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"The Modulating Plus (MP) Series of modulation infrared heaters allow users to select a desired operation for their specific needs through the incorporation of three performance curves, as well as a Blast Mode. The Blast Mode allows users to temporarily lock the heater into its highest input with an extra 5,000 Btu for extreme environmental demands. The models available in the MP Series range from 80,000&nbsp;to 200,000 Btu. The MP Series features full gas modulation with corresponding airflow modulation to allow for optimal fuel utilization. Detroit Radiant Products Co. www.reverberray.com"
<https://www.csemag.com/articles/modulation-infrared-heater/>