Improperly installed heaters or clogged chimneys can increase the amount of air pollutants produced (inside the home) and increase the likelihood of health effects
Zotethetsera zimene sizinaikidwe bwino kapena chimuuni chotsokedwa zikhoza kuwonjezera mlingo wa zowononga mpweya zimene zikupangidwa mkati mwa nyumba komanso kuwonjezera zotsatira za moyo