Climate & air

Smart thermostats, heat pumps and mini splits, ventilation, air purifiers, humidifiers and dehumidifiers.

ThermostatsSmart and programmable

Heat pumpsDucted and mini split

Air qualityPurifiers and humidity

Mini splitsDuctless heating and cooling

VentilationERV, HRV and fans

Humidity controlHumidifiers and dehumidifiers

Climate & air

Thermostats

Buying guideSmart Thermostat Compatibility

Thermostat wiring

Check smart thermostat compatibility before you buy: what the C-wire does, heat pump and multi-stage wiring, line-voltage heaters, and how to read your wires.

Climate & air

Air quality

Buying guideAir Purifier CADR and Room Size

Air purifier sizing

Size an air purifier with CADR: the two-thirds rule, air changes per hour, true HEPA, filter costs and noise, plus why to avoid ozone-producing purifiers.