diff --git a/src/com/massivecraft/massivecore/HeatData.java b/src/com/massivecraft/massivecore/HeatData.java
new file mode 100644
index 00000000..1d41bbaa
--- /dev/null
+++ b/src/com/massivecraft/massivecore/HeatData.java
@@ -0,0 +1,85 @@
+package com.massivecraft.massivecore;
+
+public final class HeatData
+{
+	// -------------------------------------------- //
+	// CONSTANTS
+	// -------------------------------------------- //
+
+	public static final transient double HEAT_MIN = 0D;
+	public static final transient double HEAT_HIGH = 1D;
+	public static final transient long MILLIS_CALC_EPSILON = 50;
+
+	// -------------------------------------------- //
+	// FIELDS: RAW
+	// -------------------------------------------- //
+
+	private final double heat;
+	public double getHeat() { return this.heat; }
+
+	private final long lastCalcMillis;
+	public long getLastCalcMillis() { return this.lastCalcMillis; }
+
+	// -------------------------------------------- //
+	// FIELDS: INSPECT
+	// -------------------------------------------- //
+
+	public double getOverheat()
+	{
+		return this.getHeat() - HEAT_HIGH;
+	}
+
+	public boolean isOverheated()
+	{
+		return this.getOverheat() > 0;
+	}
+
+	// -------------------------------------------- //
+	// FIELDS: WITH
+	// -------------------------------------------- //
+
+	public HeatData withHeat(double heat) { return new HeatData(heat, lastCalcMillis); }
+	public HeatData withLastCalcMillis(long lastCalcMillis) { return new HeatData(heat, lastCalcMillis); }
+
+	// -------------------------------------------- //
+	// CONSTRUCT
+	// -------------------------------------------- //
+
+	private HeatData(double heat, long lastCalcMillis)
+	{
+		this.heat = Math.max(0, heat);
+		this.lastCalcMillis = lastCalcMillis;
+	}
+
+	private HeatData()
+	{
+		this.heat = 0;
+		this.lastCalcMillis = 0;
+	}
+
+	// -------------------------------------------- //
+	// FACTORY: VALUE OF
+	// -------------------------------------------- //
+
+	public static HeatData valueOf(double heat, long lastCalcMillis)
+	{
+		return new HeatData(heat, lastCalcMillis);
+	}
+
+	// -------------------------------------------- //
+	// FACTORY: RECALCULATED
+	// -------------------------------------------- //
+
+	public HeatData recalculated(long now, double heatPerMilli)
+	{
+		if (this.lastCalcMillis + MILLIS_CALC_EPSILON >= now) return this;
+
+		long deltaMillis = now - this.lastCalcMillis;
+		double heatDelta = heatPerMilli * deltaMillis;
+		double heatTarget = this.heat + heatDelta;
+		heatTarget = Math.max(0, heatTarget);
+
+		return valueOf(heatTarget, now);
+	}
+
+}
diff --git a/src/com/massivecraft/massivecore/Heatable.java b/src/com/massivecraft/massivecore/Heatable.java
new file mode 100644
index 00000000..8747b9f3
--- /dev/null
+++ b/src/com/massivecraft/massivecore/Heatable.java
@@ -0,0 +1,107 @@
+package com.massivecraft.massivecore;
+
+public abstract class Heatable
+{
+	// -------------------------------------------- //
+	// ABSTRACT
+	// -------------------------------------------- //
+
+	public abstract HeatData getData();
+	public abstract void setData(HeatData data);
+
+	public abstract double getHeatPerMilli();
+	public abstract double getHeatPerExecution();
+
+	// -------------------------------------------- //
+	// CUSTOM
+	// -------------------------------------------- //
+
+	private HeatData getRecalculatedData(double heatPerMilli)
+	{
+		long now = System.currentTimeMillis();
+		HeatData data = this.getData().recalculated(now, heatPerMilli);
+		this.setData(data);
+		return data;
+	}
+
+	public void addHeat(double heatPerMilli, double heat)
+	{
+		long now = System.currentTimeMillis();
+		HeatData data = this.getData().recalculated(now, heatPerMilli);
+		data = data.withHeat(data.getHeat() + heat);
+		this.setData(data);
+	}
+
+	public double getHeat(double heatPerMilli)
+	{
+		HeatData data = getRecalculatedData(heatPerMilli);
+		return data.getHeat();
+	}
+
+	public boolean isOverheated(double heatPerMilli)
+	{
+		HeatData data = getRecalculatedData(heatPerMilli);
+		return data.isOverheated();
+	}
+
+	public double getOverheat(double heatPerMilli)
+	{
+		HeatData data = getRecalculatedData(heatPerMilli);
+		return data.getOverheat();
+	}
+
+	public long getCooldownMillisLeft(double heatPerMilli)
+	{
+		double overheat = this.getOverheat(heatPerMilli);
+		return (long) (-overheat / heatPerMilli);
+	}
+
+	// -------------------------------------------- //
+	// DEFAULT
+	// -------------------------------------------- //
+
+	public void addHeat(double heat)
+	{
+		this.addHeat(this.getHeatPerMilli(), heat);
+	}
+
+	public void addHeat()
+	{
+		this.addHeat(this.getHeatPerExecution());
+	}
+
+	public double getHeat()
+	{
+		return this.getHeat(this.getHeatPerMilli());
+	}
+
+	public boolean isOverheated()
+	{
+		return this.isOverheated(this.getHeatPerMilli());
+	}
+
+	public double getOverheat()
+	{
+		return this.getOverheat(this.getHeatPerMilli());
+	}
+
+	public long getCooldownMillisLeft()
+	{
+		return this.getCooldownMillisLeft(this.getHeatPerMilli());
+	}
+
+	// -------------------------------------------- //
+	// UTIL
+	// -------------------------------------------- //
+
+	public static double calcHeatPerExecution(long executionCount, long periodMillis)
+	{
+		return 1D / (double)executionCount;
+	}
+
+	public static double calcHeatPerMilli(long executionCount, long periodMillis)
+	{
+		return - 1D / (double)periodMillis;
+	}
+
+}