HVAC Application & Field Engineer

About ONYX NOVAONYX NOVA provides engineered humidity control and indoor air quality solutions for residential, commercial and specialized environments across the UAE.Our solutions include ducted and ceiling-integrated dehumidification systems, fresh-air treatment solutions and high-capacity units integrated with existing HVAC systems.We are looking for a hands-on HVAC engineer who will become the company’s key technical specialist and support the development of our dehumidification and indoor air quality projects.Role OverviewThe HVAC Application & Field Engineer will be responsible for assessing customer sites, selecting suitable dehumidification solutions and determining the correct method of integration with existing air-conditioning and ventilation systems.The role requires strong practical knowledge of HVAC airside systems, airflow, ductwork and equipment installation.The successful candidate must be able to inspect an existing HVAC system, understand how air is moving through it and recommend where and how a dehumidifier should be installed to achieve the required performance without negatively affecting the existing system.This is a practical, customer-facing engineering role combining site inspections, technical calculations, solution design, installation support and client communication.Key ResponsibilitiesConduct technical site inspections at villas, apartments, hotels, commercial facilities, warehouses and other properties.Inspect existing HVAC and ventilation systems, including AHUs, FCUs, FAHUs, packaged units, supply and return air ducts, fresh-air systems and exhaust systems.Review HVAC drawings, duct layouts, equipment schedules and technical specifications.Measure or verify airflow, temperature and relative humidity conditions at site.Assess humidity sources, ventilation rates, infiltration and fresh-air loads.Calculate the required dehumidification capacity and recommend the appropriate number and model of units.Determine the most effective installation location and integration method for each dehumidifier.Develop practical integration concepts for:supply-air duct installation;return-air duct installation;fresh-air treatment;independent supply and return configurations;ceiling-integrated systems;rooftop installations;installations alongside AHUs, FCUs and packaged AC units.Evaluate airflow availability and confirm whether the existing HVAC fan can provide sufficient airflow through the dehumidifier.Assess the effect of the proposed installation on external static pressure and the performance of the existing HVAC system.Review duct dimensions, velocities, pressure drops, filters, grilles, dampers, flexible ducts and other components affecting airflow.Identify risks such as insufficient airflow, air bypass, short-circuiting between supply and return air, excessive static pressure, condensation inside ducts, noise, vibration and improper condensate drainage.Recommend duct modifications, balancing dampers, access panels, insulation, condensate drainage and other installation requirements.Prepare technical installation concepts, mark-ups, sketches and scopes of work for contractors.Explain technical solutions clearly to customers, consultants, MEP contractors and installation teams.Answer customer questions regarding:compatibility with existing air-conditioning equipment;required airflow;static pressure;duct integration;fresh-air and return-air management;condensation risk;condensate drainage;electrical requirements;controls and operating logic;expected dehumidification performance.Support the sales team during technical discussions and customer meetings.Coordinate with MEP contractors, ducting contractors, electricians and other subcontractors.Supervise or inspect installations and confirm compliance with the approved technical solution.Participate in testing, commissioning, airflow balancing and performance verification.Investigate underperforming installations and identify the root cause.Prepare site inspection reports, equipment selection calculations, technical proposals and commissioning reports.Build and maintain internal engineering standards and typical installation solutions for ONYX NOVA products.Required ExperienceMinimum 5 years of practical experience in HVAC, ventilation or airside systems.Strong hands-on experience with HVAC installations, site inspections, troubleshooting or project execution.Practical knowledge of:airflow calculations;duct sizing;duct velocity;pressure drop;external static pressure;fan performance;supply and return air systems;fresh-air ventilation;AHUs, FAHUs, FCUs and packaged AC units;air balancing;duct insulation;condensation prevention;condensate drainage.Ability to understand HVAC drawings, equipment schedules, technical datasheets and fan performance information.Ability to convert site conditions and customer requirements into a practical installation solution.Experience working directly with technicians, duct installers and MEP contractors.Ability to communicate technical matters clearly to customers who may not have an engineering background.Good written and spoken English.Valid UAE driving licence.Preferred QualificationsBachelor’s degree or diploma in Mechanical Engineering, HVAC, Refrigeration or a related discipline.Previous UAE or GCC experience.Experience with dehumidification, humidity control, indoor air quality or fresh-air treatment systems.Experience with residential villas and retrofit HVAC projects.Knowledge of psychrometrics, latent and sensible loads, dew point and moisture load calculations.Familiarity with AutoCAD or another tool for reviewing and marking up HVAC layouts.Familiarity with ASHRAE standards and UAE HVAC requirements.Experience in testing and commissioning or TAB — Testing, Adjusting and Balancing.Important Profile RequirementsThis position is not suitable for an engineer whose experience is limited only to office-based design or theoretical calculations.We are looking for someone who:understands how HVAC systems work in real site conditions;can inspect an installation personally;is comfortable working above ceilings and on rooftops;can identify practical installation problems;can communicate with both customers and technicians;takes ownership of a project from inspection through commissioning;can make technically sound decisions independently.Success in This RoleThe engineer will be considered successful when:equipment is selected correctly for each project;dehumidifiers are integrated without negatively affecting the existing HVAC system;installation teams receive clear and practical instructions;technical questions from customers are answered promptly and professionally;projects achieve the required humidity levels;installation and commissioning problems are identified before they lead to customer complaints.