Equipment

Gas Furnace

How a modern forced air gas furnace proves each condition before it allows the next step.

Equipment

Air Conditioner

A split system cooling appliance: what each half does and how the two halves have to match.

Equipment

Heat Pump

The same refrigeration cycle, reversed on demand, so one machine can heat and cool.

Equipment

Boiler

How a hydronic boiler heats water and distributes heat, and the difference between conventional and condensing designs.

Equipment

Water Heater

Storage, tankless and heat pump water heaters, and the safety devices every installation depends on.

Equipment

HRV and ERV

Balanced ventilation with heat or energy recovery, and how the two differ.

Equipment