In HVAC, we rarely need to have a deep understanding of electrical design. But there are a few cases where a little understanding can go a long way in identifying issues before they cause trouble, and that is the intent of this short article.
The longevity and cost-saving features of today’s advanced HDPE “plastic” cooling towers tests the wisdom of choosing yesteryear’s conventional metal-clad models.
In an effort to keep up with demand, a bourgeoning east-coast microbrewery sought to significantly increase production, but, to do so, it required a more cost-efficient and effective heating process.
In this troubleshooting situation, the equipment is an air source heat pump and the customer’s complaint is that even though the thermostat is set at 70° F, the temperature in the conditioned space remains near 65°.
Many employers still recall opening a letter from the Social Security Administration (SSA) informing them that the name or Social Security number (SSN) reported on a recent wage report does not match a name or SSN in the SSA’s records.
My favorite customer is not the new customer, as strange as that may sound, but I can’t have my favorite customer without first getting a new customer. So, let’s say I have a new customer, they called for service, and our technician did a jam-up job and really impressed them. They were also impressed with our company, and even signed up for a service agreement or maintenance plan. That’s the goal, right? Attract them, book them, impress them, sign them, and keep them. But wait, there’s more.
Hotel Milano Scala has recently installed a new Mitsubishi Electric filtration system. Fresh air entering the interior spaces is treated in four air handling units — three rated at 5,000 m3/h plus one at 10,000 m3/h for a total air treatment capacity of 25,000 m3/h — composed of a class G4 pre-filter and a class F9 final filter (the same ones used in hospitals to prevent contamination).
Thermostats have gotten seriously smart in the last decade. While they’re a great improvement over traditional thermostats, smart thermostats still cannot affect air distribution across a building to adjust for hot or cold spots, leaving a lot to be desired in terms of making the home a comfortable place.
One common customer complaint about their central HVAC systems is that the a/c system is running but not providing any cool air to the controlled space. One of the most common reasons for this situation is that the a/c condenser or evaporator coil has frozen over. This term or phrase literally means that ice has formed on the heat exchanger, preventing the transfer of heat since the ice is acting as an insulator.