Mr. Owl RDA by Ehpro – Nice Looking Kit But A Good Performer?

Introducing the Mr. Owl RDA (Rebuildable Dripping Atomizer) by Ehpro. Shenzhen Ehpro Technology Co. Ltd is a Chinese company which specializes in electronic cigarettes, while they do produce a wide variety of clones based on products from other manufacturers they are also heavily focused on producing their own products.

The Mr. Owl RDA is a completely original and authentic design.

EHPRO Mr Owl RDA Review

Mr. Owl RDA Features:

  • Original design.
  • A total of nine air holes in three sets of three.
  • Six circular air holes are 1.5mm diameter
  • Three air holes are rectangular with a width of 3mm and a diameter of 1.5mm.
  • Supports single and dual coil builds.
  • PEEK Insulator
  • Three post design
  • Stainless Steel Construction
  • Top and bottom heat sinks.
  • 49.1mm tall
  • 22mm diameter
  • Copper 510 pin

The Mr. Owl RDA box contains:

  • 1x Mr. Owl RDA
  • 1x wide bore delrin drip tip
  • 1x stainless steel drip tip
  • 1x 510 drip tip adapter
  • Spare O-rings
  • Spare screws
  • 1x small blue screwdriver
  • 2x pre made coils
  • 1 bag of Japanese cotton

The packaging is decent enough being a black cardboard box with a thick foam inlay. The included extras are very good value. The pre made coils are actually very neat and well made but I didn’t use them.

The Mr. Owl RDA is Quite a Decent Looking RDA But Has a Few Minor Annoyances:

On the whole I can’t fault the machining. I do however take issue with the screws which I don’t feel are that good.

They were very stiff to initially unscrew and when building this RDA it seemed they required quite a bit of force to be applied when trapping the coil wire, I also felt that they weren’t actually threading that well either and had a bit of a habit of loosening if not heavily tightened.

However they don’t appear to be sharp and I had no issues with the wire ever being cut.

Mr Owl RDA Deck

The post holes are large enough. I had no problem fitting a single 26 AWG (0.4mm) twisted coil in there and its quite likely I could have got a dual coil twisted build in there but I suspect it would be a very tight fit.

The O-rings hold the top cap very securely perhaps a little too securely since it does require a bit of a pull to get it off. Certainly its nowhere near as awkward as the Veritas RDA which remains to this day one of the most difficult top caps to ever remove when brand new. It is a very good fit though when putting it back on and you can hear it click into place properly.

One issue for me is the raised wall around the well which is open in two places to allow the air to get at your coils, the problem is that it gets in the way of you actually fitting your coils. It isn’t that bad but it makes things that little bit awkward.MR Owl RDA Parts

The juice well is suitably deep and holds a reasonable amount of liquid.

Another issue for me is the wide bore drip tip which you press fit to the top cap, once again this requires a little more effort than is typical and its quite a tight fit. The 510 adapter is exactly the same but in the case of removing it from the top cap I found I had to push it out with a screwdriver from underneath and that also required some force. Fitting the stainless steel drip tip to the adapter and its another case of tight fitting deja vu. Over time I suspect they will become easier to fit and remove but when brand new they are a little annoying.

One thing I really don’t like about the design of this RDA is that the coils have to be positioned at 45 degree angles to each other. In the case of most RDA’s these days they are central and opposite.

Add in the fact that the well wall gets in the way of your build and its not the best design on offer. It is very much like the old Tobh Atty RDA in some respects which often forced the wicking to one side of the well and juice flow could become stifled as a result.

The raised well wall is also irritating when cutting the tails of your coils because it constantly gets in the way.


I actually do like the aesthetics of the overall design and the logo is rather nice, being a stylised owl face. The wide bore drip tip is actually rather different and unlike other RDA’s which often have a wide tube the Mr. Owl one is more of a funnel in that it widens at the top. In some respects it looks a little like a black loud hailer on top of the RDA.

This RDA was completely free of machine oil but I washed it anyway as I do with all new RDA’s and RTA’s etc.

How does the Mr. Owl RDA perform?

For my first build I made a single 26 AWG twisted (0.4mm) coil with a final resistance of 0.8 ohm which I then wicked with Japanese cotton. Flavour was more than acceptable and with the wide bore drip tip I was certainly getting plenty of clouds. Being a rather thick coil with a lot of surface area I really did ramp up the wattage with this one and took it up to 85 watts which was of course a very hot vape, flavour was average, perhaps slightly better than some other RDA’s.

Ehpro Mr owl On SMOK M80 Plus

Vapour production was very good but of course not in the same league as say a Twisted Messes or Mutation X V4 RDA. The vapour production is good enough for most people but not enough for extreme cloud chasers.

When I came to fit a dual coil build I used 26 AWG (0.4mm) and my final resistance was 0.5 ohm. With a dual coil, flavour is certainly improved and adjusting the airflow to suit helps to improve the flavour somewhat, although I still don’t find it particularly exceptional.

Vapour production was also increased but does not produce as much as other RDA’s that focus specifically on cloud chasing.

I would say that Halo Vapour Co Classic Virginia tasted fairly nice in it but came across as a little harsh and not as nicely blended compared to when vaped in many of my other RDA’s. Twelve Monkeys Mangebys was very flavoursome due to being quite a potent juice but it wasn’t entirely perfect when vaped in the Mr. Owl, it was definitely not as crisp as I would like.

This isn’t an overly leaky RDA, obviously it will leak if you over fill and it is not designed to be carried around as a leak free solution like a Veritas or Aeolus RDA.

Is the Mr. Owl RDA worth it?

This is a very straightforward RDA that doesn’t really excel in any notable area. Certainly if you need another standard three post dripper then perhaps it is worth it.

Apart from the fact that it is quite aesthetically pleasing I don’t see anything special about it that would really tempt me as a customer.

I’m not saying its bad or anything but personally it wouldn’t be ideal for me. Due to some minor flaws in the overall design I wouldn’t say it was very user friendly for a RDA novice either.

Final Thoughts:

The Mr. Owl is a reasonable RDA that comes with some decent spares. In many respects it is distinctly average and there are other RDA’s that will likely appeal more to users.

It is well machined but has rather a few quirks and annoyances that will irritate some people. It’s not what you would call bad in any way but I feel personally for the money you could certainly do better.

The Good:

  • Quite a nice looking design
  • Reasonable flavour
  • Good vapour especially with the wide bore drip tip
  • Lots of extras
  • On the whole well machined
  • I like the logo

The Not So Good:

  • Drip tips and 510 adapter are a very stiff fit
  • Top cap requires a little effort to pull off
  • Well wall is annoying and gets in the way
  • Screws aren’t great
Build Quality
Chances of Buying a Replacement if Lost
I have been vaping for four years now. I was a 20 a day smoker and a friend of mine encouraged me to give vaping a try. He gifted me with a ego/ce4 set up and some juice and to be fair I found it reasonable but not ideal so I was still also smoking. I went to my local B&M and got some good advice regarding what vaping gear would suit me, as well as finding some juice more to my liking. For a couple of months I used a Vamo V5 but I kept seeing these shiny tube mods and I wondered what they were. After some investigation I discovered they were called mechanical mods and I had to buy my own. From that point I was completely off the cigarettes and quite satisfied with my set up. I eventually moved on the rebuildable devices with my first RDA and RTA. I love vaping and I have no plans to ever stop because there are so many new flavours to discover and a vast amount of different devices with newer technologies to try. While I still own a couple of mechanical mods my preference these days is VW box mods and I really do enjoy a vape with temperature control. I also make my own e-juice as time allows.


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