Heat pumps provide cooling in the summer and supplement heating in the winter. Choose from top quality products by Lennox, York, Carrier and Trane. Dual Energy Under the dual energy system, you use fuel (usually oil) to heat your home during certain critical periods when the demand on Hydro-Québec’s power system is very high. These “peak periods” generally occur during the coldest days of winter. Dual energy heating therefore plays a major role in the wise use of our energy resources. Click here to view brochure (PDF)
