I notice that a lot of new construction standards have all kinds of very tight, thick insulation standards which is great for saving energy, but do I really care about this if I am ventilating the house?
For example, if the house is getting 4 air changes per hour, insulation doesn't really seem to matter because I am bringing in freezing cold air into the house constantly, so the amount of cold coming in through the ventilation system will be way higher the amount of cold coming through the walls/windows. So, why even worry about insulation?
I live in New England where temperatures easily get to -10 degrees F and below in the winter and up to 95-100 F in the summer.
In my current (old) house, I have forced hot water heating and no ventilation system at all, but the house is so leaky that I get air coming in through the cracks and crannies. So, lets say I am getting 2 ACH by leakage in my current house. Would that mean I am actually going to be spending twice as much heating a new house which has 4 ACH forced air ventilation?