diff --git a/js/beestat/temperature.js b/js/beestat/temperature.js
index 588a255..0f9aa90 100644
--- a/js/beestat/temperature.js
+++ b/js/beestat/temperature.js
@@ -5,6 +5,8 @@
  *
  * @param {object} args Instructions on how to format:
  *   temperature (required) - Temperature to work with
+ *   input_temperature_unit (optional, default °F) - Input temperature unit
+ *   output_temperature_unit (optional, default °F|°C) - Input temperature unit; default matches setting.
  *   convert (optional, default true) - Whether or not to convert to Celcius if necessary
  *   delta (optional, default false) - Whether or not the convert action is for a delta instead of a normal value
  *   round (optional, default 1) - Number of decimal points to round to
@@ -21,7 +23,14 @@ beestat.temperature = function(args) {
     };
   }
 
-  var convert = beestat.default_value(args.convert, true);
+  var input_temperature_unit = beestat.default_value(
+    args.input_temperature_unit,
+    '°F'
+  );
+  var output_temperature_unit = beestat.default_value(
+    args.output_temperature_unit,
+    beestat.setting('temperature_unit')
+  );
   var delta = beestat.default_value(args.delta, false);
   var round = beestat.default_value(args.round, 1);
   var units = beestat.default_value(args.units, false);
@@ -35,11 +44,19 @@ beestat.temperature = function(args) {
   }
 
   // Convert to Celcius if necessary and asked for.
-  if (convert === true && beestat.setting('temperature_unit') === '°C') {
-    if (delta === true) {
-      temperature *= (5 / 9);
-    } else {
-      temperature = (temperature - 32) * (5 / 9);
+  if (input_temperature_unit !== output_temperature_unit) {
+    if (input_temperature_unit === '°F') {
+      if (delta === true) {
+        temperature *= (5 / 9);
+      } else {
+        temperature = (temperature - 32) * (5 / 9);
+      }
+    } else if (input_temperature_unit === '°C') {
+      if (delta === true) {
+        temperature *= (9 / 5);
+      } else {
+        temperature = (temperature * (9 / 5)) + 32;
+      }
     }
   }
 
@@ -62,7 +79,7 @@ beestat.temperature = function(args) {
 
   // Append units if asked for.
   if (units === true) {
-    temperature += beestat.setting('temperature_unit');
+    temperature += output_temperature_unit;
   }
 
   return temperature;
diff --git a/js/component/card/three_d.js b/js/component/card/three_d.js
index ba199d8..46c09fb 100644
--- a/js/component/card/three_d.js
+++ b/js/component/card/three_d.js
@@ -103,7 +103,6 @@ beestat.component.card.three_d.prototype.decorate_contents_ = function(parent) {
   parent.appendChild(controls_container);
   this.decorate_controls_(controls_container);
 
-
   // var thermostat = beestat.cache.thermostat[this.thermostat_id_];
 
   let required_begin;
diff --git a/js/component/card/visualize_settings.js b/js/component/card/visualize_settings.js
index e840438..00490a5 100644
--- a/js/component/card/visualize_settings.js
+++ b/js/component/card/visualize_settings.js
@@ -150,21 +150,65 @@ beestat.component.card.visualize_settings.prototype.decorate_heat_map_type_ = fu
     parent.appendChild(min_max_container);
 
     const min = new beestat.component.input.text()
-      .set_value(beestat.setting(
-        'visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.min')
+      .set_maxlength('5')
+      .set_requirements({
+        'type': 'decimal',
+        'required': true
+      })
+      .set_value(
+        beestat.temperature(beestat.setting(
+          'visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.min'
+        ))
       )
       .set_width(50);
     min.addEventListener('change', function() {
-      beestat.setting('visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.min', min.get_value());
+      if (min.meets_requirements() === true) {
+        beestat.setting(
+          'visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.min',
+          beestat.temperature({
+            'temperature': min.get_value(),
+            'input_temperature_unit': beestat.setting('temperature_unit'),
+            'output_temperature_unit': '°F'
+          })
+        );
+      } else {
+        min.set_value(
+          beestat.temperature(beestat.setting(
+            'visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.min'
+          ))
+        );
+      }
     });
 
     const max = new beestat.component.input.text()
-      .set_value(beestat.setting(
-        'visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.max')
+      .set_maxlength('5')
+      .set_requirements({
+        'type': 'decimal',
+        'required': true
+      })
+      .set_value(
+        beestat.temperature(beestat.setting(
+          'visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.max'
+        ))
       )
       .set_width(50);
     max.addEventListener('change', function() {
-      beestat.setting('visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.max', max.get_value());
+      if (max.meets_requirements() === true) {
+        beestat.setting(
+          'visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.max',
+          beestat.temperature({
+            'temperature': max.get_value(),
+            'input_temperature_unit': beestat.setting('temperature_unit'),
+            'output_temperature_unit': '°F'
+          })
+        );
+      } else {
+        max.set_value(
+          beestat.temperature(beestat.setting(
+            'visualize.heat_map_absolute.' + beestat.setting('visualize.data_type') + '.max'
+          ))
+        );
+      }
     });
 
     let span;
diff --git a/js/component/chart/runtime_sensor_detail_temperature.js b/js/component/chart/runtime_sensor_detail_temperature.js
index 7eaedf5..2a0a1d4 100644
--- a/js/component/chart/runtime_sensor_detail_temperature.js
+++ b/js/component/chart/runtime_sensor_detail_temperature.js
@@ -230,7 +230,7 @@ beestat.component.chart.runtime_sensor_detail_temperature.prototype.get_options_
         } else {
           value = beestat.temperature({
             'temperature': point.value,
-            'convert': false,
+            'input_temperature_unit': beestat.setting('temperature_unit'),
             'units': true
           });
           point_value = point.value;
diff --git a/js/component/chart/runtime_thermostat_detail_temperature.js b/js/component/chart/runtime_thermostat_detail_temperature.js
index 19cef54..b66602b 100644
--- a/js/component/chart/runtime_thermostat_detail_temperature.js
+++ b/js/component/chart/runtime_thermostat_detail_temperature.js
@@ -288,7 +288,7 @@ beestat.component.chart.runtime_thermostat_detail_temperature.prototype.get_opti
 
         value = beestat.temperature({
           'temperature': value,
-          'convert': false,
+          'input_temperature_unit': beestat.setting('temperature_unit'),
           'units': true
         });
       } else if (point.series_code.includes('humidity') === true) {
diff --git a/js/component/chart/runtime_thermostat_summary.js b/js/component/chart/runtime_thermostat_summary.js
index decbde5..c3d7ec5 100755
--- a/js/component/chart/runtime_thermostat_summary.js
+++ b/js/component/chart/runtime_thermostat_summary.js
@@ -234,14 +234,14 @@ beestat.component.chart.runtime_thermostat_summary.prototype.get_options_tooltip
         ) {
           value = beestat.temperature({
             'temperature': values.min_outdoor_temperature,
-            'convert': false,
+            'input_temperature_unit': beestat.setting('temperature_unit'),
             'units': true,
             'round': 0
           });
           value += ' to ';
           value += beestat.temperature({
             'temperature': values.max_outdoor_temperature,
-            'convert': false,
+            'input_temperature_unit': beestat.setting('temperature_unit'),
             'units': true,
             'round': 0
           });
@@ -252,7 +252,7 @@ beestat.component.chart.runtime_thermostat_summary.prototype.get_options_tooltip
         color = point.series.color;
         value = beestat.temperature({
           'temperature': values.avg_outdoor_temperature,
-          'convert': false,
+          'input_temperature_unit': beestat.setting('temperature_unit'),
           'units': true,
           'round': 0
         });
diff --git a/js/component/chart/temperature_profiles.js b/js/component/chart/temperature_profiles.js
index 6b6963d..d71d806 100644
--- a/js/component/chart/temperature_profiles.js
+++ b/js/component/chart/temperature_profiles.js
@@ -296,7 +296,7 @@ beestat.component.chart.temperature_profiles.prototype.get_options_tooltip_forma
       var value = beestat.temperature({
         'temperature': point.y,
         'units': true,
-        'convert': false,
+        'input_temperature_unit': beestat.setting('temperature_unit'),
         'delta': true,
         'type': 'string'
       }) + ' / h';
@@ -321,7 +321,7 @@ beestat.component.chart.temperature_profiles.prototype.get_options_tooltip_forma
         'temperature': this.x,
         'round': 0,
         'units': true,
-        'convert': false
+        'input_temperature_unit': beestat.setting('temperature_unit')
       }),
       sections
     );
@@ -380,7 +380,7 @@ beestat.component.chart.temperature_profiles.prototype.get_options_xAxis_ = func
           'useHTML': true,
           'text': 'Now: ' + beestat.temperature({
             'temperature': this.data_.metadata.chart.outdoor_temperature,
-            'convert': false,
+            'input_temperature_unit': beestat.setting('temperature_unit'),
             'units': true,
             'round': 0
           })
diff --git a/js/component/input.js b/js/component/input.js
index 119e6a2..3329802 100644
--- a/js/component/input.js
+++ b/js/component/input.js
@@ -79,6 +79,9 @@ beestat.component.input.prototype.meets_requirements = function() {
     case 'integer':
       this.requirements_.regexp = /^-?\d+$/;
       break;
+    case 'decimal':
+      this.requirements_.regexp = /^-?\d+(?:\.\d+)?$/;
+      break;
     }
 
     if (