该小组履行以下部分或全部职责：

• 阅读和解读蓝图、图纸或其他规范
• 测量并布置安装参考点
• 使用手动和电动工具组装和安装制冷或空调部件，例如电机、控制器、仪表、阀门、循环泵、冷凝器、加湿器、蒸发器和压缩机
• 测量和切割管道，并使用焊接和钎焊设备连接管道
• 安装、故障排除和检修整个供暖、通风、空气处理、制冷和空调系统
• 启动系统并使用测试设备测试泄漏
• 用制冷剂重新充注系统，检查和测试调节器，校准系统并执行日常维护或维修
• 维修和更换整个制冷、空调、通风或热泵系统的零部件
• 可能在用于运输食品或医疗用品的冷藏车中安装、维护和修理设备
• 可为客户准备工作估算。

• 通常需要完成中学和培训课程或职业课程。
• 通常需要完成三到五年的学徒计划或五年以上的制冷和空调维修工作经验和行业课程，才有资格获得行业认证。
• 新斯科舍省、新不伦瑞克省、魁北克省、安大略省、马尼托巴省、萨斯喀彻温省和阿尔伯塔省的制冷和空调机械师行业认证是强制性的，所有其他省份和地区都提供，但自愿性。
• 新不伦瑞克省和艾伯塔省提供运输制冷技工行业认证，但属于自愿性质。
• 成功完成省际红印章考试后，合格的制冷和空调技工也可以获得红印章背书。

• 随着经验的积累，可能晋升到主管职位。
• 红印章背书允许跨省流动。

• 空调和制冷技工工头/女工（72020 承包商和主管，机械行业）
• 家用窗式空调维修；家用冰箱维修工（在72421 Appliance services and repairers中）

This group performs some or all of the following duties:

• Read and interpret blueprints, drawings or other specifications
• Measure and lay out reference points for installation
• Assemble and install refrigeration or air conditioning components such as motors, controls, gauges, valves, circulating pumps, condensers, humidifiers, evaporators and compressors using hand and power tools
• Measure and cut piping, and connect piping using welding and brazing equipment
• Install, troubleshoot and overhaul entire heating, ventilation, air handling, refrigeration and air conditioning systems
• Start up system and test for leaks using testing devices
• Recharge system with refrigerant, check and test regulators, calibrate system and perform routine maintenance or servicing
• Repair and replace parts and components for entire refrigeration, air conditioning, ventilation or heat pump systems
• May install, maintain and repair equipment in refrigerated trucks used to transport food or medical supplies
• May prepare work estimates for clients.

• Completion of secondary school and training courses or a vocational program is usually required.
• Completion of a three- to five-year apprenticeship program or a combination of over five years of work experience and industry courses in refrigeration and air conditioning repair is usually required to be eligible for trade certification.
• Trade certification for refrigeration and air conditioning mechanics is compulsory in Nova Scotia, New Brunswick, Quebec, Ontario, Manitoba, Saskatchewan and Alberta and available, but voluntary, in all other provinces and the territories.
• Trade certification for transport refrigeration mechanics is available, but voluntary, in New Brunswick and Alberta.
• Red Seal endorsement is also available to qualified refrigeration and air conditioning mechanics upon successful completion of the interprovincial Red Seal examination.

• Progression to supervisory positions is possible with experience.
• The Red Seal endorsement allows for interprovincial mobility.

• Air conditioning and refrigeration mechanic foreman/woman (in 72020 Contractors and supervisors, mechanic trades)
• Domestic window air conditioner repairer; domestic refrigerator repairer (in 72421 Appliance servicers and repairers)