If the house is constructed of wood with wood or vinyl siding and no metal backed insulation then reception of the Canada digital tv stations are easy. Aim a NON Amplified indoor antenna at about 50 degree magnetic compass. Here are two indoor antennas that are NON Amplified , Channel Master CM4010 and Trek HDTVi <-- notice the ( i ) the HDTVi is a NON Amplified indoor antenna , DO NOT buy the HDTVa amplified antenna. Here is how to aim indoor antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. The indoor antenna must be on ground floor or higher , Not in a basement.