Manual J- Page 2 of 3
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Who Can Perform My Load Calculations?
Most HVAC contractors don’t know how to do heating load and cooling load calculations — so what’s a homeowner to do?
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Does a Bigger Volume Mean More Heating and Cooling Load?
Many people answer this question incorrectly
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What’s Wrong With Our New Furnace?
Why isn’t this furnace, which was sized by a heating contractor, keeping anyone comfortable?
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Sizing a Modulating Condensing Boiler
You can use simple math to avoid common boiler sizing errors
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Replacing a Furnace or Boiler
A 15-minute way to calculate design heating load when sizing replacement equipment
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Three Types of Heating and Cooling Loads
Manual J gives you one of them, but what do you do about the others?
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How to Tell If Your Air Conditioner Is Oversized
All you need is a timer and a thermometer — but data loggers make it easier
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Heat Losses Are Way More than Planned
An owner/builder in Ontario feels deflated after heat-loss calculations come in much worse than he expected — but numbers are not always what they seem
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Can’t Anyone Get Things Right?
Recent experiences with contractors and tradespeople leave me frustrated
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When Do I Need to Perform a Load Calculation?
Part 4 in a series of articles on sizing heating and cooling equipment