All the windows are closed and the doors are shut. We are in the midst of winter and trying to get the most out of our heating systems since to date, no one I know is giving away heating oil. For those of us with wood or coal stoves our problems can run from layers of dust to dry skin, not to mention that we are maintaining a fire in our homes! For homes with boilers, as long as the system was checked you should be in good shape. However, most of the homes I inspect have furnaces and constant air movement can cause its own set of circumstances.
If the air quality in your home is questionable, recirculating air through a furnace can perpetuate a host of issues. Molds and allergens, if present will not just go away unless you take steps to keep them at bay. While high humidity usually isn’t a problem, improperly vented clothes dryers and bathroom fans can add high levels of moisture. Maintaining humidity levels below 50% can help here. Some furnaces have humidifiers that add moisture to the air as it leaves the furnace. These are often neglected and if there is fungus in the unit or in the ductwork, what you are doing is moving those spores through the home. The same holds true for Heat Pumps which are even more neglected. The same ductwork for the air conditioning is used for heat and since there are usually no service contracts for Heat Pumps they are often left alone until they need repair.
Air filters need to be changes frequently. If allowed to accumulate dirt, not only does your furnace have to work harder but you are potentially forcing dirt, dust and lint along with spores and allergens through the building over and over. Invariably many people get sicker during the winter months. Add more people and you add more issues. You can of course, tell everyone to not visit during the holidays but most of us enjoy hosting friends and family.
High humidity not only is a prerequisite for mold growth it can also foster an environment for dust mites. The flip side is not enough humidity. Again, allergy issues in a too dry environment can cause sore throats, sniffles, dry skin and poor sleep. We have to strike a balance for better health.
Until we can once again open our windows and allow fresh air back in, we need to be aware that our homes can kill us. Change your filters, maintain humidity between 30% and 50% and vacuum often. If your air quality is poor or someone is suffering continually, get you home checked!