Dais (formerly known as Dais Analytic) is a provider of nanotechnology-based applications for heating and cooling, water treatment, and energy storage. Its core products include ConsERV, a fixed plate energy recovery ventilator which can be useful in meeting building indoor fresh air requirements while saving energy and lowering emissions for most forms of heating, ventilation, and air conditioning (HVAC) equipment; and NanoClear, a water clean-up process useful in the creation of potable water from most forms of contaminated water including industrial process wastewater (petrochemical, steel, etc.) sea, brackish, or wastewater.