Heat Exchanger sales database building (Hungarian Market)

I need a structured list of every company active in Hungary that could be interested in heat exchangers. While HVAC is the obvious starting point, please also capture clients in chemical, pharmaceutical, food-and-beverage and any other sector where these units are common.

For each company gather three items of contact data:
Name
• Email address of at least one email(possibly procurement or man of operations
• phone number (direct line if available)
• Registered postal address

Deliver the information in a clean, filter-ready spreadsheet (Excel or Google Sheets is fine) with separate columns for company name, industry focus, and the three contact fields above. Accuracy matters more than volume, so double-check