Load balancing Search service application Sharepoint 2013

I have a SharePoint farm with 2 front end servers and two application servers. The search service application is going to used very heavily. So I need to ensure that the search service application is load balanced.

I have created a search service application

How do I load balance it on another application server.

1. Do I need the application and Load balancer service


2. start the search service only on both the application services


3. Will this ensure that the service application is load balanced.