diff --git a/code/modules/reagents/chemistry/machinery/chem_heater.dm b/code/modules/reagents/chemistry/machinery/chem_heater.dm
index 25c026acfac..15683b4d6f2 100644
--- a/code/modules/reagents/chemistry/machinery/chem_heater.dm
+++ b/code/modules/reagents/chemistry/machinery/chem_heater.dm
@@ -13,7 +13,7 @@
 	/// Whether this should auto-eject the beaker once done heating/cooling.
 	var/auto_eject = FALSE
 	/// The higher this number, the faster reagents will heat/cool.
-	var/speed_increase = 0
+	var/speed_increase = 40
 
 /obj/machinery/chem_heater/Initialize(mapload)
 	. = ..()
@@ -26,7 +26,7 @@
 /obj/machinery/chem_heater/RefreshParts()
 	speed_increase = initial(speed_increase)
 	for(var/obj/item/stock_parts/micro_laser/M in component_parts)
-		speed_increase += 5 * (M.rating - 1)
+		speed_increase += 20 * (M.rating - 1)
 
 /obj/machinery/chem_heater/process()
 	..()
@@ -37,7 +37,8 @@
 			if(!beaker.reagents.total_volume)
 				on = FALSE
 				return
-			beaker.reagents.temperature_reagents(desired_temp, max(1, 35 - speed_increase))
+			var/sign = SIGN(desired_temp - beaker.reagents.chem_temp)
+			beaker.reagents.adjust_reagent_temp(speed_increase * sign, desired_temp)
 			if(round(beaker.reagents.chem_temp) == round(desired_temp))
 				playsound(loc, 'sound/machines/ding.ogg', 50, 1)
 				on = FALSE
diff --git a/code/modules/reagents/chemistry/reagents_holder.dm b/code/modules/reagents/chemistry/reagents_holder.dm
index 07f8d48f7bb..53d12d76eef 100644
--- a/code/modules/reagents/chemistry/reagents_holder.dm
+++ b/code/modules/reagents/chemistry/reagents_holder.dm
@@ -248,6 +248,17 @@
 
 	handle_reactions()
 
+/datum/reagents/proc/adjust_reagent_temp(amount, temperature_bound)
+	if(chem_temp == temperature_bound || !amount) // We don't need to do the mathy math
+		return
+	if(!isnull(temperature_bound)) // If we have a target temp, we only go until that temperature
+		chem_temp = directional_bounded_sum(chem_temp, amount, temperature_bound, temperature_bound)
+	else
+		chem_temp += amount
+	chem_temp = clamp(chem_temp, temperature_min, temperature_max)
+	temperature_react()
+	handle_reactions()
+
 /**
  * Same as [/datum/reagents/proc/trans_to] but only for a specific reagent in
  * the reagent list. If the specified amount is greater than what is available,