If you are also trying to improve filtration at the system level, this guide on the best HVAC filters for allergies and whole-home air cleaning explains how furnace and air handler filters fit into the bigger picture
Because a mini split heat pump swaps between cooling and heating, the smell can appear in both spring and fall
Environmental tobacco smoke, genetic susceptibility, and risk of lung cancer in never-smoking women
In the case of marijuana, scientists have described acute problems with memory, coordination, and judgment, and chronic issues such as respiratory problems, cardiovascular disease, and cognitive impairment
The above factors are the predominant concerns of the US FDA, and the rationale for wanting to ban at least one form of tobacco in order to reduce the prevalence of smokers (it is worth noting that menthol cigarettes account for more than one-third of all cigarettes sold in the United States)