On basement doors, added 0.4 in Spaceloft (R-10.3/in) + 2.0 in XPS (R-5/in) to achieve R-21.2
Door average Rval = 7.4
Door average U = 1/7.4 = 0.14
| Average window U-factor | 0.13 |
|---|---|
| Solar Heat Gain Coefficient | 0.50 |
| Visible Light Transmittance | 0.71 |
| Door U-Factor | 0.14 |
| Door Area | 72 sq ft |
Mechanical Systems
| Space cooling - Manufacturer & Model | Mitsubishi Mini Split MUZ-FE09NA (Outside) / MSZ-FE09NA (Inside) |
|---|---|
| Space cooling - capacity | 3 kW |
| Space heating - Manufacturer & Model | Mitsubishi Mini Split MUZ-FE09NA (Outside) / MSZ-FE09NA (Inside) |
| Space heating - capacity | 2 kW |
| Domestic hot water - Manufacturer & Model | GE GEH50DEEDSCA, EFR = 2.4 |
| Domestic hot water - capacity | 50 gal |
| Ventilation - Manufacturer & Model | Zehnder CA-350, 87% efficiency, measured balanced flow 61/95/155 cfm |
| Lighting Manufacturer and Model | |
| Lighting Efficiency | |
| Mechanical Equipment Installation Details and Comments |
Blower door testing done both before and after DER completion to measure effect of air sealing measures. |
Envelope
| Air Changes per hour, ACH50 | 1.43 ACH50 |
|---|---|
| Air Changes per hour, CFM50 | 434.00 |