It's units in 6 different rooms (3 bed, office, living, dining) so 6 sets of units.
After reading some other comments I realize one vital detail is that they were installed in a renovated house that already had suitable holes to the outside and power outlets where the units were going, so the install job was just mounting the units, pulling the tubing and gassing it, no cutting things up or doing electrical work.
The price would at least double if we needed all the holes cut open, and I have no idea what the electrical work would cost.
After reading some other comments I realize one vital detail is that they were installed in a renovated house that already had suitable holes to the outside and power outlets where the units were going, so the install job was just mounting the units, pulling the tubing and gassing it, no cutting things up or doing electrical work.
The price would at least double if we needed all the holes cut open, and I have no idea what the electrical work would cost.