My 3yo Navien combi boiler quit working after a power outage, and we couldnt get it to turn on again. Hart was the first place to come to assess it. The tech, Jesse, told me that it was ruined due to being being clogged up by sediment from the galvanized pipes in our 101yo home. A new combi boiler would run about $20k or more. He said that Naviens were not as good quality as the boilers Hart installs and needed more frequent servicing. Furthmore, he said that we would have to replace all the pipes in our home, a project that would take a week and could cost as much as $40k.
I got another opinion.
Jesse never opened the boiler, did not check settings, did not flush it or otherwise do any diagnostics on it. The tech from the second company did. The second tech said the boiler is great. It needs a service and to be flushed, plus its pressure was low, possibly due to our city getting air into water lines during routine maintenance last summer. This second tech didn't find the leaks that Jesse claimed were a huge issue and said that our water lines, like the boiler, are fine. He also identified a mistake with the original installation, which likely led to the boiler having error codes.
Hart's ballpark estimates for work were $20k or more for a new boiler and $20-40k to replace all plumbing in our home, including the plumbing we had done as part of a remodel just 3 years ago. The second tech charged me $450 and everything is running perfectly now.
We do not recommend Hart for anything to do with a boiler or a combination boiler/water heater.