48x187mm Cross Flow Fan 15W with PTC Heater for Bathroom and Wall Heaters

The values below are the specification we build the CF-4815-187-P to. Airflow is measured at free discharge and rated voltage; with a grille, filter or heat exchanger in the airflow path, expect a reduction of 15-25 percent.

Typical duties for the CF-4815-187-P. Bathroom heater, wall heater, space heater.

• Bathroom heaters - The 48 mm barrel and 1,500 RPM speed keep noise low in a room where the fan is mounted at head height, while the PTC element delivers warm air quickly.

• Wall-mounted and panel heaters - Shallow housings accept the 48 mm diameter where a 60 mm fan would not fit.

• Space heaters and fan heaters - Self-regulating PTC behaviour adds a safety layer in portable appliances.

• Drying and warming cabinets - Low airflow at low noise suits small enclosed volumes where turbulence is undesirable.

Matching the fan to the duty

The 48 mm platform trades airflow for size: 50-80 m³/h is roughly half a 60x180 barrel. Use it where the enclosure depth is fixed at 60-70 mm, not where maximum airflow is the priority.

Installation

Fit the PTC stack downstream of the impeller with at least 20 mm clear. Earth-bond the fin stack and fit an independent thermal fuse; the PTC's self-limiting behaviour is a backup, not a substitute for a fuse.

The CF-4815-187-P is built in our own plant, so the specification can be adjusted to your appliance rather than the other way round. Options below are quoted against the base build.

What can be customized

• Fan-only version without the PTC element.

• Barrel lengths of 120, 187 and 240 mm on the 48 mm platform.

• PTC wattage matched to your target outlet temperature.

• Custom lead length and terminal type.

• CW rotation for mirrored housings.

• Private label and retail packaging.

Manufacturer

Manufactured by Guangzhou Yuexun Electric Appliance Co., Ltd. (YKFANMOTOR) in Guangzhou, China, part of a family motor business with more than 28 years of manufacturing experience. CE and RoHS documentation is supplied where the model carries those marks; IEC test reports can be arranged for custom builds.

Frequently asked questions

Q: What is a 48x187 cross flow fan used for?
A: It is a compact heater fan for bathroom heaters, wall panels and space heaters. The 48 mm diameter fits shallow housings, and the 187 mm barrel spreads warm air across the outlet grille at 50-80 m³/h.

Q: Why 48 mm instead of 60 mm?
A: Twelve millimetres of diameter often decides whether a heater body fits a standard wall box. The 48 mm platform gives up roughly half the airflow of a 60x180 barrel in exchange for that packaging advantage.

Q: How does the PTC heater control temperature?
A: Ceramic PTC material raises its resistance as it heats, so power falls as temperature rises. The element reaches a stable point instead of running away, which is why it is favoured in appliances where airflow can be obstructed.

Q: Is the fan noisy at 1,500 RPM?
A: No - 1,500 RPM is deliberately slow. It is the quietest configuration in the range, chosen because bathroom heaters sit close to the user.

Q: Can I order it without the heater?
A: Yes. The same housing and motor are supplied fan-only, which is useful when a heater platform has both fan-only and heated models.