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How water gets into a structure, why it doesn't leave, and how these architectural flaws become HVAC headaches. This two-part article was first published in HPAC Engineering, December 2001 and… Read More
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Here we explore issues unique to Veterans Era Housing and present three cases where moisture problems were successfully addressed. Originally published in Home Energy November/December 2001, pages 33… Read More
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Multifamily public and low-income housing have particular problems when it comes to moisture and air pollutants. In this first of a two-part series, we look at one particular type of multifamily… Read More
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A multi-zone, single-gas, tracer gas decay measurement technique was used to test the ventilation systems of a single-story, slab-on-grade 1350 sq. ft. house in Las Vegas, Nevada, and a two-story,… Read More
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This article addresses the issue of undercutting bedroom doors to provide return airflow from bedrooms resulting in risks such as insufficient airflow, pressure imbalance, energy-inefficient loss of… Read More
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Info-803: What's Wrong With This Practice? Unsealed Conditioning Equipment Outside Conditioned Space
This article addresses the issue of unsealed conditioning equipment and ducts located outside the conditioned space in a vented attic, unconditioned crawlspace or basement resulting in risks such as… Read More
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This article addresses the issue of unsealed wall stud cavities used as a return air plenum located in a wall between a garage and living space resulting in risks such as indoor air quality issues… Read More
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This article addresses the issue of unsealed wall stud cavities or panned floor joists used as a return air plenum resulting in risks such as indoor air quality issues due to negatively pressurized… Read More
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This article addresses the issue of extra framing used unnecessarily around window openings resulting in extra costs of both time and materials that could potentially be avoided. Corrective measures… Read More
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This article addresses the issue of interior wall at exterior wall connection with excessive framing resulting in extra costs of both time and materials that could potentially be avoided by using… Read More
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This article addresses the issue of framing non-load bearing doors and windows using the same methods as load bearing walls resulting in extra costs of both time and materials that could potentially… Read More
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This article addresses the issue of supporting framing around windows resulting in extra costs of both time and materials that could potentially be avoided by using alternate construction techniques… Read More
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This article addresses the issue of horizontally layered site-made beam resulting in extra costs of both time and materials that could potentially be avoided by using alternate construction… Read More
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This article addresses the issue of site-made beam made by laying framing lumber down on the flat and building it up resulting in extra costs of both time and materials that could potentially be… Read More
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This article addresses the issue of interior door framed with an excessive amount of wood resulting in extra costs of both time and materials that could potentially be avoided by using alternate… Read More
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This article addresses the issue of inset flanged windows in a 2x6 wall resulting in a significant amount of extra wood around window opening resulting in extra costs of both time and materials that… Read More
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This article addresses the issue of top chord bearing truss in conventional residential construction framing in Phoenix AZ consuming considerably more wood than should have been used resulting in… Read More
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High performance homes—due to superior insulation, better performing windows and more efficient lighting and appliances, can be expected to have smaller sensible cooling loads than typical new homes… Read More
Hot-Humid
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Why a Ventilation System?All buildings require controlled mechanical ventilation, or the controlled, purposeful introduction of outdoor air to the conditioned space. Building intentionally leaky… Read More
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Why a Ventilation System?All buildings require controlled mechanical ventilation, or the controlled, purposeful introduction of outdoor air to the conditioned space. Building intentionally leaky… Read More
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On System Charging, Superheat and SubcoolingCheck charge on fixed orifice metering systems (piston or capillary tube) by measuring superheat. Superheat degrees are figured by taking the difference… Read More
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The performance of the cooling system will be evaluated and assured through a series of measurements including: air flow, pressures, temperatures, humidity levels, and power draw. To get off to the… Read More
Pagination
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