feat: Initial commit

Sources/SharedModels/BudgetedPercentEnvelope.swift

@@ -0,0 +1,54 @@
+import Foundation
+
+public struct BudgetedPercentEnvelope: Equatable {
+  
+  public var coilBudget: Percentage
+  public var filterBudget: Percentage
+  public var returnPlenumBudget: Percentage
+  public var supplyPlenumBudget: Percentage
+  
+  public var preCoilBudget: Percentage {
+    coilBudget + supplyPlenumBudget
+  }
+  
+  public init(
+    coilBudget: Percentage,
+    filterBudget: Percentage,
+    returnPlenumBudget: Percentage,
+    supplyPlenumBudget: Percentage
+  ) {
+    self.coilBudget = coilBudget
+    self.filterBudget = filterBudget
+    self.returnPlenumBudget = returnPlenumBudget
+    self.supplyPlenumBudget = supplyPlenumBudget
+  }
+  
+  public init(equipmentType: EquipmentType, fanType: FanType) {
+    switch equipmentType {
+    case .furnaceAndCoil:
+      switch fanType {
+      case .constantSpeed:
+        self.init(
+          coilBudget: 40%,
+          filterBudget: 20%,
+          returnPlenumBudget: 20%,
+          supplyPlenumBudget: 20%
+        )
+      case .variableSpeed:
+        self.init(
+          coilBudget: 30%,
+          filterBudget: 40%,
+          returnPlenumBudget: 15%,
+          supplyPlenumBudget: 15%
+        )
+      }
+    case .airHandler:
+      self.init(
+        coilBudget: .zero,
+        filterBudget: 50%,
+        returnPlenumBudget: 25%,
+        supplyPlenumBudget: 25%
+      )
+    }
+  }
+}