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. |
Envelope
| Air Changes per hour, ACH50 | 1.43 ACH50 |
|---|---|
| Air Changes per hour, CFM50 | 434.00 |