Either the Grizzly, or Havana release of OpenStack is required. If you are using Grizzly, you should use the stable/grizzly branch of Heat.
Instructions for installing the RDO OpenStack distribution on Fedora are available at http://openstack.redhat.com/Quickstart
Instructions for installing Heat on RDO are also available at http://openstack.redhat.com/Docs
Alternatively, if you require a development environment not a package-based install, the suggested method is devstack, see instructions at Heat and Devstack
Check out the example templates at https://github.com/openstack/heat-templates. Here you can view example templates which will work with several Fedora versions.