With the 2012 Ontario Building Code deadline calling for homes to be 35% more energy efficient than homes that are built today, new home builders could be faced with the additional cost of installing higher end heating and cooling systems. And new home buyers may be looking at more sophisticated heating and cooling systems that require a higher level of expertise in maintenance and repairs. A practical alternative for both builders and new homebuyers is a bundled rental package that includes a water heater, along with a furnace, air conditioner, air handler or drain water heat recovery system. Since 2003,…