TOPSHEATER is a national high-tech enterprise operating with “exacting standards, a premium foundation, and rigorous requirements”. Specializing in manufacturing “-35°C ultra-low temperature air source heat pump” series, we have earned global acclaim for “superior quality and exceptional service”, with products exported to 76 countries and regions worldwide.
Equipped with cutting-edge R&D facilities, our labs hold dual certifications from China’s National Air Conditioning Equipment Quality Supervision & Inspection Center and National Compressor & Refrigeration Equipment Quality Supervision & Inspection Center, including:
“-35°C Ultra-Low Ambient Temperature Air Source Heat Pump R&D Lab” (comprehensive performance assessment)
Air Conditioning/Drying Heat Pump Enthalpy Difference Lab
Long-Term Fatigue Testing Lab
Vibration Stress Test Platform
Fully Automated Commercial Inspection System
Since inception, we have prioritized market needs, adapted to industry shifts, and led market trends. Through years of innovation, we established a robust R&D ecosystem featuring the “4+1” High-Tech Intelligent Platform, securing over 100 patents. As a pioneer, TOPSHEATER continues to drive standardized progress in the heat pump industry with groundbreaking contributions.
For regions with electricity restrictions, users can enable the power-outage memory feature. In case of a power failure, the heating unit retains its pre-outage operating status and resumes seamlessly once power is restored.
Our computer-simulated stress and vibration analysis optimizes the unit’s structural design, pipeline layout, and component placement via 3D modeling. This prevents stress concentration or resonance during transport, installation, or operation, eliminating noise and structural damage.
Osdan’s systems employ electronic expansion valves (EEV) for precise refrigerant flow control. Compared to thermal expansion valves, EEVs instantly adapt to temperature extremes, ensuring stable operation, extended heating durations in cold climates, reduced defrost cycles, and enhanced heating capacity.
Osdan’s control system monitors outdoor ambient and heat exchanger fin temperatures in real time, intelligently triggering defrost mode only when necessary. By avoiding unnecessary defrost cycles or incomplete ice removal, it boosts defrost efficiency and heating performance.
During heating/defrost cycles, water accumulation can freeze in high-humidity environments, impairing system performance. Osdan’s patented “Dual-Condensation Drain Pan Ice Melt” (Patent No.: 2016200011481, Utility Model) ensures thorough ice elimination, maintaining peak unit efficiency.
Our extra-wide 8-row fin design maximizes airflow contact, increasing heat absorption and ensuring uniform, efficient heat transfer.
Two operational modes: fixed or climate-compensated. In climate mode, the system auto-adjusts water supply temperature based on outdoor conditions via a compensation curve, preventing indoor temperature fluctuations (±5°C adjustable range) for optimal comfort.
The central control system monitors real-time temperatures across components, instantly directing the compressor, fan, and EEV to synchronize adjustments—achieving ultra-fast thermal response.
To prevent pipe freezing, the system activates intelligent frost-protection mode when low ambient/water temperatures are detected, maintaining operation until safe thresholds are restored.
We are committed to innovation and excellence in technology, ensuring that our products meet the highest standards and provide cutting-edge solutions for our customers.
To be an innovative enterprise of healthy, intelligent and comfortable home appliances
