A small kiln for firing ceramic products has inside dimensions 1 m wide, 1 m high, and 1.5 m deep. The walls are 50 cm thick and made of zirconia brick. At steady operating conditions the inside temperature is 700oC, and the ambient air temperature is 25oC. If the outside heat transfer coefficient is approximately 5 W/(m2K), estimate the heat loss from the kiln. Take k = 2.4 W/(mK) for zirconia brick.