I have had some issues with the initial quality of service and attention to detail by the teams at Aire One, however they have always worked with me to resolve the issues. There were issues with a furnace install that I had done which they came back and fixed, however I had to troubleshoot the wiring of the thermostat to get our air conditioner to work. We also had issues with a tankless water heater install which required 4 service calls and two weeks to sort out. The issue mostly stemming from the first team who had issues with a new gas line and replaced our copper plumbing with the same size PEX which reduced the water pressure to not usable. A second team had to come out to commission the tankless water heater with a replacement gas line took 6 days from quoting to commission. Took another week to get the water pressure sorted out replacing the PEX with copper pipes. There was also issues with charges that Aire One said they would modify and didn't follow through before I was charged for service at not agreed upon pricing, which was later resolved. I'm sure more conventional service is no issue but dealing with older houses may be an issue, but at least they followed through and fixed mistakes.