Avoid all scented soaps, shampoos, cologne, candles and sprays from the interior
Showers and showerheads can harbor loads of germs and bacteria so clean often or replace
Fireplaces give off irritating gases and sooty particulate matter so stay clear of all smoke
Avoid newly dry-cleaned garments and take them out of the plastic to let them air out
Seek out dry cleaners that use “green” environmentally sensitive cleaning agents
Pet are great but their dander has been shown to be a significant irritant
Cleaning products that contain bleach or ammonia are major irritants to breathing
Carpeting and area rugs can be a major source of dirt and dust so have them cleaned regularly
Regularly replace HVAC filters as forced air conditioning systems blow dust around 24/7
In the HVAC system, inspect the coils, duct and vents and keep them free of dust and bacteria
Consider a HVAC ultra-violet light (use a UV-C type only) in the system to kill air-born bacteria
Install HVAC high-merv filters of at least 9-12 but be sure the system is designed for the higher static pressure of better filtration
Install a dehumidifier to rid the environment of air-borne bacteria that comes with humdity
Use only paint and finishes that are free of VOCs – volatile organic compounds
Remove shoes when entering a home as they carry dirt and soil into the residence
Avoid brooms that “whisk” up the dirt into the air & consider using HEPA-style vacuum cleaners
Clean bathroom vent fans and the ventilation systems in the kitchen like above the cook-top
Certain kinds of plants are excellent being gas-absorbing and sucking up microbial particulates
Avoid whole-house interior fumigation for bug control. Consider natural repellants