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The degree of insulation is set with the K factor in the heating calculation. The factor for heat gain through engine room bulkheads is a pure guess. The heat gain from AC and DC equipment is factored at 3.4 - 4.3, while NRCAN suggests 3.0 for AC appliances in a house.
== Control Zones ===
For heating, ventilation and air-conditioning distribution and control purposes, the boat is divided into the zones in the next table. With a K=1, Sharina requires approx. 37,810 BTU/h of heating. The main diesel furnace supplies this, sufficient for the coldest weather.
== Related Systems ==