Natural gas furnaces are generally the most efficient and cost-effective type of home heating today. Efficiency ratings have improved considerably in recent years and prices have come down as well, allowing for lower year-round heating costs for the average homeowner. Carrier Infinity furnaces lead the industry in efficiency and comfort. These furnace can run on propane, although it is not as cost effective as natural gas. Alternatives such as heat pumps have come a long way too. They are a great choice for locations where natural gas is not available. Ground source heat pumps while quite efficient are the most expensive to install and have a lengthy return on investment. Today’s air source heat pumps have shown efficiencies near ground source without the extreme investment. This technology is proving to be adequate even with our cold Canadian winters. Carrier’s GreenSpeed heat pumps are often eligible for rebates from your utility supplier.