Toxins in our homes come in many forms. These unwanted substances are invisible and can be deadly. Our home’s HVAC heating and cooling systems behave similarly to our lungs, in that air filters within the HVAC system also trap harmful pollutants (such as pet dander, dust, and other hazardous particulates). Each air filter has a MERV rating. You should choose the ideal rating for your home’s units to maximize (and not drain) its running performance. Making adjustments to improve the indoor air quality where we live is just as vital to our health as a healthy diet and regular exercising.