1. YUJU HVAC Solution Map

Different buildings, industries and living environments require different HVAC strategies. YUJU develops project solutions around actual climate, building use, environmental requirements, airflow, energy conditions and destination-market requirements.

Solution Area	Typical YUJU Support
Residential HVAC	Ducted heat pumps, all-air systems, fresh air, IAQ, radiant heating and smart zoning
Commercial HVAC	RTU, AHU, VRF, PTAC, ventilation, air distribution and centralized controls
Large-Capacity Rooftop HVAC	20–60+ Ton RTU, replacement engineering, airflow, ESP, fresh air, curb and duct coordination
R454B & A2L HVAC	R454B heat pumps, matched air handlers, A2L safety, certified system combinations, North American market compliance and OEM / private-label support
R454B Hydronic Air Handler	DX cooling combined with hot-water hydronic heating, ECM airflow, 24V controls, RDS safety, multi-position installation and U.S.-market OEM engineering support
Smart Zoning	YUJU Air Basic™ room controls, proportional dampers and variable airflow
HVAC Engineering	YUJU AIRFORM™ room loads, airflow, duct sizing, velocity and static pressure
Building Energy Management	HVAC monitoring, controls, alarms, energy data and centralized management
Organic Agriculture & Controlled Environment HVAC	Crop-based temperature, humidity and dew-point control, dehumidification, ventilation, air circulation, heat pumps and intelligent agricultural climate management
Climate & Energy Solutions	Future HVAC systems, heat recovery, condensate reuse, natural daylight integration, climate resilience and scenario-based environmental design
Fiber-Optic Daylighting	Natural sunlight collection, optical concentration, flexible fiber transmission, multi-point indoor distribution and lighting-control integration
Healthcare & Special Environments	Temperature, humidity, ventilation, filtration and project-specific environmental control
OEM & Project Support	Customized products, private label, compliance coordination and international supply

2. What YUJU Can Deliver

Some customers need individual HVAC equipment. Others provide architectural drawings, an existing HVAC system or a complete project specification and require engineering support.

Capability	YUJU Support
HVAC Equipment	Heat pumps, AHUs, rooftop units, PTAC, VRF, ducted systems and related HVAC equipment
Engineering Design	Load evaluation, room airflow, system configuration and equipment matching
Air Distribution	Duct sizing, static-pressure evaluation, supply / return air, diffusers and grilles
Smart Zoning	Room controllers, sensors, proportional dampers and variable airflow
Building Controls	VRF / AHU / FCU integration, monitoring, alarms, schedules and EMS
Indoor Air Quality	Fresh air, filtration, electronic air cleaning, UV-C and air-treatment solutions
Energy Solutions	Heat pumps, heat recovery, solar PV coordination and HVAC energy management
Natural Daylighting	Fiber-optic daylight collection and distribution, daylight sensors, artificial-light coordination and project-based integration with HVAC and energy management
OEM & Private Label	Branding, specifications, voltage, refrigerant, documentation and packaging
Low-GWP & A2L HVAC	R454B and other applicable low-GWP HVAC platforms, A2L system matching, safety documentation, certification support and market adaptation
Market Compliance	Project-specific certification, performance documentation and destination-market coordination
International Projects	Equipment supply, technical documentation, remote guidance, training and commissioning support

3. HVAC Equipment Behind Our Solutions

A complete HVAC solution begins with selecting equipment according to actual building, climate and environmental requirements rather than forcing every project into one product type.

HVAC Equipment	Typical Applications
Ducted Heat Pump Systems	Homes, villas, apartments and light-commercial buildings
Air Handlers / AHU	Residential, commercial and customized air-handling applications
Hydronic Air Handlers	U.S. residential HVAC applications combining DX cooling with boiler or water-heater supplied hydronic heating
Rooftop Packaged Units	Commercial buildings, replacement projects and new construction
Large-Capacity RTU	20–60+ Ton commercial and institutional rooftop applications
PTAC	Hotels, apartments, dormitories and individual rooms
VRF / VRV	Hotels, offices, commercial buildings and multi-zone projects
Air-Source Heat Pumps	Residential, commercial and agricultural heating / cooling
Air-to-Water Heat Pumps	Hydronic heating, fan coils, floor heating and hot water
Ground / Water Source Heat Pumps	High-efficiency building and energy projects
Fresh Air / ERV / HRV	Residential, commercial, education and IAQ applications
Dehumidification	Organic agriculture, greenhouses, CEA, indoor growing and high-humidity applications
Air Purification	AHU, ducted HVAC, fresh-air and indoor-air-quality projects
Fiber-Optic Daylighting Systems	Villas, basements, corridors, interior rooms, commercial interiors and daylight-integration projects
Controls & Dampers	Smart zoning, airflow regulation and building automation

4. From Architectural Drawings to Complete HVAC Design

For project customers, engineering often begins before the final HVAC equipment has been selected.

Customers can provide architectural drawings, room dimensions, project location, indoor design conditions and available building information.

5. YUJU AIRFORM™ HVAC Engineering

YUJU AIRFORM™ is a browser-based engineering workflow for multi-room ducted and all-air HVAC system design.

• Room-by-room cooling and heating requirements
• Required airflow for each room
• Total system airflow
• Main and branch duct sizing
• Air velocity verification
• Supply diffuser sizing
• Return-air requirements
• Static-pressure evaluation
• HVAC equipment capacity matching

6. Duct Design & Air Distribution

Correct HVAC capacity alone cannot guarantee comfort or environmental control. The required air must also reach the correct space at the required airflow and pressure.

• Room-by-room airflow
• Main and branch duct sizing
• Air velocity
• Duct resistance
• Critical air path
• External static pressure
• Supply diffusers
• Return-air grilles
• Plenums and transitions
• Fresh-air integration
• Noise considerations

7. YUJU Air Basic™ Room-by-Room Smart Zoning

Multi-room ducted HVAC systems rarely have identical demand in every room at the same time.

YUJU Air Basic™ connects room demand with proportional airflow control.

The system can also coordinate total active-zone airflow, minimum airflow protection and duct static pressure according to the final HVAC platform.

8. Large-Capacity Rooftop HVAC — 20 to 60+ Ton

Large commercial rooftop HVAC applications require more than nominal tonnage selection.

YUJU supports project-based large-capacity RTU applications for replacement, retrofit and new construction.

• 20 Ton, 30 Ton, 40 Ton, 50 Ton and 60+ Ton configurations
• Required airflow and CFM
• External static pressure
• Downflow or horizontal airflow
• Fresh-air intake
• Existing roof-curb coordination
• Supply and return duct openings
• 460V / 480V three-phase applications
• Coastal corrosion protection
• R454B, R32 and other applicable lower-GWP refrigerant platforms
• Replacement engineering

9. R454B & A2L HVAC for North America

The transition to A2L refrigerants is reshaping HVAC product design, system matching, safety requirements and market compliance across North America.

R454B is not simply a replacement refrigerant. For residential, light-commercial and commercial HVAC applications, the complete system may also involve new requirements for equipment design, indoor / outdoor unit matching, safety protection, energy performance and certification.

YUJU supports R454B and A2L HVAC applications including:

• R454B Heat Pump Systems
• Condensing Units
• Multi-Position Air Handlers
• Hydronic Air Handlers
• Ducted Split Systems
• Light-Commercial HVAC
• Rooftop Packaged Units
• Large-Capacity Rooftop HVAC
• OEM / Private-Label HVAC Programs

For North American ducted heat-pump applications, system selection should consider the complete matched configuration rather than nominal tonnage alone.

YUJU R454B & A2L HVAC solutions cover residential and light-commercial heat pumps, multi-position air handlers, rooftop HVAC and large-capacity commercial systems, with certification, OEM and private-label support for North America.

North American Certification & Market Support

Depending on the product category and application, North American HVAC projects may involve requirements related to:

• AHRI certified system combinations
• ETL / UL product safety requirements
• UL 60335-2-40 where applicable
• DOE energy-efficiency requirements
• CCMS product information
• Private Label / PBM programs
• Product labeling and documentation

YUJU can support customers with applicable product documentation, certification information, OEM configuration and private-label requirements according to the selected HVAC system and destination market.

R454B Hydronic Air Handler Solutions for the U.S. Market

Some North American residential HVAC applications require a different heating strategy from a conventional heat-pump or electric-heat air handler.

In a hydronic air handler configuration, the refrigeration system provides DX cooling during the cooling season, while a separate hot-water coil provides space heating using hot water supplied by a boiler or water heater.

This architecture is especially relevant to homes and retrofit applications where hydronic heating infrastructure is already available or where the project requires DX cooling and hot-water heating to operate as coordinated but independent thermal systems.

More Than a Standard R454B Air Handler

System Function	R454B Hydronic Air Handler
Cooling	R454B DX evaporator coil matched with the applicable outdoor cooling system
Heating	Dedicated hot-water hydronic coil
Heating Source	Boiler or water heater
Airflow	ECM blower configuration according to required CFM and external static pressure
Controls	24V thermostat and hydronic heating control integration
R454B Safety	RDS and applicable A2L safety configuration
Installation	Multi-position configurations evaluated according to cabinet, coil, drain-pan and project requirements
OEM Development	Existing-platform comparison, engineering modification, prototype evaluation, certification coordination and private label

Existing Platform + Engineering Modification

For OEM development, YUJU first evaluates whether an existing air handler platform can be adapted to the customer's target requirements. This can reduce unnecessary redevelopment, tooling cost and development time compared with starting from a completely new platform.

Typical development items may include hydronic-coil capacity, entering-water temperature, water flow, ECM blower performance, CFM versus ESP, cabinet dimensions, supply and return openings, electrical configuration, 24V controls, RDS integration and applicable U.S. certification requirements.

10. Smart HVAC & Building Energy Management

For larger residential, commercial and institutional buildings, YUJU can extend HVAC control from individual rooms to centralized building management.

• VRF / VRV systems
• Air handling units
• Fan coil units
• Fresh-air equipment
• Room environmental sensors
• Smart electricity meters
• Lighting controls
• Schedules and operating modes
• Alarm and fault records
• Floor-plan visualization
• Energy-use monitoring
• Centralized remote management

11. Fresh Air & Indoor Air Quality

Modern HVAC should manage more than temperature.

YUJU can integrate ventilation, filtration and indoor-air-quality technologies according to project requirements.

• Fresh-air ventilation
• HRV / ERV
• CO₂ monitoring
• Temperature and humidity monitoring
• High-efficiency media filtration
• Electronic air cleaning
• UV-C air treatment
• VOC treatment where applicable
• Whole-building air purification
• Fresh-air and AHU integration

12. Heat Pumps & Low-Carbon Energy

HVAC performance increasingly depends on how heating and cooling equipment interacts with the overall energy system.

• Air-source heat pumps
• Air-to-water heat pumps
• Ground-source heat pumps
• Water-source heat pumps
• Hydronic fan-coil systems
• Radiant floor heating
• Heat recovery
• Solar PV integration
• Optional energy storage
• HVAC energy monitoring
• Building energy management

13. Future HVAC Systems: Scenario-Based Design for Comfort, Energy and Controlled Environments

The future of HVAC is not defined by one product or one efficiency rating. It is increasingly shaped by how heating, cooling, ventilation, humidity control, air quality, lighting, water and energy systems work together in real operating environments.

YUJU approaches future HVAC from a scenario-based engineering perspective: understand the people, building, climate, process and energy conditions first, then configure the environmental system around those requirements.

Personalized Comfort

Different rooms, occupants and operating scenarios may require different temperature, humidity, airflow and ventilation conditions. Variable-capacity HVAC, room zoning, proportional dampers and smart sensing can help match system output to actual demand.

Energy & Resource Coordination

Future HVAC can coordinate cooling, heating, dehumidification, domestic hot water, lighting, renewable energy, thermal storage and building controls where project conditions support it. Waste heat from cooling or dehumidification may be evaluated for reheat, hot water or other useful heating loads, while condensate water may be considered for suitable reuse applications.

Climate-Resilient Environmental Systems

Heat waves, high humidity, extreme cold and power limitations create new design requirements. HVAC resilience may involve better building envelopes, efficient equipment, controlled ventilation, energy management, thermal storage and prioritization of critical spaces.

Controlled Environments

The same engineering principles can extend beyond conventional buildings. Agriculture, laboratories, healthcare, data-intensive spaces and other controlled environments may require coordinated temperature, humidity, airflow, filtration and energy management.

14. Fiber-Optic Daylighting & Natural Daylight Integration

Natural daylight can become part of the building environmental strategy when it is collected, transmitted and distributed in a controlled way.

YUJU is developing project-based fiber-optic daylighting concepts for spaces where direct windows or conventional daylight paths are limited. The system can collect sunlight at the roof or exterior, concentrate it into optical fibers and route the light flexibly to one or multiple indoor luminaires.

Why Fiber-Optic Daylighting?

• Flexible light transmission around building structures and interior walls
• Multi-point distribution from one daylight collection source
• Potential application in basements, corridors and interior rooms
• Can complement artificial lighting during suitable daylight hours
• Can be coordinated with illuminance sensors and smart lighting controls
• Can be evaluated together with shading, solar heat gain and HVAC load

Unlike a rigid daylight tube, optical fiber can follow a more flexible routing path and distribute collected daylight to multiple interior points. Final performance depends on solar conditions, collector design, optical efficiency, fiber length, routing, number of outlets and indoor illuminance requirements.

Typical Applications

• Luxury villas and custom homes
• Basements and underground spaces
• Interior rooms without direct exterior windows
• Corridors and circulation spaces
• Hotels and commercial interiors
• Showrooms and experience spaces
• Selected controlled-environment applications

15. Organic Agriculture & Controlled Environment HVAC

As technology, AI and automation continue to improve productivity, people are placing increasing value on something more fundamental: healthier food, cleaner air and a better quality of life.

For agriculture, healthier and higher-quality food begins with a healthier growing environment.

YUJU extends its HVAC engineering, heat pump, air treatment, dehumidification, air distribution, smart control and energy-management capabilities to organic agriculture and Controlled Environment Agriculture (CEA).

Organic agriculture is not created by HVAC alone. Seeds, soil or growing media, nutrition, irrigation, crop protection and farming practices remain essential.

However, excessive heat, high humidity, condensation, stagnant air and unstable day-night conditions can increase environmental stress and disease pressure.

A well-designed environmental-control system can help create more stable growing conditions, reduce some environmentally driven risks and support agricultural production methods that rely less on unnecessary chemical intervention.

From Crop Requirements to Environmental Control

Different crops, growth stages, planting densities, local climates, greenhouse structures and production methods require different environmental conditions.

For this reason, YUJU does not apply one standard HVAC configuration to every agricultural project.

The environmental system should be customized around actual biological, climatic, operational and energy requirements.

Why Humidity Control Is Different in Agricultural Environments

Agricultural spaces can contain substantial internal moisture loads from plant transpiration, irrigation, growing media and other water sources.

This means cooling capacity alone does not determine whether the growing environment can maintain the required humidity.

Outdoor ventilation can help remove moisture when outdoor air is sufficiently dry. However, under hot and humid outdoor conditions, excessive ventilation may introduce additional moisture and increase both sensible and latent cooling loads.

Environmental Requirement	Typical YUJU Strategy
Temperature	Heat pumps, cooling, heating and air-handling systems configured around crop and climate requirements
Humidity & Dew Point	Cooling dehumidification, dedicated dehumidification, heat-pump dehumidification and reheat where required
Ventilation	Outdoor-air strategies based on indoor and outdoor temperature, humidity and moisture conditions
Air Circulation	Airflow organization to reduce stagnant zones, temperature stratification and localized high humidity
Environmental Monitoring	Temperature, humidity, dew point, CO₂ and other project-required environmental parameters
Energy Optimization	Heat recovery, variable-speed equipment, heat pumps, solar PV coordination, energy storage and EMS-based operating strategies

Heat Pumps, Dehumidification & Energy Recovery

Heat-pump technology can be particularly useful in agricultural environments where cooling, dehumidification and heating requirements may occur at different times of the day or season.

During cooling and dehumidification, heat rejected by the refrigeration cycle can potentially be recovered for:

• Dehumidification reheat
• Nighttime auxiliary heating
• Process hot water
• Domestic hot water
• Other project-specific agricultural heat requirements

This creates opportunities to coordinate cooling and heating energy instead of treating them as completely separate systems.

Typical Agricultural Applications

• Organic greenhouses
• Vegetable and herb cultivation
• Nurseries and seedling facilities
• Mushroom growing facilities
• Indoor farming
• Plant factories
• Controlled Environment Agriculture (CEA)
• Post-harvest cooling and environmental control

Smart Agricultural Climate Control

Rather than operating ventilation, air conditioning, dehumidification, heat pumps and circulation fans independently, an integrated control system can coordinate the most appropriate operating mode according to real-time environmental conditions.

The final system configuration may include heat pumps, AHUs, dehumidifiers, fresh-air equipment, circulation fans, heat recovery, environmental sensors, smart controls, solar integration and energy management according to actual project requirements.

16. Healthcare, Education & Special Environment HVAC

Some projects require closer control of temperature, humidity, ventilation, air cleanliness and operating reliability.

Application	Typical HVAC Focus
Healthcare	Temperature, humidity, ventilation, filtration and reliable operation
Schools	Fresh air, CO₂, IAQ, low noise, smart control and energy efficiency
Laboratories	Environmental stability, airflow, ventilation, filtration and control
Hotels	Room comfort, PTAC / VRF, fresh air and centralized management
Controlled Agriculture	Crop-based temperature, moisture, airflow, ventilation and climate automation

17. Global Market Adaptation & Compliance

HVAC requirements vary between countries, states and individual projects.

Climate, refrigerant policy, electrical standards, energy-efficiency regulations, product certification and local installation requirements can all affect final equipment selection.

Market	Typical Considerations
North America	R454B, R32 and other applicable low-GWP refrigerant platforms, A2L safety requirements, AHRI certified combinations, ETL / UL requirements, DOE / CCMS compliance, energy efficiency and applicable local codes
Florida / Coastal USA	High temperature, humidity, corrosion, roof installation, wind-load and local approval considerations
Europe	Low-GWP refrigerants, seasonal efficiency, CE / applicable Ecodesign and project-market requirements
Middle East & Africa	High-ambient operation, T3 conditions where required, dust, voltage and equipment durability
Southeast Asia	Tropical cooling, high humidity, dehumidification demand, local energy-efficiency requirements, refrigerant regulations, corrosion resistance and voltage conditions
Other Markets	Project-specific climate, refrigerant, electrical, certification and installation requirements

YUJU does not assume that one standard certification package or product configuration applies to every country. Requirements should be confirmed for the exact equipment, project and destination market.

18. Real International HVAC Engineering Applications

YUJU's engineering capability is developed around real customer requirements rather than theoretical system descriptions alone.

19. OEM, Private Label & Customized HVAC

YUJU supports HVAC importers, distributors, contractors and brands that require project-specific or private-label equipment.

• OEM / private-label branding
• Customized specifications
• Voltage and frequency options
• Capacity and airflow configuration
• Refrigerant selection according to project and market
• R454B / A2L HVAC OEM programs
• R454B Hydronic Air Handler OEM engineering
• Customized controls
• Technical documentation
• Packaging customization
• Certification and market-compliance support
• AHRI / DOE / CCMS / Private Label coordination where applicable
• Project-based equipment matching
• Export and logistics coordination

20. How International Projects Work with YUJU

Physical installation outside China is normally completed by the customer's local HVAC or MEP contractor according to applicable local regulations.

YUJU can provide technical documentation, installation guidance, remote training, commissioning assistance and troubleshooting according to project scope.

21. Why YUJU

YUJU's value is not based on one individual HVAC product.

Our strength is connecting different parts of a project and adapting environmental technologies to the actual needs of each application.

• HVAC equipment sourcing and selection
• Building and room requirement evaluation
• AIRFORM™ engineering workflow
• Duct and airflow design
• Air Basic™ smart zoning
• Smart building HVAC controls
• Indoor air quality
• Large-capacity commercial HVAC
• Organic agriculture & Controlled Environment Agriculture climate engineering
• Future HVAC & scenario-based environmental system design
• Fiber-optic daylighting & natural daylight integration
• Heat pumps and low-carbon energy
• R454B / A2L and global low-GWP refrigerant solutions
• R454B hydronic air handler OEM engineering for North American applications
• Certification and market-compliance support
• OEM and private-label customization
• International equipment supply
• Project engineering support

This allows distributors, contractors, developers and project customers to work with one HVAC integration partner instead of treating equipment, engineering, environmental control and energy management as isolated purchases.

22. Start with Your HVAC Requirement

You do not need to have a completed HVAC design before contacting YUJU.

You can send us:

• Architectural drawings
• Existing HVAC model information
• Equipment schedules
• Required cooling / heating capacity
• Project city and country
• Building or application type
• Electrical requirements
• Indoor or environmental design conditions
• Required airflow / static pressure if known
• Local certification requirements
• Refrigerant requirements
• OEM or branding requirements

YUJU can then help determine whether the next step requires individual equipment, project-specific OEM products, an HVAC replacement solution, complete system engineering or a customized environmental-control solution.