diff --git a/Package.swift b/Package.swift
index 8e01c5d..1f083db 100644
--- a/Package.swift
+++ b/Package.swift
@@ -9,6 +9,7 @@ let package = Package(
     .library(name: "ApiController", targets: ["ApiController"]),
     .library(name: "AuthClient", targets: ["AuthClient"]),
     .library(name: "DatabaseClient", targets: ["DatabaseClient"]),
+    .library(name: "EnvClient", targets: ["EnvClient"]),
     .library(name: "FileClient", targets: ["FileClient"]),
     .library(name: "HTMLSnapshotTesting", targets: ["HTMLSnapshotTesting"]),
     .library(name: "PdfClient", targets: ["PdfClient"]),
@@ -79,6 +80,14 @@ let package = Package(
         .product(name: "Vapor", package: "vapor"),
       ]
     ),
+
+    .target(
+      name: "EnvClient",
+      dependencies: [
+        .product(name: "Dependencies", package: "swift-dependencies"),
+        .product(name: "DependenciesMacros", package: "swift-dependencies"),
+      ]
+    ),
     .target(
       name: "FileClient",
       dependencies: [
diff --git a/Sources/EnvClient/Interface.swift b/Sources/EnvClient/Interface.swift
new file mode 100644
index 0000000..699e090
--- /dev/null
+++ b/Sources/EnvClient/Interface.swift
@@ -0,0 +1,67 @@
+import Dependencies
+import DependenciesMacros
+import Foundation
+
+extension DependencyValues {
+
+  /// Holds values defined in the process environment that are needed.
+  ///
+  /// These are generally loaded from a `.env` file, but also have default values,
+  /// if not found.
+  public var env: @Sendable () throws -> EnvVars {
+    get { self[EnvClient.self].env }
+    set { self[EnvClient.self].env = newValue }
+  }
+}
+
+@DependencyClient
+struct EnvClient: Sendable {
+
+  public var env: @Sendable () throws -> EnvVars
+}
+
+public struct EnvVars: Codable, Equatable, Sendable {
+
+  public let pandocPath: String
+  public let pdfEngine: String
+
+  public init(
+    pandocPath: String = "/bin/pandoc",
+    pdfEngine: String = "weasyprint"
+  ) {
+    self.pandocPath = pandocPath
+    self.pdfEngine = pdfEngine
+  }
+
+  enum CodingKeys: String, CodingKey {
+    case pandocPath = "PANDOC_PATH"
+    case pdfEngine = "PDF_ENGINE"
+  }
+
+}
+
+extension EnvClient: DependencyKey {
+  static let testValue = Self()
+  static let liveValue = Self(env: {
+    // Convert default values into a dictionary.
+    let defaults =
+      (try? encoder.encode(EnvVars()))
+      .flatMap { try? decoder.decode([String: String].self, from: $0) }
+      ?? [:]
+
+    // Merge the default values with values found in process environment.
+    let assigned = defaults.merging(ProcessInfo.processInfo.environment, uniquingKeysWith: { $1 })
+
+    return (try? JSONSerialization.data(withJSONObject: assigned))
+      .flatMap { try? decoder.decode(EnvVars.self, from: $0) }
+      ?? .init()
+  })
+}
+
+private let encoder: JSONEncoder = {
+  JSONEncoder()
+}()
+
+private let decoder: JSONDecoder = {
+  JSONDecoder()
+}()
diff --git a/Sources/PdfClient/Interface.swift b/Sources/PdfClient/Interface.swift
index 3ca398e..2e95dc6 100644
--- a/Sources/PdfClient/Interface.swift
+++ b/Sources/PdfClient/Interface.swift
@@ -14,7 +14,6 @@ extension DependencyValues {
 @DependencyClient
 public struct PdfClient: Sendable {
   public var html: @Sendable (Request) async throws -> (any HTML & Sendable)
-  public var markdown: @Sendable (Request) async throws -> String
 }
 
 extension PdfClient: DependencyKey {
@@ -23,9 +22,6 @@ extension PdfClient: DependencyKey {
   public static let liveValue = Self(
     html: { request in
       request.toHTML()
-    },
-    markdown: { request in
-      request.toMarkdown()
     }
   )
 }
diff --git a/Sources/PdfClient/Request+markdown.swift b/Sources/PdfClient/Request+markdown.swift
deleted file mode 100644
index 00f9a11..0000000
--- a/Sources/PdfClient/Request+markdown.swift
+++ /dev/null
@@ -1,113 +0,0 @@
-import Foundation
-import ManualDCore
-
-extension PdfClient.Request {
-
-  func toMarkdown() -> String {
-    var retval = """
-      # Duct Calc
-
-      **Name:** \(project.name)
-      **Address:** \(project.streetAddress)
-                 \(project.city), \(project.state) \(project.zipCode)
-
-      ## Equipment
-
-      |                 | Value                           |
-      |:----------------|:--------------------------------|
-      | Static Pressure | \(equipmentInfo.staticPressure.string()) |
-      | Heating CFM     | \(equipmentInfo.heatingCFM.string())     | 
-      | Cooling CFM     | \(equipmentInfo.coolingCFM.string())     | 
-
-      ## Friction Rate
-
-      | Component Loss  | Value                           |
-      |:----------------|:--------------------------------|
-
-      """
-    for row in componentLosses {
-      retval += "\(componentLossRow(row))\n"
-    }
-
-    retval += """
-
-
-      | Results         | Value                           |
-      |:-----------------|:---------------------------------|
-      | Available Static Pressure    | \(frictionRate.availableStaticPressure.string()) |
-      | Total Equivalent Length      | \(totalEquivalentLength.string())                |
-      | Friction Rate Design Value   | \(frictionRate.value.string())                   |
-
-      ## Duct Sizes
-
-      | Register | Dsn CFM | Round Size | Velocity | Final Size | Flex Size | Height | Width |
-      |:---------|:--------|:----------------|:---------|:-----------|:----------|:-------|:------|
-
-      """
-    for row in ductSizes.rooms {
-      retval += "\(registerRow(row))\n"
-    }
-
-    retval += """
-
-      ## Trunk Sizes
-
-      ### Supply Trunks
-
-      | Name     | Associated Supplies | Dsn CFM | Velocity | Final Size | Flex Size | Height | Width |
-      |:---------|:--------------------|:--------|:---------|:-----------|:----------|:-------|:------|
-
-      """
-    for row in ductSizes.trunks.filter({ $0.type == .supply }) {
-      retval += "\(trunkRow(row))\n"
-    }
-
-    retval += """
-
-      ### Return Trunks / Run Outs
-
-      | Name     | Associated Supplies | Dsn CFM | Velocity | Final Size | Flex Size | Height | Width |
-      |:---------|:--------------------|:--------|:---------|:-----------|:----------|:-------|:------|
-
-      """
-    for row in ductSizes.trunks.filter({ $0.type == .return }) {
-      retval += "\(trunkRow(row))\n"
-    }
-
-    return retval
-  }
-
-  func registerRow(_ row: DuctSizes.RoomContainer) -> String {
-    return """
-      | \(row.roomName) | \(row.designCFM.value.string(digits: 0)) | \(row.roundSize.string()) | \(row.velocity.string()) | \(row.finalSize.string()) | \(row.flexSize.string()) | \(row.height?.string() ?? "") | \(row.width?.string() ?? "") |
-      """
-  }
-
-  func trunkRow(_ row: DuctSizes.TrunkContainer) -> String {
-    return """
-      | \(row.name ?? "") | \(associatedSupplyString(row)) | \(row.designCFM.value.string(digits: 0)) | \(row.roundSize.string()) | \(row.velocity.string()) | \(row.finalSize.string()) | \(row.flexSize.string()) | \(row.ductSize.height?.string() ?? "") | \(row.width?.string() ?? "") |
-      """
-  }
-
-  func componentLossRow(_ row: ComponentPressureLoss) -> String {
-    return """
-      | \(row.name) | \(row.value.string()) |
-      """
-  }
-
-  var totalEquivalentLength: Double {
-    maxSupplyTEL.totalEquivalentLength + maxReturnTEL.totalEquivalentLength
-  }
-
-  func associatedSupplyString(_ row: DuctSizes.TrunkContainer) -> String {
-    row.associatedSupplyString(rooms: ductSizes.rooms)
-  }
-}
-
-extension DuctSizes.TrunkContainer {
-
-  func associatedSupplyString(rooms: [DuctSizes.RoomContainer]) -> String {
-    self.registerIDS(rooms: rooms)
-      .joined(separator: ", ")
-  }
-}