Independent Case Study 1 - performed by Natural Gas Technologies Centre

NJ Management Services
14 storey apartment building; 94 suites; heated by two atmospheric hot water boilers

Results
10,768 m3 reduction in gas consumption; decreased heating costs over previous year by approximately 12.6%

Payback Period
1.8 years

Details

Numert Investments
10 storey apartment building; 109 suites; heated by two atmospheric hot water boilers

Results
16,886m3 reduction in gas consumption; decreased heating costs over previous year by approximately 11.3%

Payback Period
1.2 years

Details

Biddington Properties Inc.
14 storey apartment building, 184 suites, heated by atmospheric hot water boilers

Results
Reduced heating costs by 14.5%

Payback Period
1 year

Details

Medallion Properties
15 storey apartment buildings; 230 suites each; built in 1963; Toronto, Ontario; Heat Reflectors to address North side of building only

Results
Virtually eliminated ‘cold’ complaints; costs savings amount to over $8,000 annually; 12% reduction in heating costs

Payback Period
8 to 9 months

Metro Toronto Housing Corporation
15 storey apartment building; 379 suites; built in 1971; Scarborough, Ontario; primary/secondary heating loop with DHW fed from primary heating loop

Results
Primary and secondary heating loops reduced by 15° F; Comfort levels improved; 28% reduction in heating costs (1998/99 Vs. 2000/01); Over 121,000 m3 saved ($14,560 at
1999 prices / $38,828 in 2001)

Payback Period
1.3 years at $.12/m3 for natural gas

Details

Greenwin Property Management
2 multi-level residential buildings; free standing cast iron radiators; original windows; Toronto, Ontario
Heat reflectors installed in one building only

Results
Energy savings/comparison – with Heat Reflectors 26.0%; without Heat Reflectors -1.4%

Payback Period
less than 1 year

Belmont Properties
Five, 2 storey, 12 unit, brick apartment buildings;
built in 1958; Etobicoke, Ontario; original hot water boilers with
free-standing cast iron radiators

Results
Between 7% to 19.8% (different results per apartment)

Payback Period
under 2 years

Details

Heritage Building
2 storey, brick building; heated by atmospheric hot water boiler; free standing, cast iron radiators

Results
1,282 m3 reduction in gas consumption; decreased heating costs over previous year by approximately 16.74%; boiler temperature reduced by 20° F

Payback Period
2.38 years

Details