Forced Air Heating
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Grilles, Registers, and Diffusers, Part 1
An in-depth look at how this oft-overlooked HVAC component functions and affects interior conditions
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Integrating an ERV or HRV into a Forced-Air System
This economical approach to healthy indoor air quality has its challenges
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Heat Pump or Furnace: Which is Better for Comfort?
It is a matter of distribution rather than air temperature
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Getting Started with Static Pressure Measurements
Understanding how static pressure affects a forced-air HVAC system can help optimize its performance
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Testing Ducts for Air Leakage
Two ways to test ducts for airtightness in order to meet 2021 energy code requirements
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Benefits of HVAC Filter Grilles
Four reasons to design duct systems with filters at the intakes
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Planning a Furnace-to-Ducted Heat Pump Retrofit, Part 1: Needs Assessment
The advantages of using an air handler when replacing a gas furnace with heat-pump technology
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The Value and Limits of Manual J
These basic energy models can teach us more about our plans than what heating and cooling loads to expect
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Radiant Heating and Cooling in Texas
In a hot-humid climate, how would this system work in a house made with insulated concrete forms?
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An Energy Auditor’s Toolkit
Testing and commissioning houses requires a number of gadgets—many of which can be used across trades
