These CTM series MaxAlloy aluminum multi-position indoor coils are designed to be installed with furnaces or modular blowers and system-matched with air conditioners or heat pumps. These coils are certified for use with R454B refrigerant. To ensure optimal performance, all CTM coils must utilize a TXV matched to the specific outdoor component. Refer to the Technical Guide for the outdoor unit selected as part of your system. Select models are available with factory-installed EEV for Variable Capacity system matches.