Hello, My house has a 18 year old forced air heating system. It works trouble free since we moved in at 2000. It does not have an electrostatic air filter. I have been using the best 3M filters. The thermostat keeps tracking the hours of use of the filter. When the heater blows air, my nose can feel some kind of discomfort. It is worse when a filter works for 200 hr and more. I am thinking to install an electrostatic air filter, but do not know if it is better enough to get rid of the discomfort. It may need some duct work to put an electrostatic filter. So the first thing I need to find out is how much better an electrostatic air filter is than a 3M Ultra Allergen 1250 filter? Thanks.