It’s perhaps unnecessarily showy and I would have preferred some kind of graph or useful info- but accept most people only care how cold it feels!

It works even when detached from the WAVE 2 - though charging it needs a WAVE 2 or DELTA 2 - and carries just over 1KW/h which you can tap into via a 100W USB Type-C or 18W USB A port. The crux is that it lasted about six hours- a combination of two hours on Max and four hours on Eco. WIRED may earn a portion of sales from products that are purchased through our site as part of our Affiliate Partnerships with retailers. It sort-of feels like you should then be able to use the carry handle to lug the whole setup, but I’m not sure the latch mechanism is designed for this. Draining the unit with the battery attached is tricky, since it brings the total weight from a modest 14kg up to over 20kg, and separating the two without unleashing the water is similarly difficult.The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Condé Nast. For air conditioning, the EcoFlow Wave 2 is rated at a maximum of 5100BTU, although that assumes mains power, which it draws 550W; on battery power, power consumption is slightly reduced to 495W.

With the option of an add-on battery, the EcoFlow Wave can run for 3-12 hours, depending on the battery you use. You can (fairly) easily separate the battery and unit to carry them separately if you need to, and I’ve done this simply to save my back- I’m pretty sure this thing weighs more than our toddler and hefting him has been giving me a hard time. I will also evaluate the WAVE 2’s portability by lugging it around the house and using it in its various configurations to cool other rooms. Indeed if you want to vent out of a window it’s not just blocking up the open window area you’ll need to take into account, but how you’ll block out the enduring daylight of summer too. But, for the sake of argument, we’ll accept that 9000 BTUs is sufficient for a room of 25 square metres in direct sunlight and 15 in shade.It mostly hovered around 400 watts in the standard mode, and I measured sound at around 50 decibels. Pair your WAVE 2 with an EcoFlow DELTA 2, and you'll get an astonishing 7 hr run time in WAVE 2 Eco Mode. When the compressor is on and cold (rather than cool) air is blowing out of the outlet it’s pushed up and over the bed creating a cooling breeze effect across the width of our room.

This means when a blackout hits, you can continue to power your important home devices such as your fridge and lights for hours on end. There’s a huge battery connector and a solar connector but you can’t remove the power cable when using it on battery. Pair your WAVE 2 with an EcoFlow DELTA Max 2000, and you'll get an astonishing 14 hr run time in WAVE 2 Eco Mode. In fact, if we were to take that 9000 BTU amount, divide it by the 26 square metres of capacity it should have, and multiply that by our 14 metre bedroom size we arrive at 5040 BTUs.

It pulses on and off slowly, really lending a finishing touch to the very sci-fi robot parts design of the WAVE 2! This is useful if you’ve got a tent or garden office, as the air conditioning unit can be kept outside, where it’s quiet. What I will be doing is determining how well the WAVE 2 manages to reach and maintain a comfortable temperature in a 14 square metre (around 150 square feet) bedroom using both the inlet and outlet hoses to get that ideal, optimum efficiency, dual-hose setup. Fortunately I had three sheets of foam board spare, so I just stacked them across the window and it does an acceptable job of keeping out the sun. Well our 14 square metre bedroom is roughly three times that volume (roughly 32m3 if you’re counting but there are beds and wardrobes and stuff)- so we’re within striking distance of reasonable figures here.