These 72 hour shipping warmers are best for three shipments. Remain patient as these heat packs can take 60 minutes to start generating noticeable heat. UniHeat shipping warmers are the first designed especially for small pets, tropical plants and other temperature sensitive products.
For best results it's important to open your shipping warmers well ahead of your intended pack out time. This will give you amply time to make sure they activate properly. During this time it's important to make sure your heat packs are properly staged as well. We've found it's best to allow them to heat up in the shipping container you'll be using them in. This will prevent your heat pack from coming into contact with any solid, cold surface which may cause your heat pack to stall out from heating up properly.
Once you've noticed that the heat pack is warming it's important to wrap them individually in newsprint. Newsprint fosters the ideal environment for your heat packs to continue to rise towards their peak temperature. Remember all heat packs need to breath in order to generate heat. Newsprint provides a breathable barrier that will insure your heat pack ventilation holes do not become blocked once placed in the shipping containment.
Finally be aware that shipping methods and requirements are going to vary in each shippers personal scenario. In order to repeatably make successful shipments it is strongly recommended that each shipper performs trials test to establish safe procedure that is tailored to your own personal situation.
Another great order from Aquatic Packaging. Easy and fast. Thank you.
I purchased several of the heat units from this company approximately a year ago. I used a couple and they worked just fine. Recently I needed to use another heater for an aquarium plant shipment I was doing, I opened 4 of my remaining heat packs and none of them worked. They didn't even get slightly warm. I called the manufacturer (Uniheat) and they will only deal with distributors. I in turn contacted aquatic packaging and informed them of my situation. I purchased a total of 10 and only 3 of them actually worked. The expiration on the packaging still had another year remaining. Aquatic packaging respectfully replaced all the non-working heat packs. I'll definitely be purchasing from them again in the future.
Just as described, good ship time and the best value I could find A+
Uniheat packs never let me down....wrap in a 1/2 sheet of newpaper and you're ready to ship :) I use more 72hrs packs than any other size, but have had great result with all the sizes.