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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

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

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

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

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

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

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

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

Ventilation system intakes must be sufficiently separated away from potential contaminant sources, and locations of dust and debris. Mechanical sealed combustion equipment intake should also be… Read More

The Manual J (i.e. heating and cooling load) calculations typically yield the airflow requirements to the various rooms to meet those design loads. These airflow volumes are then used to size and lay… Read More