Mechanical/Plumb Study Lounge

Maybe until your read this forum, you might have thought that sewage and sump pumps are the same because they both are installed in a sump/basin in the basement to transfer water. We even can’t figure out the difference by appearance, as both look alike. But in reality, both are different and have t

Section 918 of the International Plumbing Code describes the legal use of Air Admittance Valves as a means of venting a sanitary system. 918.3.2 states the following: Stack-type air admittance valves shall be prohibited from serving as the vent terminal for vent stacks or stack vents that serve

I'm trying to keep this simple, but as an engineer, have a habit of over complicating things. Please comment below if you have ideas on how to get impact of ERV on your system in Trace3D done in an easier way! We do a lot of adaptive reuse historic renovation projects where the developers only have

The Virginia Mechanical Code discusses natural ventilation options in Section 402. And has an image to accompany it (shown below). @simonxi you mentioned today another requirement for residential specifically that would allow natural ventilation as an option for when there is a specific exhaust co

The Darcy-Weisbach equation is a popular formula for estimating the head loss (or pressure drop) along a pipe or duct due to friction. The equation can be used in laminar flow conditions. Below is the equation and its parameters in Imperial (or English) units: Where: Explanation: 1. Frict

Hot gas reheat uses refrigerant leaving the compressor to reheat the air leaving the evaporator. This is done by channeling high-temperature, high-pressure air from the compressor through a hot gas reheat coil using hot gas reheat valves. Hot gas reheat is typically used in the dehumidification cycl