Partial Template

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

controllers.home.contact.js

import Ember from 'ember';

export default Ember.Controller.extend({
  mypasseddata: 'my passed contact data'
});

controllers.home.js

import Ember from 'ember';

export default Ember.Controller.extend({
  
  
});

controllers.home.service.js

import Ember from 'ember';

export default Ember.Controller.extend({
  mypasseddata: 'my passed service data'
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('home', function(){
  	this.route('service');
    this.route('contact');
  });
});

export default Router;

routes.home.contact.js

import Ember from 'ember';

export default Ember.Route.extend({
  renderTemplate: function() {
        // Render default outlet   
        this.render();
        // render extra outlets
        this.render("contact-header", {
            outlet: "header",
            into: "home"
        });
    }
});

routes.home.js

import Ember from 'ember';

export default Ember.Route.extend({
  
});

routes.home.service.js

import Ember from 'ember';

export default Ember.Route.extend({
  renderTemplate: function() {
        // Render default outlet   
        this.render();
        // render extra outlets
        this.render("service-header", {
            outlet: "header",
            into: "home"
        });
    }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

header{
  border:2px solid red;
}

p.service{
  background:yellow;
}

p.contact{
	background:lightblue;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<ul>
	{{currentRouteName}}
	<li>{{#link-to 'home'  }}Home{{/link-to}}</li>
  <li>{{#link-to 'home.service'  }}Service{{/link-to}}</li>
  <li>{{#link-to 'home.contact'  }}Contact{{/link-to}}</li>
</ul>
<br>
<br>
{{outlet}}
<br>
<br>

templates.contact-header.hbs

{{yield}}

	<p class="contact">Partial content for contact to be maintained in separate page </p>
  {{mypasseddata}}

templates.home.contact.hbs

<p>This is contact page content</p>

templates.home.hbs

<header>
	<h2>Home page header </h2>
  {{outlet 'header'}}
</header>

{{outlet}}

templates.home.service.hbs

<p>This is service page content</p>

templates.service-header.hbs

{{yield}}
<p class="service">Partial content for Service to be maintained in separate hbs file </p>
  {{mypasseddata}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}