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What Is PM2.5?
Understanding the types and sources of air particulates is the first step toward controlling them
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Water Temperature and Legionnaires’ Disease
Under what conditions does the threat of Legionella bacteria become serious in a residential setting?
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When and When Not to DIY
If saving money is the main motivation, you might want to rethink that do-it-yourself project. Start by asking yourself these questions.
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Choosing Windows: Condensation Resistance
Learn how to use information from two performance rating systems to select windows that will stay dry in given environmental conditions
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Installing a Zehnder ERV
A small team of HVAC experts installs an ERV and air distribution system in the span of two days
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Why Basements Smell and How to Fix It
Moisture coming into basements through concrete foundation walls can lead to unhealthy conditions. Here are solutions for keeping new and existing basements dry.
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How to Get the Right Size Air Conditioner
To avoid oversized equipment, first understand key concepts like cooling load vs. capacity, latent vs. sensible heat, and design load vs. part load
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‘Cold Blow’ from Heat Pump Supply Air
The air that heat pumps blow is colder than furnace air but it can still heat a house, and there are ways to ensure occupant comfort
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Energy Upgrades in an Old House
Sealing the source of a major air leak, correctly insulating kneewalls, and insulating water pipes go a long way toward improving comfort and energy efficiency in a hot-humid climate
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How Do Heat Pumps Get Heat From Cold Air? Part 2
Reframing a common question to better understand why heat pumps really do work in extremely cold climates