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In this final installment of our 6-article deep dive into HVAC Design for High Performance Homes where we put it all together in this Case Study and illustrate all the concepts we’ve discussed in the previous 5 articles, which are: Manual J, Manual S, Manual D/T, and fresh air ventilation.The new home in this case [...]
In the third installment of our HVAC design series, we delve into the intricacies of sizing and selecting HVAC equipment - a sophisticated HVAC design stage this is often misunderstood. Understanding a “Ton” in HVAC A pivotal concept in HVAC sizing is the term “ton,” as in a “3-ton unit.” This term, originating in the [...]
Throughout the design and construction phases of a project not often enough or at all does the question arise, “where should the window be placed in the depth of the rough opening”? Joseph Lstiburek has often noted windows are a “pain”, well that may be true, the project team still needs to determine if [...]
The simple explanation that describes the function of an exterior wall assembly is that it separates the exterior environment from the interior environment. To perform this “simple function” the assembly must control heat flow, control air flow, control water vapor flow, control rain penetration, control light, solar and other radiation, control noise, control fire, [...]
This post is the first of a series of articles that will guide you through the intricacies of HVAC (Heating, Ventilation, and Air Conditioning) design, with a focus on high-performance homes and buildings.This first post in the series is a high-level overview of the stages of HVAC design and their impact on homes built with [...]
In a previous Logix Brands blog post “Transition Details at Grade” were reviewed and one finding was that failures often don’t occur in the field of a wall, roof or the foundation, but rather at the transition from one control layer or material to another control layer or material (i.e. air control layer from [...]
Buildings need a lot of things to be successful. As Joseph Lstiburek, Ph.D. from Building Science Corporation would say, “What we call things tell us a great deal about how much we understand things. If we don’t call things by their right names, we don’t really understand how things work. If we don’t understand [...]
Adding exterior continuous insulation such as, Halo® Exterra®, to an above grade wall assembly helps to keep the air behind the foam board insulation at a higher temperature. The benefit of air at a higher temperature means it can hold more moisture. This attribute is clearly illustrated when reviewing various air temperatures and the [...]