1. **Perfect Replacement**: The Upgraded 9815WH In-Wall Heater is designed as a perfect replacement for the broan-nutone 9815WH model. It fits seamlessly into existing wall can sizes of 10.5 x 12.5 x 3.37 inches, making it an ideal choice for those looking to upgrade their current heating system.

2. **Fast Heating**: Equipped with a large silent crossflow fan and a 1500W nickel chrome heating element, this heater can efficiently warm up a well-insulated 120 sq ft room to a comfortable temperature in less than 10 minutes, all while maintaining a noise level of less than 22 decibels.

3. **Reliable Quality**: Safety is a top priority with this heater. It features a permanently lubricated motor, a highly efficient and silent fan, a stable thermostat, and a high-temperature safety shut-off device to ensure reliable and safe operation every time.

4. **Effortless Temperature Control**: The adjustable thermostat allows for easy heat output control with a simple turn of the dial, making it user-friendly for all household members, including the elderly.

5. **Aesthetic Design**: With its white grille panel and embedded installation, this heater not only saves space but also adds an elegant touch to any room, including bathrooms, bedrooms, offices, garages, and RVs.

6. **Customer Feedback**: Some users have reported issues such as missing wall mount metal boxes, non-functional units upon arrival, and poorly fitting knobs. However, the manufacturer offers responsive customer service and one-year service support to address any concerns promptly.