Methods and systems are disclosed with regard to a transition used in air conditioning systems having box evaporator coils. The ratio of acrylic polymer to polyol andor diol is between about 90:10 and about 10:90 by weight, preferably about 50:50. The optical network further comprises a wave division multiplexer combiner, coupled to the plurality of OLT devices, for combining optical signals received from the plurality of OLT devices.