THLaircon

Sorry did not see the post above. Normally when they "On" You, sitting at the table, they will start to sell you upgraded materials. The standard materials alot of company use is 3/8 Thermaflex and 24gauge copper and 13 mm. At around $2890 you can get the same thing but upgraded to 1/2" class 1 armaflex, 23gauge copper tubing, 16mm Drainage pipe, 2 trips foc and such.

Advice on?

if the installation like above, improperly done, insects are found inside... and leakages occurs easily...