Given a choice, I would prefer to reduce heptanal with NaBH4 rather than with LiAlH4.
The alkoxide salts produced via LiAlH4 reduction are insoluble and must be carefully hydrolyzed during workup (i. e., prior to isolation of the reduction product, heptanol). Since the corresponding NaBH4 reduction is performed in aqueous ethanol, the requisite hydrolysis is achieved in situ along with reduction of the aldehyde.