It was a winter night, before the temperature dropped to -20C and my heating system was not working. I called Heating Ontario after three other companies refused after-hour service. Mr. Or Sela came late that night to troubleshoot the system. He found that the heating radiators lost water and the water valve was not filling the system. Or stayed late that night and filled the system with the water house that he brought, so I had heat again that night. I was very impressed by Or’s quick troubleshooting and emergency actions. Thank you, Or. I highly recommend Heating Ontario for knowledgeable technicians but mostly for excellent service.