Questions about ventilating the bedroom to reduce co2.
Hello,
My wife and I are expecting our child to be born sometime around december and we've bought this air monitor to check the humidity, temperature and co2(ppm) of the room.
After doing some research about the co2 values it seems that less than 1000 is ideal for sleeping and from 1000~5000 can cause issues on sleep(this is why air feels like heavy sometimes when you go into a closed bedroom).
We noticed that we are reaching around 1800 ppm which is not ideal for us nor the baby so we need some ventilation in the room. The air conditioner doesn't do anything as it just recirculates the same air. We are both foreigners so we aren't sure if there's some unwritten rules on how to keep the house ventilated in Japan. We are living in a ZEH house so it's quite well insulated which is part of the reason I think we get this high level of co2 concentration. We have some air vents in the walls that we can open but am not sure if they are bringing in enough air.
So I have a few questions for those who have dealt with this situation.
What do you to improve air quality? Opening the window is possible but it can get kinda loud and am not sure this strategy will be possible during mid winter or next summer.
If anyone knows, what do you when you have a newborn, do you have to open the windows repeatedly to ensure it doesn't get to a high ppm level or is there an easier method to manage this.
From google the only reasonable answer is to open the window and run the heater during summer but I'm worried this might skyrocket our energy bill :( so hopefully there's another way.
Cheers!
Edit: We also have the kitchen exhaust, the toilet exhaust and one in the shower room. Our realtor said to keep the one in the toilet and shower running 24/7 so that's what we've done.