Some examples of green technologies
Lighting is shown indisputably as the easiest system to replace and moreover, the period of return on investment is often limited to only a few months. It is now well-known that the incandescent bulbs can be replaced by fluocompact bulbs which consume 75% less electricity. On the other hand, few people know that the fluorescent lamps of the T12 type can be replaced by new lamps of the T8 or T5 type, which are much more efficient. With these simple measures, substantial savings can be realized.
With the rigorous winters that Quebec knows, the costs of heating represent another important expenditure. To take again our example, according to the Energy Efficiency Office, these expenses can account for 64% of energy consumption of the residential sector. However, simple systems can contribute to reduce these costs. Here are some examples:
- Programmable electronic thermostats: now within everyone’s range, they are used more and more and they guarantee an immediate impact.
- Condensation boilers driven by natural gas: a majority of buildings with residences still count on boilers with natural gas and on obsolete fuel oil offering an efficiency oscillating between 60% and 80%. However, some condensation boilers available on the market can offer more than 95% of efficiency. The condensation boiler is a boiler having the characteristic of benefiting from the heat of steam contained in exhaust fumes, by condensing these vapors before rejecting the water in liquid form. Thus, the output of such a boiler is much higher than the traditional boilers.
- Heat recovery systems of gray water: these systems make it possible to extract heat from the hot water which is rejected towards the sewers of the city and to reinject this same heat to preheat the entry of cold water forwarded to the domestic water-heater.
With a period of return on investment which varies between one and four years, all these measures should be adopted for all the types of buildings.
In addition, renewable energies are also shown to be very interesting for real-estate owners. If geothermics and photovoltaic panels gain in popularity, other efficient and less expensive technologies have been developed during the last few years, such as solar collectors.
The solar collectors “in vacuum”, still relatively little known, are composed of a series of tubes made out of glass from approximately 5 to
Towards a greener and sustainable Quebec
“All the while benefiting from subsidies being able to reach up to 40% of the costs of modernization, owners of residential buildings can optimize the energy efficiency of their buildings and hope for a return on excessively fast investment.