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Two-Stage Evaporative Coolers

by John Krigger | Jun 27, 2024 | AC Air Conditioning / Cooling, Energy Efficient Buildings, Uncategorized

A two-stage evaporative cooler is a newer, more efficient evaporative cooler that uses a pre-cooler, improved evaporative pads, and a more efficient motor. The pre-cooler cools the incoming air, with a water-cooled heat exchanger, and without adding any moisture to...

Cooling with Wind-and-Solar-Powered Ventilation

by John Krigger | Jun 21, 2024 | AC Air Conditioning / Cooling, Energy Efficient Buildings, Uncategorized

Let’s think about the possibility of electrical-grid failure, unaffordable electricity, or AC failure during very hot weather. Ancient ideas and their modern designs may be one solution. Modern wind-catchers, along with wind-powered and solar-powered ventilators...

How Air Conditioners Dehumidify

by John Krigger | Jun 20, 2024 | AC Air Conditioning / Cooling, Air Sealing Buildings, Duct Air Sealing, Uncategorized

The sensible-heat ratio (SHR) expresses the moisture-removal capacity of the AC system. The SHR rates the air conditioner on its ability to remove moisture and is an important consideration to select a central AC system.  The SHR is a decimal number between 0.5 and...

Roof Coatings for Retrofit Cool Roofs

by John Krigger | Jun 12, 2024 | AC Air Conditioning / Cooling, Uncategorized

You can apply several types of white roof coatings to various roofing materials to create a cool roof. When choosing a white roof coating, consider your existing roofing material, the roof’s slope, and the manufacturer’s specifications for the coating....

Badgirs: Low-Cost Cooling from Long Ago

by John Krigger | Jun 6, 2024 | AC Air Conditioning / Cooling, Uncategorized

Badgirs — also known as windcatchers or wind towers — are traditional non-electric architectural features used in the Middle East for natural ventilation and cooling.  Architects and builders used Babgirs for centuries to create indoor comfort in hot, arid climates....

Why Air Conditioners Fail to Dehumidify

by John Krigger | Jun 6, 2024 | AC Air Conditioning / Cooling, Uncategorized

Your AC can provide either optimal efficiency or optimal dehumidification, but it can’t usually provide both. Air conditioners, designed for energy-efficiency, may not run cold enough to condense sufficient water vapor out of the indoor air. The air conditioner may...
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