How to avoid printing sqlplus query output on the screen?

Sometimes, we have a shell script and inside we run a SQL query and we just want to spool the result in a file, without printing the output on the screen.
SET TERMOUT OFF will do the job, but only if it is inside a SQL script.

So this will work:

echo "set pages 0 feedback off  heads off echo off TERMOUT off" >> ${sql_v}
echo "spool Tmp/db.lst" >> ${sql_v}
echo "select distinct  db_name  from my_table order by  1;" >> ${sql_v}
echo "spool off " >> ${sql_v}
echo "exit; " >> ${sql_v}

sqlplus -s $MY_DB_CONNECT  @${sql_v}

But this will NOT work:

sqlplus -s $MY_DB_CONNECT << ENDofSql1
set pages 0 feedback off  heads off echo off TERM OFF
select distinct  db_name  from my_table order by  ENV_CODE;
exit
ENDofSql1

I thought of mentioning this, since it can be frustrating at times...