The Upgraded 9815WH In-Wall Heater by ZHONTIN promises efficient heating with a sleek design, suitable for various rooms including bedrooms, living rooms, and bathrooms. Here's a detailed look based on user experiences and product features.

Performance: The heater boasts a 1500W nickel chrome heating element and a silent crossflow fan, capable of heating a 120 sq ft room in under 10 minutes. However, some users reported issues with the heater not functioning upon arrival, indicating potential quality control problems.

Design and Installation: Designed for in-wall installation, it features an adjustable thermostat for easy temperature control. Despite its aesthetic appeal and space-saving design, there were complaints about the knob not fitting flush and discrepancies in color as advertised.

Safety and Reliability: ZHONTIN emphasizes safety with features like a high-temperature safety shut-off device. Yet, some users encountered wiring issues upon delivery, suggesting that the product may require additional checks or repairs before use.

Customer Support: The product comes with a one-year service support and detailed user manual. However, the mixed reviews on functionality post-purchase highlight the need for responsive customer service to address these concerns effectively.

In conclusion, while the Upgraded 9815WH In-Wall Heater offers promising features for efficient heating and aesthetic integration into home decor, potential buyers should be aware of the reported inconsistencies in product quality and functionality.