What should you consider when buying a Residential Systems Furnace?

Unfortunately, there's no single store you can visit to compare different makes and models of furnaces when you need to replace your furnace. You will be working with a heating contractor, so do your homework.

Bigger is not always better.
Most heating systems in older homes are greatly oversized. To maximize energy efficiency, get the size that's right for you. Consider the climate, the size of your home, its orientation, construction material, insulation, protective trees and shrubs, whether it's open concept or compartmentalized, and the comfort habits of the occupants. Ask your contractor.

Consider the energy source.
Use our heating cost calculator to compare different energy sources available in your area.

Consider all the costs.
The sticker price of the furnace is just the beginning. Installation will also be an immediate cost. Over, the long run, think about operating costs such as maintenance and future fuel.

Energy Star logo

Look for the ENERGY STAR symbol as proof that you're buying the most energy-efficient furnace.

Compare EnerGuide ratings.
Compare the unit's EnerGuide rating to see how its annual fuel utilization efficiency rating with similar models.

Check also the unit's steady-state efficiency rating—an indicator of the furnace's maximum efficiency after it reaches its peak operating temperature. Take note of both and use them to compare one unit to another.

Consider a home energy evaluation.
An EnerGuide home evaluation is a service offered under Natural Resources Canada's EnerGuide Rating System.  A qualified adviser will conduct a detailed assessment of your home to check for air leaks, report on the home's energy performance, and suggest renovations that can help lower your energy costs. The adviser will issue an EnerGuide home evaluations rating that compares your home to similar homes in Canada.

Make some calls.
Heating companies are always willing to share information about their products. Call or visit to obtain product brochures.

Check with your local utility.
Other entities, such as local utilities, fuel suppliers and provincial or territorial regulatory offices may keep lists of qualified, registered and licensed contractors. Contact them for assistance.

Hire a pro.
Choose trained, certified technicians for your furnace installation. Contact us

source: http://www.nrcan.gc.ca/energy/products/categories/heating/furnaces/15777