Poorly insulated windows leads to air leakage

This modern home was built in the 1950s and hasn’t had many replaces in the years since.

I bought it last year and I’ve slowly renovated each room, starting with the study room.

I created an island with an oven and a range, along with a dishwasher to the left. The sink stayed in the same locale, mainly for retaining the original simplicity of the stock plumbing setup. I appreciate proper ventilation pipes for sinks and showers instead of air admittance valves, which inevitably fail when you least expect them to. And you won’t think if the air admittance valve is broken unless you start to odor sewer gasses in your home, which is problematic. With proper ventilation pipes you don’t have to worry about flimsy AAVs and trying to find a broken one in a lake house that has at least 10 of them in numerous locations. Builders are lazy nowadays and want to save money on the ventilation pipes going to the roof. They also know it looks “unreasonable” to have that many pipes shooting out of one’s roof, but it’s a necessary evil if you have half a dozen sinks and a separate laundry room. The last thing I replaced were the leaky windows with terrible insulation. They were leading to energy waste whenever I’d use the cooling system or heating system. If it was summer, tepid air would leak in and force the cooling system to run longer than necessary. In the Winter time the tepid air would escape outside and cause the opposite effect with the heating system this time around.

Air purification help