HEATING / VENTILATION / AIR CONDITIONING
Understand the systems behind better buildings.
Clear, independent guides to the equipment and decisions that shape comfort, air quality and energy use.
EXPLORE EQUIPMENT
Built around the system you need.
Start with the operating principle, then compare the practical choices.
HEATING & COOLINGHeat pumps
Move heat between indoors and outdoors for heating and cooling.
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COOLINGCentral air conditioners
Cool air through an indoor coil and distribute it through ducts.
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VENTILATIONWhole-house ventilation
Plan fresh-air supply and stale-air exhaust as a complete system.
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HEATING & COOLINGDuctless mini-splits
Condition selected rooms without existing ductwork.
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HEATINGBoilers
Heat water for radiators, baseboards or radiant floors.
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COOLINGEvaporative coolers
Use evaporation to cool air in suitable dry climates.
ExploreA BETTER QUESTION
What fits the building, climate and load?
Capacity, distribution, controls, ventilation and installation quality all affect the result. Start with the system before selecting a model.
Explore the topics ↗FROM THE JOURNAL
Inside the systems.
Practical analysis of the choices behind HVAC equipment and design.
MODEL-SPECIFIC CONTEXT
Products, explained.
Understand equipment specifications and what to verify before ordering.
PRODUCT DIRECTORYHeating products
Heat pumps, furnaces, boilers and electric heating examples.
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PRODUCT DIRECTORYVentilation products
Exhaust, supply and heat-recovery equipment examples.
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PRODUCT DIRECTORYAir conditioning products
Room, ductless and central cooling equipment examples.
ExplorePublished equipment prices, where shown, are supplied by retailers and can change. Installation is separate.