Demand for fresh air, or makeup air, in hotel guestrooms is driven by several imperatives: the necessity for thermal comfort, improved indoor air quality, and building code compliance. Because hospitality is a service industry and hotel guests spend much of their time indoors, thermal comfort and IAQ are especially consequential.

When done correctly, introducing fresh air into hotel guestrooms results in healthier IAQ, fewer airborne pathogens, and a lower risk of sick
building syndrome.

• Scientific studies have demonstrated that building occupants who work in spaces with adequate levels of properly delivered fresh air are more productive.

• The more ventilation you provide, the lower the concentration of contaminants such as toxic chemicals, Living pathogens—found naturally
  in the environment—include molds, mildew, dust mites, spores, pollens, bacteria, microbes and viruses.