Rang Dong Develops Bathroom Exhaust Fan With Light And Heater

Bathrooms present a unique set of environmental challenges - humidity, odor, temperature fluctuation and the need for reliable lighting - that typically requires several fixtures to address. The bathroom exhaust fan with light and heater, model DHPT, is a ceiling-recessed fixture that resolves five of these needs in a single, compact unit. Developed by Rang Dong, Vietnam’s leading manufacturer of high-quality home appliances and smart lighting products, model DHPT integrates LED illumination, exhaust ventilation, cooling fan, PTC heating and dehumidification into one cohesive bathroom solution. This article covers the product's specifications, standout features and practical applications. 

Model DHPT measuring 335×335×146 mm is designed for installation into a standard false ceiling opening. It operates at 220 V AC/50Hz with a total combined power draw of 2,050 watts across all active functions.  

The LED lighting module consumes 18 watts and delivers up to 1,620 lm of luminous flux, with three selectable color temperatures: 6,500 K, 3,000 K and 4,000 K. The LED light source has a rated service life of 25,000 hours. 

Rang Dong’s bathroom exhaust fan with light and heater, model DHPT. 

The 40-watt ventilation fan connects to a ducted exhaust system via a 103-mm diameter duct pipe up to 1,500 mm in length. The heating system runs on a 2,000-watt PTC (Positive Temperature Coefficient) heating element.  

The unit ships with two stainless steel duct clamps and a compatible duct end fitting. Control is handled via wireless Bluetooth Mesh, compatible with both a battery-free wireless remote and the RalliSmart app when paired with a smart home hub. 

Exceptional features 

Rang Dong’s model DHPT addresses a longstanding friction point in bathroom design: the inefficiency of installing and managing separate devices for lighting, ventilation, heating and humidity control.  

By housing all five functions - lighting, odor extraction, cooling fan, warmth and dehumidification - the fixture reduces installation complexity, saves ceiling space, and presents a cleaner visual result compared to a combination of several units. 

The heating function relies on PTC technology. Unlike conventional heating coils, a PTC element is self-regulating: its electrical resistance increases as temperature rises, which naturally limits heat output and prevents overheating without requiring an additional thermal cutoff component.  

Model DHPT includes a motor protection relay as another safeguard, and the heater is set to switch off automatically after 30 minutes of continuous operation. This automatic shutoff reduces energy waste and protects against scenarios where the heater is accidentally left on after the bathroom is vacated. 

The DHPT's PTC heating system warms the bathroom quickly while its automatic 30-minute shutoff and motor protection relay keeps the daily operation safe and energy conscious. 

The lighting module supports three switchable color temperatures, allowing users to choose between a cool daylight tone, a warm white and a neutral white. This level of flexibility is uncommon in bathroom ceiling fixtures and adds practical value for spaces used across different contexts throughout the day. 

The DHPT is rated for moisture and water resistance, making it appropriate for the humidity levels and occasional splashing typical of bathroom environments. 

The Bluetooth Mesh control protocol supports wireless operation through a battery-free push-button remote, removing the need for wired wall switches dedicated solely to this unit.  

When integrated with Rang Dong’s RalliSmart smart home ecosystem via a compatible hub, all the functions - lighting, fan speed, heating and dehumidification - can be controlled individually through the mobile app, including scheduling and automation. 

Applications 

Model DHPT is suited primarily to residential bathrooms where space, aesthetics and multi-function performance are all priorities.  

In apartments and smaller homes where the bathroom ceiling space is limited, consolidating five functions into one recessed unit avoids the clutter of multiple fixtures. The 335×335 mm recessed format fits naturally into standard gypsum board ceilings and leaves the overall ceiling surface clean and unbroken. 

Rang Dong's model DHPT installed flush into a false ceiling allows complete climate and lighting control for a modern residential bathroom. 

For households in cooler climates or during winter months, the 2,000-watt PTC heater provides rapid warmth immediately after activation, making it well-suited to cold-morning bathroom routines where step-in comfort is a priority.  

The dehumidification and exhaust functions work in combination to reduce post-shower condensation on mirrors, walls and surfaces, which extends the service life of bathroom fixtures and finishes while maintaining better air quality in the space. 

The smart control capability also makes the DHPT a fitting component of larger smart home installations. Homeowners using the RalliSmart platform can schedule the exhaust fan to run for a set duration after showering, activate heating before entering the bathroom, or adjust lighting color temperature according to a daily routine - all without physical interaction with the fixture itself. 

Beyond private residences, the DHPT is also suitable for hotel bathrooms, serviced apartments, guesthouses and other hospitality settings where a professional-grade, all-in-one bathroom climate solution is a desirable standard. 

Should you have any questions or request a quotation of Rang Dong products, please send us an email to: export@rangdong.com.vn 

Websites: en.rangdong.com.vn and vacuumflask.rangdong.com.vn