At cfm we are often asked: “How much outside air can we bring in thru a standard RTU?” The short answer is you can bring in as much as...... Read More
Here is a recent problem that we ran into when helping a customer design a makeup air unit for a paint shop. Hopefully you find this valuable. Let us...... Read More
One of the most common reasons for rooftop service calls is incorrect airflow. Low airflow will often lead to frozen evaporator coils, low pressure trips, sweating ductwork and low...... Read More
We get asked this question often. And for good reason, DOAS equipment is expensive. If a building owner needs makeup air, in most cases a DOAS will be required....... Read More
This is an easy calculation if you know the cfm (airflow to be conditioned) and have a psychrometric chart handy. The formula for calculating total cooling is: Qt = cfm x (Hf-Hi)...... Read More
When possible, it makes life easy to have a separate DOAS system from the space HVAC system. In this case, each system has one specific job: -The DOAS’s job is...... Read More
Did you know that the HVAC equipment for indoor pool applications should not be installed directly above the swimming pool area? Warm moist air, which might contain airborne chemicals like...... Read More
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