I had my old furnace replaced by Mandarin Heating and Cooling in Fall 2016. I got four quotes with comparable prices, and finally chose this company based on a recommendation of a colleague and the reviews on Homestars. Regretfully, I am very disappointed with their performance because of the followings:
Problems in vent termination.
After the work was completed, I checked the finished work against the installation instruction and found 3 major problems in the vent termination: (1) The air inlet and exhaust outlet terminals was too close (5.5 in), which was much less than the minimum allowed distance (12 in, in accordance to CSA International B149 installation codes). This problem may result in recirculation of the exhaust back into intake pipe, causing the furnace operates inefficiently and unsafely. (2) The heights of both terminals above the ground (16.5in) were lower than that of the required (20in, described below), and this may result in block of the terminations by snow accumulation. The installation instruction clearly states that 12in minimum clearance of termination above average snow accumulation is required; according to Environmental Canada, GTA yearly has 5.2 days with average snow accumulation ≥7.9 in”; therefore, the minimum height of the termination should be about 20in (7.9in + 12in). (3) The outlet vent was covered with a PVC screen while the installation instruction uses an “IMPORTANT” sign warns that: “Do not use screens in exhaust terminations. Doing so will cause freeze-ups and may block the termination.” Brian said the termination was fine, however, since I insisted corrections, Brian later sent other technicians and fixed these problems.
Eight unnecessary joints in a 6-feet gas pipeline.
Shut-off valve, elbow and drip leg are necessary, and the resulting joints are inevitable. However, in the finished 6-feet gas piping there are 8 more unnecessary joints. This is because short, mainly 6in, black pipes were coupled to replace long ones. There are 4 such extra couplings, resulting in 8 unnecessary joints (each coupling has 2 joints). For example, a 1-foot straight gas pipe inside the furnace was installed by coupling two 6in pipes. This "putting-remnant-together" kind piping is not only ugly-looking, but is also a safety concern. Brain explained that “using the coupling inside the furnace is a standard practice, it's 100% safe after leak testing”. However, it is a common sense: the more joints, the higher the gas leaking possibility.
The workmanship of Mandarin Heating and Cooling was poor. The operation was rough. For example, the furnace was pushed and dragged into the furnace room in a rude way regardless of the nearby water heater; the rug they used was pretty dirty and not long enough to cover the path; some mess was left in the furnace room, including a cigarette butt (brought in by shoes?).
In my opinion, the installation was unprofessional and the workmanship was bad, I don’t recommend this company!