HVAC
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Using Existing Ducts for a New Heat Pump System
Tips for replacing a furnace with heat pumps
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HVAC for a Slab-on-Grade Home
What is the best heating and cooling system for a single-story house without a basement or crawlspace?
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Return Ducts for Forced-Air Systems
A fresh look at door undercuts, jumper ducts, and transfer grilles
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Residential Energy Efficiency: A Look Back on the Last 25 Years
Bit by bit, some mechanical equipment and systems have improved
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Better Ventilation May Reduce Viral Transmission
Can ventilation improvements reduce transmission of colds and flu in addition to Covid?
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Balanced Ventilation with HRVs and ERVs
Energy- and heat-recovery ventilators keep indoor air quality high without a big energy penalty
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Energy-Smart HVAC
How this cutting-edge, energy-lean mechanical system heats and cools a new home
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Why Is It So Hot Upstairs?
It's a common question and insulation, air-sealing, and mechanicals are all potential cultprits when a home's second floor is uncomfortably hot
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6 Ways to Improve Ducts in an Unconditioned Attic
If you can't get ducts out of an unconditioned attic, you can make the efficiency liability smaller
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Help! My Minisplits Make Tons of Noise
Vibrations from minisplit compressors are driving a homeowner crazy. What's the fix?
