ASHRAE published “Addendum ae” in August for Standard 62.1 (Ventilation for Acceptable Indoor Air Quality). 

The new Standard intends to reduce relative humidity (RH) and moisture related problems in buildings by setting a dew point maximum and mandating control both during occupied and unoccupied times.


Many existing mechanical systems do not comply with the new requirements;
leaving occupants exposed to potentially harmful Indoor Air Quality.

The Addendum also reinforces the importance of building pressurization: 
Ventilation systems for a building equipped with or served by mechanical cooling equipment shall be designed such that the total building outdoor air intake equals or exceeds the total building exhaust under all load and dynamic reset conditions.

HEDS is uniquely designed to meet the new requirements!

HEDS is the simplest RH control technology available.

Don’t settle. Contact us to learn how HEDS will meet the new standard, and provide the lowest total cost of ownership.

Scot Duncan

Jeff Kuhl