Electric Heater is the LV heat source of Ala Industrial with a single job: standing under a Vulcanizer and lifting its rubber yield to the maximum ×3 — three rubber per batch instead of one over a campfire. This is a stove that must be lit: cold, it is no heat source at all, and the Vulcanizer above simply waits. The warm-up takes 200 ticks (ten seconds) and costs 1200 EU, after which the pair starts straight at ×3. The 2400 EU internal buffer covers exactly one cold start plus one Vulcanizer batch, the LV input accepts 32 EU/tick, and the working rate of 6 EU/tick is spent on demand: with no machine above or no ingredients, the heater stays cold and costs nothing.
Together with the Vulcanizer (2 EU/tick) the Electric Heater draws 8 EU/tick, which still fits a copper cable (12 EU/tick); one heated batch brings three rubber for 1600 EU, and the first trio after a cold start costs 2800 EU. Cooling runs twice as slow as warming (about twenty seconds) and is free, and while the machine above waits for work the heater holds its temperature. The right-click screen has no slots — only an energy bar and a warm-up thermometer — and the four-step glow is readable without opening the screen. With Overclockers in the machine above, the heater pays the same multiplier: step II (24 EU/tick) is the practical ceiling, because step III asks 48 EU/tick from the 32 EU/tick LV input. Craft the Electric Heater from two redstone dust, one gold ingot, four iron ingots, one machine casing and one electronic circuit; lava or magma under the Vulcanizer give a free ×2 with no warm-up, a campfire ×1 — only the Electric Heater reaches ×3. Mine it with a pickaxe; it drops itself.