Posts by Roger Thue

Question: Do you know that glycol provides both a freeze point and a burst point? Do you know the difference between them? Do you know which one your system should be protected to? If you answered no to any of those questions, you might want to read on. We recently recommissioned a project where the…

Question: We have all seen the job sites where there’s everything you can think of crammed into the ceiling plenum above a lay-in ceiling. In those cases you can hardly lift a tile out, not to mention access or work on anything. Obviously this is not ideal. Everyone would love to have another few inches,…

Question: When you need to start your cooling fan, what’s the most efficient way to do so? Answer: We recently ran into a case where a single cooling tower served modular water-cooled chillers in a typical classroom and office building. The first stage of the control loop sent water over the tower with the fan…

Question: Is your closed loop hydronic system expansion tank tied to the correct point in your system? In many more cases than you might think, we find it is not. Expansion tanks tied to the incorrect point in the system don’t perform as they should. Solution: Like many answers you hear in the field of…

Question: Are you having frequent problems with large fluctuations in closed loop hydronic system pressure? Does your system frequently pop safety relief valves one day and then need to have fluid added they next day? Is your pump cavitating at times? If your pump sound like it is pumping marbles, it could be cavitation. Solution:…