Arrived onsite to be shown the existing hardwired detectors, are the smoke detectors that were recalled, as well as all the battery ones linked to them. We went throughout and found the foyer and office are hardwired, but the rest of the 6 in the house are all battery. They are leaving for a trip for 2 weeks and want them fixed today, but i also discussed the long term fix of hardwiring all the units together as well, which i wrote up an estimate for and will be sending them. For today, we will replace the hardwired unit in the foyer with a combo unit, and the one in the entry office with a hardwired smoke detector. The husband ran out and got battery ones for all the other locations that we installed as well. All detectors are verified working properly and they will reach out when they want to get them all hardwired next time.