diff --git a/manifests/dashboards/heat.pp b/manifests/dashboards/heat.pp
index 5de7b8b4..bfd5456a 100644
--- a/manifests/dashboards/heat.pp
+++ b/manifests/dashboards/heat.pp
@@ -25,9 +25,19 @@
 #    (optional) Local copy of service policy files.
 #    Defaults to 'heat_policy.yaml'
 #
+#  [*template_generator_api_timeout*]
+#    (optional) API timeout to retrieve response from template generator.
+#    Defaults to 60
+#
+#  [*template_generator_api_parallel*]
+#    (optional) Concurrency to retrieve response from template generator.
+#    Defualts to 2
+#
 class horizon::dashboards::heat(
-  $enable_user_pass = true,
-  $policy_file      = 'heat_policy.yaml',
+  $enable_user_pass                = true,
+  $policy_file                     = 'heat_policy.yaml',
+  $template_generator_api_timeout  = 60,
+  $template_generator_api_parallel = 2,
 ) {
 
   include horizon::deps
diff --git a/releasenotes/notes/heat_template_generator-bc485a59c5e63b62.yaml b/releasenotes/notes/heat_template_generator-bc485a59c5e63b62.yaml
new file mode 100644
index 00000000..626fce13
--- /dev/null
+++ b/releasenotes/notes/heat_template_generator-bc485a59c5e63b62.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    The ``heat::dashboards::heat`` class now supports the following two
+    parameters.
+
+    - ``template_generator_api_timeout``
+    - ``template_generator_api_parallel``
diff --git a/spec/classes/horizon_dashboards_heat_spec.rb b/spec/classes/horizon_dashboards_heat_spec.rb
index f13b1114..558c4607 100644
--- a/spec/classes/horizon_dashboards_heat_spec.rb
+++ b/spec/classes/horizon_dashboards_heat_spec.rb
@@ -16,7 +16,6 @@ describe 'horizon::dashboards::heat' do
           }
 eos
       end
-
       it 'installs heat-dashboard package' do
         is_expected.to contain_package('heat-dashboard').with(
           :ensure => 'present',
@@ -36,6 +35,12 @@ eos
           "    'enable_user_pass': True,",
           "}",
         ])
+        verify_concat_fragment_contents(catalogue, '_1699_orchestration_settings.py', [
+          "HEAT_TEMPLATE_GENERATOR_API_TIMEOUT = 60"
+        ])
+        verify_concat_fragment_contents(catalogue, '_1699_orchestration_settings.py', [
+          "HEAT_TEMPLATE_GENERATOR_API_PARALLEL = 2"
+        ])
       end
     end
 
@@ -47,18 +52,40 @@ eos
           }
 eos
       end
-
       before do
         params.merge!({ :enable_user_pass => false })
       end
-
-      it {
+      it 'generates _1699_orchestration_settings.py' do
         verify_concat_fragment_contents(catalogue, '_1699_orchestration_settings.py', [
           "OPENSTACK_HEAT_STACK = {",
           "    'enable_user_pass': False,",
           "}",
         ])
-      }
+      end
+    end
+
+    context 'with template_generator parameters set' do
+      let(:pre_condition) do
+        <<-eos
+          class { 'horizon':
+            secret_key => 'elj1IWiLoWHgcyYxFVLj7cM5rGOOxWl0',
+          }
+eos
+      end
+      before do
+        params.merge!({
+          :template_generator_api_timeout  => 120,
+          :template_generator_api_parallel => 4,
+        })
+      end
+      it 'generates _1699_orchestration_settings.py' do
+        verify_concat_fragment_contents(catalogue, '_1699_orchestration_settings.py', [
+          "HEAT_TEMPLATE_GENERATOR_API_TIMEOUT = 120"
+        ])
+        verify_concat_fragment_contents(catalogue, '_1699_orchestration_settings.py', [
+          "HEAT_TEMPLATE_GENERATOR_API_PARALLEL = 4"
+        ])
+      end
     end
 
     context 'without the horizon class defined' do
diff --git a/templates/_1699_orchestration_settings.py.erb b/templates/_1699_orchestration_settings.py.erb
index f449a375..6c44ce49 100644
--- a/templates/_1699_orchestration_settings.py.erb
+++ b/templates/_1699_orchestration_settings.py.erb
@@ -32,7 +32,7 @@ settings.LOGGING['loggers'].update({
 })
 
 # Template Generator retrieve options API TIMEOUT
-HEAT_TEMPLATE_GENERATOR_API_TIMEOUT = 60
+HEAT_TEMPLATE_GENERATOR_API_TIMEOUT = <%= @template_generator_api_timeout.to_s %>
 
 # Template Generator retrieve options API PARALLEL LEVEL
-HEAT_TEMPLATE_GENERATOR_API_PARALLEL = 2
+HEAT_TEMPLATE_GENERATOR_API_PARALLEL = <%= @template_generator_api_parallel.to_s %>