Water Heaters (Non-Solar) federal tax credit of $300.00 Water Heaters (non-solar) Water heaters Water Heaters (non-solar) Water Heaters (non-solar) Water Heaters (non-solar) tax credit of $300 Water Heaters Water Heaters (non-solar) Non-Solar Water Heaters Water Heaters (non-solar) Water Heaters (non-solar) tax rebate Water Heaters (non-solar) tax credit of $300 federal tax credit for non-solar water heaters. $300 tax credit