Otto Biller

Mr. Biller jun. even though we were not one of his customers, helped us immediately with problems with the underfloor heating and recognized and professionally corrected a colleague's mistake (who did not want to perform during the guarantee period!). We were very satisfied with his work and fast service and can recommend him at any time. Becker, Salem December 9th, 2020

We had a complete failure of our heating system (no heating, no hot water). Mr. Biller helped us extremely quickly, courteously and competently. We were very satisfied with his service and would definitely recommend him to others. Rudolf Deland, Uhldingen-Mühlhofen December 4th, 2020

Agreed dates are not adhered to. Despite demand. Feel no longer responsible for previous work. Years ago, the senior boss was very reliable. has now changed. Too bad.

We have always been very satisfied for many years.