TowerWise.ca Energy savings in Multi-suite residential buildings: Case Studies TEEAC Meeting November 3 rd, 2011

Outline New Construction Appleby Woods Combined Heat and Power Bloor Street

Appleby Woods Design Objectives: Reduce operating costs through good building design Conservation Renewable Energy Sources 101 condominium suites

Appleby Woods Building Envelope Insulated concrete forms Low window-to-wall ratio

Appleby Woods PV Generation Grid-tied, roof-mounted PV system Stand-alone LED parking lot lighting units

Appleby Woods Ground Source Heat Pump System 54 boreholes in the parking lot Hydronic loop Suite-based water-to-air heat pump and fan

Appleby Woods Other features Dual flush toilets Energy Star appliances Low-e argon-filled windows Motion-sensor parking garage lighting in stalls

Appleby Woods Costs Total Project Cost $22M Cost of GSHP System $1.8M Cost of Solar PV System $450K Cost of Solar Parking Lot LED Lighting $178K Unit purchase price lower than area average by 25% Monthly fee lower than area average by 60%

Bloor Street Pre-Retrofit Situation: 326 rental suites Built in 1980 Needed to replace emergency power system Pilot CHP system

Bloor Street Design and Installation 335kW electrical output 1.4MMBTU thermal output Housed in a 40ft container located on the roof Commissioned in July 2009

Bloor Street Energy Performance

Bloor Street Projected Financial Performance Scenario Est. Annual Program Revenue Simple Payback 15 year ROI IRR over 15 years Net Present Value in 2010 Energy Cost Savings Alone - 13 years 17%2%-$408,000 With DR3 Revenue $48, years 65%6%$24,000 With CHPSOP Revenue $116,000 7 years 130%11%$618,000 CHP System supplies about 40% of annual electrical demand while producing waste heat

Lessons Learned New Construction Low energy features for less Combined Heat and Power Detailed planning process

For More Information Energy Retrofit Case Studies on the TowerWise Website