Indoor Environment Verification for Short-Term Rentals

Indoor Environment Verified™ (IEV) is a professional hospitality trustmark for short-term rental and vacation rental properties. A certified IEV operator visits the property and measures the indoor conditions guests actually feel — carbon dioxide (CO2), airborne particulates (PM2.5), temperature, and relative humidity — following the same protocol on every visit. Those readings are scored independently by IEV, never by the person in the room, and a property that meets the standard earns the Indoor Environment Verified™ mark: one mark, displayed on every verified property, renewed on site every year. IEV is not a mold test and not a home inspection. It is independent, standardized confirmation that a rental is fresh, comfortable, and well cared for — assurance that helps a listing stand out and gives guests confidence before they book.