Crompton Optimus Desert Air Cooler- 100L; with 18” Fan, Everlast Pump, Large & Easy Clean Ice Chamber, Humidity Control; White & Black

This is an excellent cooler if you have a well ventilated room and you live in an area with dry heat. I live in Delhi NCR and this cooler does fine till mid June (bcs after that you get humid heat and you will need an AC till Aug/early Sep). Here are a few pros and cons :

Pros:

1) Three sides of the cooler (with pads) have meshnet/filternet which really comes in handy to stop mosquitos entering the cooler from sides and it even stops a lot of dust. You just need to wash the filternet weekly or once in 2 weeks which is really easy to do with a jet spray (health faucet). This is the best feature of this cooler because unlike my other Crompton Cooler (Ozone which doesn’t come with meshnet), this one carries on with cleaner pads throughout the whole season.

2) This cooler has the largest ice chamber that I know of and the best thing is that the whole water flows through the chamber before falling on pads which means putting some ICE in chamber will do the magic straight away

3) It has a 3 pin plug which is very common but somehow missing in Symphony coolers so I marked it as a pro

4) Easy Drain function rocks, it works really well and helps drain at least 95% of water while I get rest of it out by tilting the cooler sideways. There is also a rubbery drain plug at the bottom to fully drain the cooler but I don’t use it because it loosens in few years and then cooler starts leaking (happend to me with Symphony Sumo model in past)

5) Fully collapsible louvers are fantastic and help protect the cooler from front in off seasons

6) Auto water inlet is also available if you have a tap nearby to keep it turned on at all times, do check out the pipe attachment (comes with the cooler) before using it

7) Good quality castor wheels with 2 front ones having stopers

8) Everlast Pump is really easy to clean

9) Quality of honeycomb pads is really good and water is evenly distributed on pads, rentention is good too so you don’t get occasional incident of cooler spitting water (like it happens with wood wool pads)

10) The cooler has great quality plastic and it is built like a tank

Here are some cons :

1) Putting the L shaped drain pipe in drain hole for the first time was very difficult. I really had to peel off some plastic from the inner hole to fit the pipe and push it through with force, it seemed like a risky thing to do. Crompton should check the size of drain hole before marking the unit as “tested ok”

2) The cooler lacks a front opening to fill water which is really poor from Crompton bcs they provide it in all their models. Yes there is an auto water inlet and a manual one as well at the back but not every pipe would fit those. I put my water pipe through the large grills (louvers) at the front to fill it but since they are delicate, I have to be careful
Edit : I have started filling this cooler with the pipe from the sides (after sliding the side pad meshnet slightly up and putting the pipe in the gap that opens, you can push it down with slight force). It is the easiest way to fill the cooler

3) Like most plastic coolers out there, opening this cooler is a challenge with combination of screws and plastic latches which are pointy at times, be careful while doing it (especially the first time) bcs you may damage your fingers, thats why I love the fact that it has meshnets which means I only have to open the back cover to clean the bottom and not all the pads bcs they aren’t that dirty after every season.

4) Honeycomb pads can be smelly initially like they are with every cooler out there, fill your cooler, put it in your balcony or an open area, let the pads get wet by running pump for a while and turn on the fan. Do this for an hour and then drain the water and fill the fresh water again. Repeat this process for 2-3 times and smell will go away in 2 days or earlier

All in all, an excellent cooler which does its job well. If you have the right expectations and willing to keep it well maintained with annual cleaing of its pads if needed (and changing them after every 3-4 yrs), it should serve you for years.

Cooling 💯
100 litre tank is more than sufficient. Easily cools a large area plus water lasts more than a day easily. Pump is strong and honeycombs are super quality which gives cool feeling even in the 48°C heat in my city. Never got such quick and good cooling from any coolers I’ve used so far.
Air throw is good, covers large area of my room noise is least, which is very big plus point.

Ease of use 💯
Easy to clean, easy to drain than all previous coolers I’ve used. The “drain” nob and outlet provided at the back does it’s job without having to open the cooler.
The completely shutting off louvers help keep the cooler clean while not in use.
Wheels are provided in the box.
There’re lot of options to fill water but the “inlet” given at back is best. Use pipe. Don’t fill water from ice chamber.

There’re pump options given at back panel for summer or humidity. Keep on “high” during summer and “low” during rain/humidity. This option is very helpful.

After sales💯
Initially i faced some issues as i didn’t properly understand some settings, so had to contact Crompton service. It was very easy to contact and they sent an expert within hours of calling and provided service free of charge. So very pleased with after sales service by Crompton.

Overall best cooler I’ve purchased so far after trying both generic and reputed companies coolers.

Very good cooling even in such extreme heat. Perfect for a small family. Least noisy, easy to clean and fill water. Highly recommended. Full Paisa Vasool!