75F has reinvented economizer HVAC to improve the occupant experience and increase operational efficiency. Equipped with cloud computing data storage and processing power, Outside Air Optimization (OAO) is much more efficient than the standard economizer controller found in existing units, such as Rooftop Units (RTUs), Make Up Air (MUA) Systems and Dedicated Outside Air Systems (DOAS). Retrofit your economizers with 75F OAO demand controlled ventilation and save up to 50% on your utility costs and receive an install payback in as little as one year!
DCV optimizes the outside air damper position based on Indoor Air Quality needs and CO2 levels in the return air system. Outside air is then admitted to improve the IAQ and save energy, thus reducing utility costs. DCV also improves fan efficiency via interval modulation for step speed drives and Variable Frequency Drives (VFD).
OAO can also be used to add DCV and IAQ features to makeup air units (MAUs), air handling units (AHUs) and dedicated outdoor air systems (DOAS), although OAO does not control these systems directly.
Comparative Enthalpy HVAC control optimizes the outside air damper position based on outside air enthalpy compared with calculated indoor enthalpy. Cloud computing maximizes free cooling by predicting needs via live weather data and doppler radar instead of failure-prone hardware on the roof. 75F does not modulate to a fixed Mixed Air Temperature (MAT) such as 55º, but instead calculates the ideal MAT based on the real load of the indoor zones. This strategy significantly improves comfort by optimizing diffuser discharge air temperatures and reducing room temperature by zone.
Differential pressure control provides a way for the outside air volume of a HVAC system to provide make up air when a dedicated make up air system is not present, as sometimes found in restaurants with exhaust hoods. An optional differential pressure sensor is installed to measure indoor air pressure compared with outside air. The 75F OAO will then modulate the RTU outside air damper to achieve ideal pressure balance.
Increase efficiency with the ability to manage your entire system from our suite of web and mobile apps, Facilisight®. Not only can you make scheduling changes remotely, you can manage the scheduling of hundreds of buildings and monitor them on a single pane of glass wherever you are!