I called Larsell Mechanical Services about twice I believe to help out at a rental property. I can't really attest for how the heater works as I don't live at the property, but I can say that the people with Larsell are super easy and nice to communicate with. They responded quickly and repaired the heater right up. Last time took a couple of days since they needed to buy new parts but as far I know they did a great job. I would recommend them to others and really appreciated their customer services skills!