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
Author: Brad Telker
Brad was born and raised in St Louis Missouri, where he spent the first 18 years of his life. At the ripe young age of 18, he embarked onto his next big adventure, traveling to the University of Missouri Columbia for a bachelor’s degree in Mechanical Engineering. Brad joined the cfm team in 2006, and now as the Vice President of Commercial Sales, he focuses on business development, as well as helping contractors and engineers find creative and unique solutions to any size project. When he’s not at work, Brad enjoys photography, running and spending time with his family.
DYK York doesn’t require suction traps for R410a?
When an HVAC system uses POE (Polyolester) oil, which is typical of current R410a systems, suction oil traps are not required* because POE is miscible in R410a in all phases...... Read More
Fan Types- Centrifugal, Axial, Forward Curve, Airfoil. What does it all mean?
The cfm Distributors Inc Applied Systems Group meets every other Monday at 8am for training. This training covers a plethora of topics, but a portion of this training is...... Read More
How to use Fan Laws for design/build retrofits
If you’ve ever had a situation where your HVAC unit had less airflow than expected, you’ve officially had a run-in with the FAN LAWS. The biggest takeaway from this...... Read More
HVAC swimming pool design
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
How do you select and design a custom coil replacement?
Here is a step-by-step process for replacing a custom coil and A) Making sure it fits and B) Making sure it works.Step #1: Gather the physical coil dimensions (more info...... Read More
Can you mix R-410a and R-22 equipment?
“Can you install an R-410a condensing unit matched with an R-22 evaporator coil?”We get asked this question often, so we thought it would be helpful to write a post about...... Read More
How do you fix a humidity problem?
Humidity, the 8th wonder of the world, is a tough nut to crack. Unlike sensible heat transfer, it’s very difficult to measure its movement into buildings through cracks, doorways, and other openings.But,...... Read More
How many tons of air conditioning is this DX or Chilled Water coil?
If you are measuring a Direct Expansion (DX) or Chilled Water coil in the field, or just quoting a replacement coil, you can quickly estimate its nominal tonnage based...... Read More
How much system water per ton of cooling for process chillers?
Did you know that York recommends a MINIMUM of 6 gallons of system water per ton of cooling for process chillers? This is double the amount of water that...... Read More
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