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![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fc40830b0-46a9-4258-b632-c846f426ef8f%2FUntitled.png?id=ae87870c-b730-4538-a60d-1d6003db915c&table=block)
PHASE 1: Building Envelope
Optimal EUI: 53.0
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F60dcc4fc-5d78-4d7f-b5a5-09f0a6027e57%2FUntitled.png?id=56522f9d-8240-4354-a268-4c2cd8f8f825&table=block)
Recommended Settings:
- Building Orientation: 135 degrees
South (side)
- WWR Southern Walls: 95%
- Window Shades South: 1/4 Win Height
- Window Glass South: Trp LoE
North
- WWR Northern Walls: 0%
- Window Shades North : Full range
- Window Glass North: Full range
West
- WWR Western Walls: 30%
- Window Shades West: BIM
- Window Glass West: Trp LoE
East
- WWR Eastern Walls: 95%
- Window Shades East: BIM
- Window Glass East: Trp LoE
PHASE 2: Envelope + Power & Lighting
Optimal EUI: 47.1
With just three internal building features changed we already reduce the EUI by 5.9 kBtu/ft2/yr. This is a great reduction in the long run for operational energy savings.
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F26c57873-f0aa-4fd5-b801-26cd6811c111%2FUntitled.png?id=35988c67-7972-4c56-8861-4b1e12cb3916&table=block)
Recommended Settings:
- Lighting Efficiency: 0.3 W/sf
- Daylight & Occupancy Controls: Daylight & Occupancy Controls (setting)
- Plug Load Efficiency: 0.6 W/sf
PHASE 3: Envelope + Lighting + Photovoltaics
Optimal EUI: 4.88
Considering the addition of photovoltaics the EUI is reduced immensely. With optimal conditions for rooftop solar, EUI is reduced by as much as 39.82 kBtu/ft2/yr. Granted, this assumes a 90% rooftop area available for solar, the most efficient panels, and the best purchase plan —perhaps a bit unrealistic.
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fb91f17f3-f1ec-4040-981d-cf74ccee4742%2FUntitled.png?id=8a6aad86-3c12-4cab-b4b7-f6124a3f1a8f&table=block)
Recommended Settings:
- Panel Efficiency: 20.4%
- Payback Limit: 20 yrs
- Surface Coverage: 90%