Coming Soon to Southern California: Rolling Blackouts

Every summer has its own story. For residents of Southern California, this summer’s story is going to include a chapter about rolling blackouts. The L.A. Times wrote the prequel earlier this month. To summarize, the natural gas leak this winter at the Aliso Canyon Underground Storage Facility has left Southern California short on natural gas, which means that, come summer, the region’s utilities could be unable to generate enough electricity to meet demand. To prevent the entire grid from, power managers will institute rolling blackouts by cutting electricity to certain individual sectors of the grid at moments of peak demand.

To many, the possibility of a blackout seems quaint. Who doesn’t enjoy the occasional candlelit dinner? And what parent doesn’t wish their kids would watch less television? The reality of blackouts, however, is deadly serious. Electricity provides us with more than just entertainment. We depend on it to, among other things, refrigerate our food, power hospital equipment, and illuminate traffic signals. We hardly notice it when it’s there, but without electricity are lives are much less safe.

Anatomy of a Blackout

Nice lights... be a shame if they went dark.
Nice lights… it’d be a shame if they went dark.

A lot of us might have a hard time conceptualizing how a natural gas leak in October can lead to a blackout the next July. The specifics of how we’ve arrived at our present situation underscore its gravity, however, so they’re important to understand.

The first step is to understand that demand for electricity does not remain constant throughout the day. Instead, it ebbs and flows like a tide. Demand is greatest in the summer, when air conditioners are in use (while homes can be heated using electricity, most use gas as it is more efficient). Day to day, we use the least electricity in the middle of the night, when we’re asleep and do not require lighting or the use of appliances. As we wake up and begin to turn on lights and appliances we begin to use more. Demand peaks in the afternoon and early evening, when air conditioners are working hardest.

To accommodate cyclical demand, electrical utilities draw from a variety of generation sources. Base load power plants operate near-continuously to provide the amount of electricity that is constantly in demand. These plants—usually coal or nuclear—are expensive and time-consuming to start up and shut down, but cheap to operate once in a steady state. The next tier of power plants—load following (or “mid-merit”) plants—strike a balance between start-up and operating costs, and thus increase and decrease their output cyclically to “follow” demand. In the western U.S., hydroelectric dams provide the ideal source of mid-merit electricity, which is why there are tides on the Grand Canyon stretch of the Colorado River.

The final tier of power generation are “peaker” plants that only operate at times of peak demand. These plants can start up and begin providing electricity very fast and at little cost, but only because they burn more expensive fuels than base load or mid-merit plants. In the United States, peaker plants are almost always fueled by natural gas. This fact, that peaker plants burn natural gas, is the connection between a fuel leak in October and blackouts in July.

We established above that peak demand for electricity occurs during the summer months and is driven by the use of air conditioning. Unfortunately, the electricity that allows millions of businesses and homeowners to simultaneously turn on their air conditioners is provided by natural gas-fueled peaker plants. Thus, when there is a shortage of natural gas, there is a shortage of electricity at peak demand, which causes blackouts. That they occur when demand is greatest is what makes blackouts so dangerous. Consider this: peak demand occurs from the afternoon into early evening. Rush hour occurs at the same time, and would certainly be a bad time for traffic signals to go out.

Or, consider the driver of peak demand, air conditioning. While it certainly makes life less sweaty, for healthy adults A/C is arguably much more a pleasantry than a necessity. Healthy adults can easily survive even record-breaking temperatures with only a little lifestyle adaptation. But not all of us are healthy adults. Some of us are children, some of us are elderly, some of us are sick. For these groups, exposure to environmental extremes (such as in a heat wave) can be fatal. If you don’t think heat can kill, think again: More than 70,000 lives were lost in the 2003 European heat wave. Closer to home, 739 people died in only three days during the July 1995 heat wave in Chicago, Illinois. We strongly recommend this haunting account.

We’ve said it before, and we’ll say it again, climate change is real and the world is getting hotter. Each of the past six months has been the hottest on record. If this trend continues—and it will—this summer will be the hottest ever, and by a wide margin. Extreme heat and electrical shortages are a potentially deadly combination, and are, scarily, quite likely in Southern California this summer.

We Want You
…with an AirScape Whole House Fan!

How Whole House Fans Help

You may be wondering at this point, “what does any of this have to with whole house fans?” A lot! Since air conditioning is the primary driver of peak electrical demand, reducing its use is the most effective way to reduce peak demand and, by extension, the probability of blackouts. Simply turning off the air conditioning doesn’t help much though, because the outdoor temperature remains high. After all, we’re sure you’d still like to stay cool.

A whole house fan is one of the only ways to cool a home without air conditioning. Moreover, they do so much more efficiently. In fact, AirScape’s “e-series” line of whole house fans can cool even the largest homes using only a tenth of the electricity of A/C.

If you live in Southern California, installing a whole house fan, and using it in place of A/C as often as possible, is one of the best ways you can do your part to prevent blackouts this summer. You don’t even have to take our (admittedly biased) word for it: If you are one of their ratepayers, the Los Angeles Dept. of Water and Power offers a $200 rebate for installing a whole house fan. They do so because these devices work to reduce demand for electricity. And with such a generous rebate, we’re sure you’ll find a whole house fan pays for itself very quickly.

If you’d like to learn more about AirScape whole house fans, visit our website. You can also talk with any of our friendly, well-trained sale techs in person on the phone. We’re available anytime between 9:00 am and 5:00pm pacific time, Monday through Friday, at 1.866.448.4187. We’d love to help you find the right fan for your home, so you can start conserving electricity and saving money as soon as possible.

Designing the 5.0e

5.0e, Front
5.0e, Front

Our newest model of whole house fan, the 5.0e, is has been available on our website since spring. We’re extremely excited about it. Not only is this our first new fan in several years, but it is also our most powerful and our most efficient fan ever. Moreover, we’re manufacturing a greater portion of this fan “in-house” at our Medford, Oregon facility than any of our other fans. We’re also seeking a patent for some of the innovations behind its performance. As our patent is finally “pending”, we can now share the story of the 5.0e’s development.

Read more

Now Introducing… Solar-powered Whole House Fans!

Not really. The headline above is a little tongue-in-cheek. Readers of this blog will know our fans are designed to be run at night, when cool outdoor temperatures can be drawn indoors. Since photovoltaic cells can’t generate electricity at night, directly powering a whole house fan with solar generated electricity isn’t possible—unless, of course, one wants to run their fan during the day, which would heat the home rather than cool it!

We do, however, frequently receive calls from homeowners wanting to know if they can run a whole house fan directly off of their home solar array. We wish they could. Because they’re a more efficient substitute for mechanical air conditioning, whole house fans greatly compliment solar by reducing the size of array needed to provide the same cooling. But again, photovoltaics don’t work at night.

To operate a whole house fan with electricity generated by a solar array, homeowners need some sort of energy storage device that would allow them to store electricity they generate but do not use during the day. Then, this stored electricity could be drawn down through the night to power the whole house fan.

In short, they need a battery—which is why we’ve followed Tesla’s recent announcement of their new Powerwall home battery system with great interest. Home battery systems have been available for some time now. But they have never been as prominent in the popular discourse as they are now, makings this the ideal moment for a blog post “back of the envelope” analysis about using a home battery to operate an AirScape fan.

Read more

XR High Insulation Model Whole House Fans

Starting in July 2014 we are offering R-49 insulation on our AirScape line whole house fans (R-47 on the 1.7 WHF).  These will be separate part numbers (-XR designation) from our standard units.  R-49/R-47 insulation will not be available on Kohilo fans.

How do we get R-49 into the doors?  A combination of standard fiberglass insulation and VIP panel (vacuum insulation panel) technology. VIP is a relatively new technology that offers an R–Value (thermal resistance) up to ten times greater than commonly used forms of insulation, such as Styrofoam and six times greater than polyurethane. The chart below gives us a visual comparison of VIP panel R values vs. other common insulation on a per inch thickness basis. (image courtesy of ThermoCor)


Why not R-49 on Kohilo fans? VIP insulation is relatively heavy and necessitates mechanical actuators to open and close these insulated doors.  Gravity dampers used on Kohilos, and a few other fan manufacturers, are not able to handle the added weight of insulation.

If you would like to read more on VIPs, check out the manufacturer’s website:

Responsible Manufacturing

Carbon Dioxide emissions are in the news again as we experience more violent weather in 2014 and a drought in the west.

We know our customers care about reducing energy consumption and the corresponding Carbon emission reduction.  So when time came to upgrade our production machinery and assembly lines we made sure we choose equipment that has the lowest energy footprint possible.  For example our high speed CNC punch is an AC servo motor driven turret which uses less than half the energy of a typical hydraulic machine and a 1/3 of the energy use of a machine of 15 years ago.

In addition, we made the conscious choice to supply the energy required to produce our whole house fans from renewable sources. Today, our on-site Solar PV array provides all the energy required to power our cutting and punching equipment as well as a significant portion of our assembly line.


Did you know an AirScape whole house fan could be your best energy savings investment?  Read on:

Winter Fan Use

Over the past few years we have received a lot of feedback from customers regarding the performance and energy efficiency of our fans during the hot summer months. The only thing lacking is how to use the fan year round. To assist with this we offer the SI (seasonal insulation) kit to help increase the R value of our unit. Lately we have been exploring the idea of getting some use from the fan during the winter. The concept of moving outside temperature air through your home doesn’t have to be limited to cool summer nights. The same technology that can cool your home can also be used to bring heat into your home. Some climates can become warm enough during the day to allow for the air to be brought inside and ultimately warm the house. Using the unit the same way you would at night for cooling during summer, in winter, the unit can be turned on when the temperature outside the home gets at or above the desired temperature inside the home. Creating these air exchanges during the day will help in warming the insulation, foundation, etc. which would otherwise have to be heated by your existing heating system. We want you to get the most out of your Airscape fan, and tips like these really help save money during this time of the year.

For further questions please contact Jeremy Batham, Airscape Technical Support 866-448-4187