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Case Study Exercise

Discover how to improve energy efficiency and tenant comfort in The Manor, a 2-story garden-style building with 84 units. Addressing infiltration issues and high tenant bills, this case study explores low-hanging fruit solutions for both tenants and the owner.

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Case Study Exercise

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  1. Case Study Exercise

  2. The Manor • Size • 2 Stories, Garden Style, 84 Units • 75,602 square feet • Age: 1984 • Built in phases • Structure • Concrete block walls • Concrete slab floors and wood framing roof • Brick veneer cladding • Occupancy: Seniors, with rent and utility subsidies • Utilities • Common areas are metered for electric and gas. Tenants are direct-metered for electric heat and domestic hot water.

  3. Apartment Heating & Cooling • Electric PTACs in the units for apartment heating & cooling plus electric baseboard in the bath

  4. DHW Maker Apartment DHW • Electric DHW makers in each unit

  5. Solenoid air valve Super adjusts dial to control boiler Broken Boiler & Controls • Gas-fired Weil-McClain hot water boiler for common areas supplies heat to ceiling units with 100% outdoor air and baseboard radiators • Broken pneumatic controls and no thermostats

  6. Boiler Hot water piping Ceiling Heating Unit Outdoor Air Inlet Duct delivering 100% outdoor air Common Area Heating

  7. Vent connecting crawlspace to outside Apartment window with broken seal and unknown material settled in between panes. Envelope

  8. Outside view of typical windows Envelope

  9. Existing building B drop ceiling in hallway. Viewpoint up mansard. Missing soffit vent allows insects and pests to enter attic space. Ceiling access panel Roof/ Ceiling

  10. Inoperable mechanical system that is a thermal bridge to the roof. Inoperable vents Inoperable mechanical fan. Inoperable supply air unithandler. Inoperable equipment is a thermal bridge to the roof. Photo taken from inside roof cavity of a roof drain. Super stated two of the drains leak within the building. . Air Leakage

  11. Mechanical room for community space Roof vent Air Leakage

  12. Lighting & Appliances • All lights were T12 or incandescent • The building manager had taken out bulbs of every other fixture in the hallways • Appliances were mostly original (1987)

  13. 3.66 BTU/sf/HDD

  14. Electric: $0.135/kWh

  15. What can we do in a building that runs at 3.66 BTU/sf/HDD but has serious infiltration issues and high tenant bills?

  16. What’s the low hanging fruit for the tenants?

  17. What’s the low hanging fruit for the owner?

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