Отопление и климат
Калькуляторы количества материалов на основе стандартных плотностей и норм расхода, с разумными запасами на отходы.
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BTU Calculator
Estimate rough heating/cooling output in watts and BTU/h from room volume and insulation quality, for planning purposes.
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AC Tonnage Calculator
Convert a cooling load in BTU/h (or a rough area estimate) into air-conditioning tonnage and kilowatts.
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Air Changes Calculator
Calculate air changes per hour (ACH) from airflow and room volume, or the airflow needed to reach a target ACH.