We receive a quite a few inquiries via the "Contact Us" form. Here are some answers to the more frequently asked questions;

This is interesting, how can I become a member?
It's easy, simply follow the link on the left hand side of the page appropriate to the type of membership you would like, Corporate or General.

Is this a scam?
In short... No, it is a means of preventing them within our industry.

Then why do I have to pay to become a member?
Our membership dues are a way of generating a small amount of income to offset the day to day expenses of running and promoting an organization such as this.  Also, requiring our members to contribute a nominal fee generates a certain level of commitment amongst the membership base. It seems people are more apt to put effort into something in which they've already invested.

So where does your funding come from?
Funding? Yes please!!! We currently operate as a volunteer organization, none of this would have been possible without the great generosity of our membership base through donations of both money and time. If you have an idea for funding The IHHOI in a manner that would allow us to maintain our autonomy as well as our integrity as an objective standards body, we would love to This email address is being protected from spambots. You need JavaScript enabled to view it.

How can we contact you?
There's a "Contact Us" link on the main page of our website, this will allow you to join our low volume mailing list and submit a short question or comment. Alternatively, if you have more to say, you can send us an email at This email address is being protected from spambots. You need JavaScript enabled to view it. .

I'm from "X" country, do you accept members from here?
As our name implies, we are an international organization, & as such are happy to have members from all over the world. The more people spreading the new energy message in more places, the sooner we can begin to alleviate the global strain on resources.

I'm interested in developing a cell that makes "X" liters per minute, can you help me?
While we're not in the business of tech support, we will be publishing a series of ebooks that will explain the basics of HHO and potential methods of tuning a cell to a particular application. Check back here periodically for updates, or join our mailing list.

I bought "X" cell from "X" company, what should the output on this cell be?
We can only provide output statistics for cells that we have tested, & though theoretical predictions can be made by incorporating a number of design parameters, it would be intellectually dishonest for us to answer this type of question due to the sheer number of variables involved. The only way to be sure is to encourage the manufacturer to send their cell in for testing, the results of which will be posted on our website should the manufacturer grant consent.

I have a 19XX Make & Model vehicle which gets around 20 mpg, how big of a cell do I need to get above "X" mpg?
There are many factors that go into determining the final fuel efficiency increase with HHO systems. While the size of the cell and it's output do play an important role, other factors that must be taken into account include HHO delivery, installation, electronic compensation, engine timing, operating temperature & driving habits, just to name a few. With this volume of variables, it is difficult to say, with certainty, what the specific MPG increase will be for any given configuration.

I have a question...
Excellent! Curiosity is the gateway to knowledge. Ask away & we'll do what we can to answer it!

How often would you have to refill a cell installed on an "X" liter engine?
That depends, it depends on how big the water reservoir is that supplies the HHO cell. Most of the systems I have seen use 2-4 liter reservoirs. Though what really determines how often you refill is how much you drive—therefore how much HHO you consume, (the gas output is a factor as well, but let’s assume you have an average system that makes about .5-.75 liters of REAL HHO gas per minute). These average systems consume about 1-1.5 liters of water every 3000-3600 miles, so there’s your answer.

Some more advanced systems do offer an “Auto-Re-fill” option that incorporates a second larger reservoir to store the water, then refills the system when it gets low. This can decrease the refill requirement by 2-3 times, depending on the size of the tank. Many people are comfortable adding a little water once every month or so… Some choose to do it every oil change (3000-3600 miles).

I really like what you guys are doing here, can I help out?
If you have knowledge or expertise in any field related to HHO we would like to talk to you. We are looking for industry leaders to author articles to be featured on our website. If you have something to share for the benefit of the HHO community, we will gladly assist in getting the message out thereprovided it is not commercial in nature. We are also seeking new members to populate committees that will be charged with developing standards for other areas related to HHO, above & beyond Cell Output Testing & Certification. The first step would be joining as a member and beginning to attend our weekly conference calls.