Begin by logging into your Hub Planner account. Navigate to the section containing the data you wish to export. Use the built-in export functionality to download the data as a CSV or Excel file. This option is typically found under the 'Reports' or 'Data Export' section. Ensure that you select all necessary fields and records to be included in the export.

Open the exported CSV or Excel file in a spreadsheet application such as Microsoft Excel or Google Sheets. Carefully review the data for any inconsistencies, duplicates, or missing values. Clean the data by correcting errors, filling in missing values, and removing any unnecessary columns or rows. Save the cleaned file, preferably in CSV format, as it is more compatible with database import processes.

Ensure that your PostgreSQL server is set up and running. If not already installed, download and install PostgreSQL from the official website. Create a new database or choose an existing one where the data will be imported. Use a PostgreSQL client like pgAdmin or the command-line interface to manage your database.

Analyze the structure of your CSV file to determine the appropriate table schema in PostgreSQL. Create a table in your chosen database that matches the structure of the CSV file. Use SQL commands to define the table name, columns, data types, and any constraints such as primary keys or unique indexes.

```sql
CREATE TABLE hubplanner_data (
id SERIAL PRIMARY KEY,
name VARCHAR(255),
start_date DATE,
end_date DATE,
hours NUMERIC,
-- Add additional columns as needed
);
```

Use the PostgreSQL `COPY` command to import the data from the CSV file into the newly created table. This command reads from the specified CSV file and inserts the data into the PostgreSQL table.

```sql
COPY hubplanner_data(name, start_date, end_date, hours)
FROM '/path/to/your/exported_file.csv'
DELIMITER ','
CSV HEADER;
```

Ensure that the file path is correct and accessible by the PostgreSQL server. Adjust column names and types as necessary to match your table schema.

After importing the data, verify its integrity by running SQL queries to check for consistency. Look for discrepancies such as unexpected NULL values, incorrect data types, or missing records. Use SQL commands to perform basic data validation and ensure that the data was imported correctly.

```sql
SELECT * FROM hubplanner_data LIMIT 10;
```

Reviewing a sample of the imported data can help confirm that the process was successful.

If regular data transfers from Hub Planner to PostgreSQL are required, consider writing a script to automate the process. Use a scripting language such as Python or Bash to automate the export, cleaning, and import steps. Schedule the script to run at regular intervals using cron jobs (Linux) or Task Scheduler (Windows) to ensure that your PostgreSQL database remains up-to-date with the latest data from Hub Planner.