Hohm Wrecker G2 Review – Can It Really Do TC with Kanthal?

Can the Hohm Wrecker G2 really do temperature control with Kanthal? We find out.

11
Hohm Wrecker G2
Hohm Wrecker G2

The Hohm Wrecker G2 Intro

Here we go with a review of the Hohm Wrecker G2, the mod that claims to perform temperature control with Kanthal, nichrome and just about any other wire type imaginable.  Does it live up to this bold claim?  Read on and we provide the answer.

As a taste of what’s to follow, our performance evaluation includes the “Thermocouple of Truth” —  real time thermocouple data from inside a functional atomizer to see what’s really going on.

As another quick side note, sure this mod has been on the market for a bit and lots of folks have already taken a look at it. But, Hohm Tech has recently released a firmware upgrade for the Hohm Wrecker G2 that enhances its performance.

Finally, I can say for sure the warning in the Hohm Wrecker G2 instruction manual is to be heeded: “This device is intended ONLY for advanced vapers.”

Discounts

Check out this product via the button below

*Some discounts are dependent on your geographical location.

The Hohm Wrecker G2 Specs and Features

  • With FSK chip technology, needs only (2) 20A+ 18650 batteries
  • Size: 4.13 x 2.28 x 0.94 in. (105 x 58 x 24 mm)
  • Thread Style: 510 connection with full-face push pin with high-tensile strength spring
  • Wattage Output: 10W – 151W (also in TC)
  • Voltage Output: FSK Intellichips automation
  • Temperature Range: 200 oF – 700oF (93 oC – 372 oC)
  • Ohm Resistance Range: 0.007Ω – 3Ω
  • Temp/Watt Increments:  .1-1 watts (WATTS MODE) : 10oF (TEMP MODE) :1 oC (TEMP MODE)
  • Coil/Wire Types: Ni, SS, Ti, NiCr, K, & all permutations

Notable Remarks

About HohmTech

HohmTech Team
HohmTech Team

Who are these Hohm Tech guys anyway?  Well, before we dive in the deep end of the performance evaluation itself, I want to give you a little bit of info about the company.

Hohm Tech is USA based and consists of the two founders, Benjamin Ramalho and Carter Li (pictured above), along with about a dozen other employees.  Hohm Tech also has collaborations with several large university department members in disciplines including engineering, computer science, mathematics and project management.

Ben and Carter started out working on specialty vape battery chemistries and they tell me they have successfully developed two proprietary batteries: the Hohm Life and the Hohm Work.  While the battery project was underway, they started on the Hohm Wrecker G2 FSK chip.

I’ve had the opportunity to communicate at length with Ben about the FSK technology, but of course most of the details remain proprietary.  I can say that Ben has been extremely generous with his time and assistance.  He definitely seems to be a real stand up guy who believes in his company and its products.

The Claim of the Mod

Hohm Wrecker G2
Hohm Wrecker G2

What exactly does this mod claim to do?  Well, it’s a dual 18650 TC mod that does very good temp control with Ni, Ti, SS and W (tungsten) wire.  It has a traditional configurable watt limit adjustment in TC mode as well as an innovative sort of cruise control “Auto+” mode that allows for three basic settings which the mod will use to adjust wattage based on battery charge level and condition.

But the world hardly needs yet another TC mod.  The big claim to fame for the Hohmwrecker G2 is its temp regulation abilities with any wire type – including Kanthal and nichrome.  To date, no other mod has really been able to successfully do that.  It is not claiming any form of “taste control” or a “learning mode” like the Asolo.  To quote Hohm Tech: “Measures Kanthal / Nichrome & ALL Metal Temps (RDA, tanks, & any atty’s temperatures can be measured & limited).”

Performance of the Hohm Wrecker G2

An evaluation of a mod with the claims of the Hohm Wrecker G2 has got to include the three objective elements of TC vaping: Ramp to Temp, Temperature Accuracy and Stability of Temp Regulation (RTS).

I don’t do cotton burn tests because I want to vape eliquid, not toast cotton.  I don’t really do a whole lot of dry hit testing because I’ve been vaping long enough to know when my atty is starting to run dry, and anyone using this product should be very experienced.  What I want for my vape is a fast ramp to temp, and accurate and stable temperature regulation.  Let’s see how the Hohm Wrecker G2 stacks up on that measure.

So let’s get right to it – does the Hohm Wrecker G2 actually regulate temperature with Kanthal?  It actually does.

To get it going I tried a number of different builds and really had to experiment a lot (a whole lot).  It’s not simple or easy in the build or the configuration of the mod.  For the build, what I found worked very well was a dripper (Mutation X was handy so that’s what I ended up using), 24 AWG Kanthal, 4.0 mm inside diameter, 9 wraps of each of the dual coils.

I also found that the Hohm Wrecker G2 will regulate temp well, but only when the three variables it works with are set correctly for the build: wattage limit, temperature setting and the FSK Temp Curve value.

I found I had to fiddle (and fiddle and fiddle some more) with those three variables until I was satisfied that it was actually regulating temperature and it was providing the vape that I wanted.  Once I had it set up correctly however, the results were amazing.

But don’t take my word for it.  Lets’ take a quick look at the “Thermocouple of Truth” profile of the Hohm Wrecker G2 successfully regulating temperature with Kanthal:

G2 Regulated
G2 Regulated

OK, what do we have here?  This is a chart of actual Kanthal coil temps inside the Mutation X atomizer for a vape with the Hohmwrecker G2.

The vertical or Y axis is actual temperature in degrees C (values along the left side).  The horizontal or X axis is time – 8.8 points are plotted each second.

The red line is the coil temp as it ramps up, hits temp, regulates and then cools after the fire button is released. (The flat green line is room temp.)

So what do we see?  I pressed the fire button at point 25.  The Hohm Wrecker G2 then ramps up to roughly 240 degrees C at about point 43 – so about two seconds for Ramp to Temp.  This is slow when compared to most other high end mods.

Next is Temperature Accuracy.  The “average’ of the regulated temp produced was about 245 degrees C or about 473 degrees F.  The Hohm Wrecker G2 was set to 450 degrees F so the variance was about 23 degrees.  This might seem like a lot but it’s Kanthal!

Finally the most amazing result of the bunch: Stability of Temp Regulation.  As mentioned earlier, it took a lot of experimenting and fussing but this thing actually will regulate on Kanthal with a stable result.  The points from 43 through 98 are the remainder of the vape with the temp staying right in a tight band around 245 degrees C.

I released the fire button right around point 98 and you can see the coil cool – typical exponential decay if you are into math.

To see how amazing this is, let’s take a look at an unregulated wattage mode vape at the same power level:

G2 Unregulated
G2 Unregulated

Now clearly this power setting was excessive for the build but it’s the same power setting I was using when in regulated mode on the Hohm Wrecker G2.  In unregulated wattage mode you can see the temperature of the coil zip up to over 300 degrees C and keep climbing, topping out at about 375 degrees C or 707 degrees F – yup, on fire.  So the Hohm Wrecker G2 Kanthal temp regulation does work, and surprisingly well.

The Interface

The Hohm Wrecker G2 interface is a handful.  The April 5, 2016 update did “tone down” some of the confusing language on the menu choices, which is a plus in my mind, but this is definitely a device for advanced users only.

To set it up to TC vape with Kanthal, you choose Kanthal as the wire type.  This then activates context sensitive choices in the Advanced Menu.  In the Advanced Menu, you then choose an FSK Temp Curve Value (from between 0% and 100%). You then choose manual wattage limit mode or Auto+ mode (I strongly recommend manual wattage limit mode, at least at first).

You then set your wattage limit and temperature limit.  Whew, are we done yet?  Nope.

Then, you need to adjust the interplay between these three variables and the vape you perceive.  Hohm Tech recommends slowly increasing the FSK Temp Curve value until you perceive the mod hitting the set temp.  This works well – provided that the wattage limit is reasonably within range of what the atty can handle and provided that you are OK with the temp setting being basically a guess based on your perception of the temp.

In sum, there are a lot of choices and permutations in the menus and you will spend a considerable amount of time adjusting them on the path to customizing your vape just the way you like it.  The reward: a vape pretty much just the way you like it.

Build Quality

Hohm Wrecker G2 Colors
Hohm Wrecker G2 Colors

Build quality is very good.  Some have criticized its shape as just a box, but it is a well made aluminum box.  It’s relatively big, but coincidentally the same size as a box of 100mm cigarettes which it will forever replace.  In other words, we former smokers are used to carrying something of about this size in our pockets so that shouldn’t really be an issue.

The finish appears to be anodized and has been durable, even at the corners.

The buttons are plastic but don’t rattle and provide good, “clicky” positive feedback.

Battery door is firmly held by its magnets with no rattle whosoever.

Likes

  • It does actually temperature regulate with Kanthal!
  • Good performance with “traditional” TC wires as well
  • Excellent Build Quality and Fit and Finish
  • Hohm Tech is a USA based company that is releasing Firmware Updates

Dislikes

  • Can be very complicated to use and get working properly
  • Slow Ramp to Temp, at least the way I needed to set mine to get it regulating well
  • Some don’t like the plain “box” shape but I don’t have any issues with that
  • Confusing, almost “silly” terms used for some of the menu options – this has been improved to some degree in the most recent firmware release

Verdict

If you have always wanted a TC mod but were a dye in the wool Kanthal or nichrome user, this might be the answer for you.  Be forewarned, however, that you also have to be willing to futz around with the settings and possibly your build to get it going just right.  For folks who enjoy tinkering and a challenge, this is the mod for you.

Epilogue

How does it do it?  The details remain proprietary but for all the deep dive tech heads reading this, post up your comments as to how you think the Hohm Wrecker G2 is actually doing it.  Get as crazy as you like – electron transit time in the wire measured by phase comparison of fast rise time pulses?  Propagation delay affected by temperature and measured by some sort of new feedback multiplication method?  A better and cheaper way of measuring infinitesimal resistance changes?  What do you think it’s doing?

Discounts

Check out this product via the button below

*Some discounts are dependent on your geographical location.
SHARE
Keith, a.k.a, Old Mad Scientist: I have been working in the electronic and computer engineering fields since the “dark ages” (starting in the mid 1970’s) and have been an avid ecig user and tinkerer since 2013. I've been testing vape equipment with an engineering “bent,” and enjoy testing and evaluating new vape equipment and new build techniques.
  • Bill Herbst

    Keith,

    Do you have any feeling or info about how the Home Wrecker system for all-wire temp control varies from iJoy’s “taste control” system?

    I’ve not been won over by temp control so far — Nickel is a wire type I’d rather not vape, I don’t use RDAs often (which seem to me the most likely candidates for the benefit of dry hit elimination), and the vape experience of many of my temp control mods seems slightly anemic to me.

    That said, I don’t have either of the “flagship” TC systems (DNA200 or high-end Yihi). My boxes are all either low-end Yihi or clone chips.

    I’ve been surprisingly pleased, however, with iJoy’s Taste Control system on the Solo Mini.

    I take it the Home Wrecker system is significantly different, yes?

    • Old Mad Scientist

      Hey Bill, thanks for the questions. I never had a chance to try an Asolo on the “Thermocouple of Truth” so I don’t have objective data on its performance. From what it is able to do, I theorize that it uses a rough measure of temp increase to evaluate a trend over time. When the rate of the rate of temp rise goes positive, the coil is dry (to get wonky, the second derivative of the temp change goes positve). By doing it that way, the Asolo never needs to know what the coil temp is, only that it varies, in a gross sense, from the learned “profile” or if it really starts to accelerate quickly from a dry coil.

      The G2 does appear to actually regulate the temp so it’s sort of the next step in Kanthal (or nichrome or just about any wire) vaping. I’m not aware of any other mod that’s presently able to do that.

      If a TC vape seems anemic, it could be an issue with the Ramp to Temp speed. A properly set up DNA 200 is the champ on that measure out of all the various mods I’ve evaluated. Depending on the build, an SX mini ML-Class can be right there with it. Of course, neither will temp regulate Kanthal so right now the Hohm Wrecker G2 is “it” for that.

      Bottom line, if the Asolo Mini is doing the job for you, it’s hard to recommend spending for the G2 unless you want another mod anyway. But given a choice between them, I’d pick the G2.

      • Bill Herbst

        Thanks, Keith. Your response is both thoughtful and very informative.

        Your explanation of slower ramp-to-temp time as the possible cause of my experiencing TC as “anemic” makes common sense. Although I have a stable of TC mods, I doubt that any of them could hold a candle to a DNA 200 or SX mini ML-Class. Just goes to show that you get what you pay for.

        Maybe I’ll pop for a DNA200 at some point, just to see what I’m missing.

        • Old Mad Scientist

          Thank you Bill. If you’re thinking about a new mod and you like the mini type form factor, a couple of things are in the pipeline that are likely worth having a look at.

          Evolv is already beta testing its DNA 75 — a single battery version of the DNA 200. Not sure of the release date but should be very soon.

          I just found out late last night that Hohm Tech will be making an announcement for a new product expected to be released in a few weeks. My understanding is it will be a single 26650 mod with top notch performance. I’ll have a “first look” ready on that one very shortly.

        • Zac David

          Bill, you may not have an issue dropping the money on a DNA200 but also bear in mind that there are a whole bunch of really solid, less-expensive devices around now that really do TC quite well, especially with custom TCR. I’m not sure they do TC as well as a DNA200.. but certainly well enough to get the idea of what you’re dealing with for <$50. I have a Cuboid, an iStick Pico, and an RX200 and I really love them all. I have a DNA200 too but with the TCR function on the Cuboid and RX (and pico) I find myself using them more often these days. Less fuss. Granted, I'm also not making graphs and checking accuracy. I just know I get a quality vape from any of them, which is all I care about 🙂

  • Jonathan Robinson

    Hi guys,

    Great review btw 🙂

    I’ve jus purchased one of these from Vaporcube in the good ol US of A and it has been sent. The problem is I’ve since done a search online as to how long it might take to get here and in the process found out there may be charges to be paid when it gets here. It already cost me 150 dollars (approx 110 great British pounds) so was wondering just how much more this may cost?!

    Any help pleeeaaase lol

    • Old Mad Scientist

      Hey Jonathan, I’m no expert on import taxes but it looks like you might be in luck. According to Pitney Bowes, you might be under the threshold for import duty. Take a look at this site: http://www.dutycalculator.com/country-guides/Import-duty-taxes-when-importing-into-the-United-Kingdom/

      Looks like you will still be subject to VAT and there might be additional local taxes — where are you located?

      Thanks!

      • Jonathan Robinson

        RM16 Essex

        • Old Mad Scientist

          Again, I’m no expert but I don’t see any additional tax charged in Grays. Looks like a 20% VAT though.

          • Jonathan Robinson

            Cool 🙂 135 quid for 150w TC on any wire 🙂 sweet 🙂

  • warid

    Hi guys
    I got my hom wrecker g2 3weeks ago. Not really into temp control but have tested on nikel wire and it does work with a bit of tinkering. The main reason i chose this mod as it does true watts and compare to my other mods and mech mods i can taste the difference. It was a flip between ohm wrecker g2 or dna 200 mod for me and i highly reccomend it for advance vapors.