Walden Pond Visitor Center
Walls and Roof
The walls are typical wood framed with cavity insulation. An additional layer of continuous exterior insulation was provided on the outside of the wall framing. The roof was constructed of SIPs. Below grade foundation walls and slab had continuous insulation with full basement areas having an additional interior insulation layer. Basement/crawlspace ceilings were insulated as well. A high performing triple-paned window/door system was installed for openings.
Subslab assembly
Foundations were cast-in-place concrete with a continuous vapor barrier and 2" of rigid insulation.
Subslab R-value
10.0
Slab edge assembly
The edge of the slab consists of a 1" thermal break fully insulated.
Slab edge R-value
5.0
Foundation wall assembly
Foundation walls are cast-in-place concrete with 3" continuous insulation down to the footing, waterproofing layer and drainage board leading to a footing drain.
Foundation wall R-value
15.0
Above grade wall assembly
2x6 wood framing at 16" o.c. with full cavity cellulose insulation. 1/2" plywood sheathing installed over studs with additional 3" continuous insulation. An additional layer of 1/2" plywood was installed and then building felt and wood siding with a ventilation mat.
Above grade wall R-value
39.3
Flat attic assembly
N/A
Cathedral ceiling assembly
N/A
Roof Assembly
Metal standing seam roof over high temp underlayment and plywood deck. 1" ventilation space over approx 12" SIP panel with polyiso insulation.
Roof R-value
60.0
Windows and Doors
Window Assembly:
European Larch windows by Buildau and Bussmann. Triple pane glazing. Mix of hoppers, casements and fixed windows. Sliding and swing doors.
Door Assembly:
Same as above.
Average window U-factor
0.17
Solar Heat Gain Coefficient
0.50
Visible Light Transmittance
0.74
Door U-Factor
0.17
Door Area
167 sq ft
Mechanical Systems
Space cooling - Manufacturer & Model
Mitsubishi PKFY-P08NHMU-E2 (3 units), Mitsubishi PKFY-P06NBMU-E2 (1 unit), Mitsubishi PKFY-P12NHMU-E2 (4 units), Mitsubishi PKFY-P18NHMU-E2 (2 units), Mitsubishi PLFY-P12NBMU-ER2 (1 unit), Mitsubishi PEFY-P36NMAU-E2 (1 unit), Mitsubishi PUMY-P36NHMU Condenser (1 unit) , Mitsubishi PUMY-P60NKMU Condenser (2 units)
Space cooling - capacity
47 kW
Space heating - Manufacturer & Model
Mitsubishi PKFY-P08NHMU-E2 (3 units), Mitsubishi PKFY-P06NBMU-E2 (1 unit), Mitsubishi PKFY-P12NHMU-E2 (4 units), Mitsubishi PKFY-P18NHMU-E2 (2 units), Mitsubishi PLFY-P12NBMU-ER2 (1 unit), Mitsubishi PEFY-P36NMAU-E2 (1 unit), Mitsubishi PUMY-P36NHMU Condenser (1 unit) , Mitsubishi PUMY-P60NKMU Condenser (2 units)
Space heating - capacity
53 kW
Domestic hot water - Manufacturer & Model
AO Smith - Sun-80
Domestic hot water - capacity
80 gal
Ventilation - Manufacturer & Model
RenewAire EV450IN
Lighting Manufacturer and Model
All LED fixtures by the following manufacturers: Tech Lighting, Beta Calco Inc., LaMar Lighting, Juno Lighting, Nora Lighting, Bega
Lighting Efficiency
0.6 w/sf
Mechanical Equipment Installation Details and Comments
During the course of construction QA/QC was undertaken through periodic review of installation by system designers. Upon system installation fundamental commissioning was undertaken to ensure that systems performed as designed.
Walls and Roof
The walls are typical wood framed with cavity insulation. An additional layer of continuous exterior insulation was provided on the outside of the wall framing. The roof was constructed of SIPs. Below grade foundation walls and slab had continuous insulation with full basement areas having an additional interior insulation layer. Basement/crawlspace ceilings were insulated as well. A high performing triple-paned window/door system was installed for openings.
| Subslab assembly |
Foundations were cast-in-place concrete with a continuous vapor barrier and 2" of rigid insulation. |
|---|---|
| Subslab R-value | 10.0 |
| Slab edge assembly |
The edge of the slab consists of a 1" thermal break fully insulated. |
| Slab edge R-value | 5.0 |
| Foundation wall assembly |
Foundation walls are cast-in-place concrete with 3" continuous insulation down to the footing, waterproofing layer and drainage board leading to a footing drain. |
| Foundation wall R-value | 15.0 |
| Above grade wall assembly |
2x6 wood framing at 16" o.c. with full cavity cellulose insulation. 1/2" plywood sheathing installed over studs with additional 3" continuous insulation. An additional layer of 1/2" plywood was installed and then building felt and wood siding with a ventilation mat. |
| Above grade wall R-value | 39.3 |
| Flat attic assembly |
N/A |
| Cathedral ceiling assembly |
N/A |
| Roof Assembly |
Metal standing seam roof over high temp underlayment and plywood deck. 1" ventilation space over approx 12" SIP panel with polyiso insulation. |
| Roof R-value | 60.0 |
Windows and Doors
Window Assembly:
European Larch windows by Buildau and Bussmann. Triple pane glazing. Mix of hoppers, casements and fixed windows. Sliding and swing doors.
Door Assembly:
Same as above.
| Average window U-factor | 0.17 |
|---|---|
| Solar Heat Gain Coefficient | 0.50 |
| Visible Light Transmittance | 0.74 |
| Door U-Factor | 0.17 |
| Door Area | 167 sq ft |
Mechanical Systems
| Space cooling - Manufacturer & Model | Mitsubishi PKFY-P08NHMU-E2 (3 units), Mitsubishi PKFY-P06NBMU-E2 (1 unit), Mitsubishi PKFY-P12NHMU-E2 (4 units), Mitsubishi PKFY-P18NHMU-E2 (2 units), Mitsubishi PLFY-P12NBMU-ER2 (1 unit), Mitsubishi PEFY-P36NMAU-E2 (1 unit), Mitsubishi PUMY-P36NHMU Condenser (1 unit) , Mitsubishi PUMY-P60NKMU Condenser (2 units) |
|---|---|
| Space cooling - capacity | 47 kW |
| Space heating - Manufacturer & Model | Mitsubishi PKFY-P08NHMU-E2 (3 units), Mitsubishi PKFY-P06NBMU-E2 (1 unit), Mitsubishi PKFY-P12NHMU-E2 (4 units), Mitsubishi PKFY-P18NHMU-E2 (2 units), Mitsubishi PLFY-P12NBMU-ER2 (1 unit), Mitsubishi PEFY-P36NMAU-E2 (1 unit), Mitsubishi PUMY-P36NHMU Condenser (1 unit) , Mitsubishi PUMY-P60NKMU Condenser (2 units) |
| Space heating - capacity | 53 kW |
| Domestic hot water - Manufacturer & Model | AO Smith - Sun-80 |
| Domestic hot water - capacity | 80 gal |
| Ventilation - Manufacturer & Model | RenewAire EV450IN |
| Lighting Manufacturer and Model | All LED fixtures by the following manufacturers: Tech Lighting, Beta Calco Inc., LaMar Lighting, Juno Lighting, Nora Lighting, Bega |
| Lighting Efficiency | 0.6 w/sf |
| Mechanical Equipment Installation Details and Comments |
During the course of construction QA/QC was undertaken through periodic review of installation by system designers. Upon system installation fundamental commissioning was undertaken to ensure that systems performed as designed. |