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The heart of the heat.
Heater kits from Harvia and HUUM — Wi-Fi-controlled electric or wood-fired, each paired with its controller and stones, sized to your room's real volume. Not sure which? The calculator answers in seconds; your quote confirms it. Every kit here ships complete: the unit, the stones it wants, the controls it needs, nothing sold in mysterious halves. Sizing is the one specification that outranks the rest — match the rated volume to your room with margin for glass, and either brand will serve for a decade. Undersized units strain and sour the heat; oversized ones loaf and last. When between sizes, go up.
Harvia The Wall SW80 (Heater Kit)heater kitFrom $1,337Harvia KIP80W3 + WiFi Controller (Heater Kit)heater kit · Wi-Fi controllerFrom $2,648Harvia M3 SL Wood Fired Stove + Chimney Kit (Heater Kit)heater kit · wood-firedFrom $2,595Harvia Spirit SP80E 8.0KW + WiFi Controller (Heater Kit)heater kit · Wi-Fi controllerFrom $4,128HUUM Drop 9.0KW + Controller (Heater Kit)heater kit · 2 controller optionsFrom $2,783
