installation

hi guys;
another hint for installation of any HVAC system in your house is good installation.
some customer just buying a good braproblemnd is enough and there should not have any have any problem then.but that is a big mistake. make sure the company that choosing is a professional one
and make sure they are e using the right material (TSSA certified and standard) for installation.
alsothey have to do proper installation,for example after installing the A/C you have to make sure the installer properly vaccum the system and keep it under vaccum for (-120psi) for at least 30 minutes