The first time time I contacted Northwood was the first summer when we moved to the new house. For some reason, after we started using the air conditioning and for some reason after a few hours it stopped working.
I researched on sever review sites, including HomeStars, and found good references for Northwood. We booked an appointment in the next few days. They arrive at the time we agreed, assessed the situation and solve the problem replacing a faulty water pump. Since then I use their services for the furnace and air conditioning regular maintenance.
Just last year when they were doing the maintenance they spotted a gas pipe that was placed on the wrong location and against code and regular security measures. It was left that way by some Enbridge contractors who replaced the gas lines in the whole neighbourhood and didn't do a good job. They reported the issue, and that helped to force Enbridge to come again and do the job properly this time.
Northwood even followed up to see how the issue was solved. This is certainly good quality service.
I thought their services would we more expensive than average due to their relations with some well known TV home renovation shows, but it was a pleasant surprise they are not. The only difference is they pay a lot of attention to their service and their reputation, which end up being good for their clients.