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DIY HVAC

An anonymous reader writes "I found this very interesting project called DIY Zoning. It allows one to add air flow balancing, temperature control, zoning, home automation, and more to an existing or new HVAC system. After getting a $200 electric bill, this sounds like a good solution for those who are getting screwed with outrageously high electric bills due to their HVAC unit especially since organizations like TVA have raised the electric rates."

19 of 315 comments (clear)

  1. This king of thing... by ciroknight · · Score: 4, Insightful

    Is going on a lot here where I live. Berea College has completely rebuilt many of their buildings to make them more environmentally friendly, and to cut down on their "outrageous energy costs". Not to mention that Berea College owns all the utilities here anyways.

    I really don't get why this kind of project is really worthy of doing anyways. May save some money, but most people's houses dont use more than 1500 kWa of electricity a month... ~140$ of electricty around here (considering we pay the "Berea College Utilities" tax). Now a worthy project would be covering your house with solar panels and breaking even on your utility bills ;).

    --
    "Victory means exit strategy, and it's important for the President to explain to us what the exit strategy is." G.W.Bush
    1. Re:This king of thing... by canavan · · Score: 3, Insightful

      Photovoltaic panels are NOT (yet?) environmentally friendly, as their production is a very messy and energy consuming process.

      Your argument about Berea owning the utilities seems flawed, unless of course they are operating their own oil wells or hydroelectric plants or whatever, in which case they could still sell the excess energy they are not wasting due to the rebuild.

  2. Here's some solutions to help lower the bill: by Rinikusu · · Score: 4, Insightful

    It's quite simple, really.

    Learn to do without.

    I know it sounds contrite, but hear me out.

    Do you really need both of those monitors? If not, chuck one, or turn it off. Monitors draw quite a bit of power. Also, make sure you turn off your monitors when you're not using them, or make sure their power saving modes are on. Alternatively, you could go LCD to help reduce the costs, but I've always looked at that with some suspicion in that the prohibitive costs related to 19" and higher LCD's offset the potential savings.

    How many computers are you running? If the answer is more than one, ask yourself if you really *need* to be running the others. Sure it's nice that you've gotten that old P233 up and running as your firewall, but frankly, a Linksys dedicated router/firewall is going to draw much less power, with fewer moving parts.

    Air Conditioning: Learn to live a bit warmer. Learn to open windows instead of reaching for the thermostat. You'll find that your body can and will adjust to warmer temperatures if you let it. I live in the South with oppressive humidity and heat during the summer and my dad tells me stories of him growing up when they didn't have A/C. It can be done. And, if you follow the first 2 items above, you'll find your house isn't as hot. Computers + Monitors == lots of heat. Now, in my apartment, I don't have central A/C, only a couple window units, unfortunately. A trick I've learned is to shut the door to my bedroom, which happens to be decently sized, and only run the A/C in that room. It gets downright cold pretty fast. Now, it does make me somewhat of a prisoner in that room, only venturing out to use the can or to cook something in the kitchen, but I've learned to cope. Besides, I can grab my laptop and browse the web wirelessly from anywhere in my house. Also, at least here, the hottest part of the summers is only one or 2 months that you have to "suffer" through. Actually, if you work a lot, here's an excuse to work some OT. :)

    My bill dropped from $150/month to less than $50/month once I adopted these measures.

    If you're married with kids, feel free to ignore because I'm assuming most of the /. readership are bachelor males. Of course, a fantasy alternative would be to get a girlfriend with her own place and just crash over there.

    --
    If you were me, you'd be good lookin'. - six string samurai
    1. Re:Here's some solutions to help lower the bill: by drinkypoo · · Score: 2, Insightful
      Here's another one. Air Conditioners: Get a f'n swamp cooler and use that instead. Keep the AC around for when the swamp cooler has failed. If you put a cover on it, it will keep for a long time. The swamp cooler does nothing but pump a little water (a trivial amount of electricity) and blow a lot of air (a few amps for a really big one to cool a good sized house, say four bedrooms, but less than running an AC compressor and fan.) They blow a lot of cool air, and on really hot days they may drop the temperature 20 degrees. For larger loads you can add a cooling tower which is supposed to do quite a bit.

      The one problem with swamp coolers is, they don't work in the places with the highest humidity, which is even hard on an AC system, which has to remove that water to efficiently remove the heat. So if you live in Florida, it's not going to help you.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  3. Programmable Thermostat? by Tablespork · · Score: 2, Insightful

    So this is essentially a programmable thermostat for your PC with some more advancded features like zones, right? Or am I missing something?

  4. Open sourcing everything by nmoog · · Score: 3, Insightful

    The HVAC community is definitely different from Open Source community, and whenever they get close, it gets quite hot

    Doesn't seem that hot - fun reading I'd say! The idea is great though (not new, but great) - As open source branches in to more and more area, the people involved with open source software are more likely to adapt OSS principles to non-software aspects of their work.

    "An open-source future is one in which we realize that reality itself is open source" to quote an unknown guy on the internet. Hope it happens this year!

  5. Open Source Energy Initiatives by Snoobs · · Score: 3, Insightful

    I think the idea of open source energy solutions is a great idea. Right now, we have NO choice of who we buy our electricity from. The situation with electricity and fuel is 20X worse than Microsoft's control of the computer industry. What happens when petroleum gets too expensive and runs out?

    Its time to do something about it.

  6. Two concerns: Resale and housing code by swb · · Score: 4, Insightful

    While there's no good reason I can think of that retrofitted zoning would be a zoning problem, sometimes what's permissable and what's not isn't always self-evident.

    It would royally suck to need something inspected later on, such as when selling a house, only to be told it wasn't code and had to come out or be expensively upgraded to meet code. I've done a ton of electrical work (some in conjunction with remodeling which was heavily inspected) and nobody said boo, but it was all code-compliant.

    And speaking of resale, even though a zoned hvac system would be nice, one that's more complicated than your grandma can operate will actually lower your resale value to most people since it will be seen as a maintenance liability. I put in a Honeywell 7 day programmable thermostat and my wife hated me for a couple of months until she figured out how to work it. I can only imagine what she would do with something that made one room cold and another warm without being totally obvious (like a 15" LCD touch screen with a floor plan of the house and car-type heat controls).

  7. Yes you do by nuggz · · Score: 2, Insightful

    Actually I think you do have choice.

    Here you can buy from the government regulated electrical power grid. Or you can generate your own electricity. Solar cells, gas generators, waterfalls or whatever you want.
    But there is a reason most people don't do this, the utility price is easy, cost competative and reliable.

    I think rates aren't all that high, most people waste huge amounts of electricity. I read somewhere the average household in my area uses 750kWh/month, I just just over 300 kWh.

  8. yeah, but a kernel panic would be a bitch.... by chrisopherpace · · Score: 3, Insightful

    Sounds like a pretty cool idea, and cheap. From reading the site, its definetely cheap. Somewhere around $20/room for tempature controls/etc. I just don't like the idea of it being computer-controlled, in areas like where I live, it would suck if the controller crashed, and it was -40 out. Frozen pipes/kitty cats.

  9. -1, Troll by Gothmolly · · Score: 2, Insightful

    This whole submission is a sensationalist troll. "this sounds like a good solution for those who are getting screwed with outrageously high electric bills due to their HVAC unit". According to the article rates went up 7.4%, hardly a 'screwing'. Thus, if your bill was $200, that means it was $186.74 before, which means your "HVAC unit" (the definition left as an exercise to the reader) is pretty much shit anyway.
    How does this stuff make the front page, is the editorial staff of Slashdot the Socialist Worker's Party or something?

    --
    I want to delete my account but Slashdot doesn't allow it.
  10. Re:A nerdy approach that certainly outweighs mine by WindBourne · · Score: 2, Insightful

    Well, it is a matter of what you get use to. I grew up in Southern Wisc/Northern Ill. During the 70's, we had times for several weeks, the temp never got above -20F (I remember one week, where the temp never got above -35F). I did not mind it one iota. Later, I would run around with a windbreaker when the outside temp was 20F.

    Then I moved to Colorado in 1979. After being here for 2 years, I went back for a middle of winter visit with an ex-girlfriend. I dicided to walk up the road to where she was working, after all I grew up with -38F, still had the same clothes, and it was only a 20 Minute walk. Well, I almost lost my ears for that little stunt (yes, they turned black due to severe frostbight and the docs waited for 1 week before deciding that they did not have to go).

    That showed that anybody can get use to anything if they are exposed and acclaimate to it slowly. Several seasons will help. Personally though, I would turn on the heat. You will find it easier to deal with others.

    --
    I prefer the "u" in honour as it seems to be missing these days.
  11. Re:(Godfather Voice) Don't forget about the family by vthome · · Score: 2, Insightful

    Time, time, time. DIY Zoning is modular, and in the very beginning I hoped that TINI (that runs native Java) will be able to host one of the modules. Alas, never had time nor chance to get my hands on it. Still, thinking about rewriting the project in C++, after all the architectural things are done.

  12. Re:(Godfather Voice) Don't forget about the family by jrockway · · Score: 2, Insightful

    Java can be compiled to native code. Why would you rewrite something just to change the language!?

    --
    My other car is first.
  13. Re:Looking in all the wrong places by vthome · · Score: 2, Insightful

    Beg to differ - I did look into those places, all three of them.

    SmartHome - X10? A device with unreliable delivery? One network failure, and Boom-Puff up goes in smoke your expensive equipment. Thank you.

    And the others - well, they may have not existed at the time the project was started - that was about three years ago.

    As for your warning - yes, that's right. If you read the articles on the site, you'll find that this exact warning is written in bold face all over. Too bad. Go read the history of the project, and you'll see how they treated me back then :)

  14. Re:Gray Water Toilet - pictures and info! by BigBlockMopar · · Score: 2, Insightful

    Fuck you. My stuff, my rules. Who lets shit like building codes fuck our society?

    Well, yeah. I'm quite a Libertarian, but unfortunately this is just one of those things where there have to be government-enforced standards. (You're certainly not going to trust contractors to do the right thing, are you?)

    Why are building codes important? Look at fire and earthquake damage in third-world countries like Taiwan and Iran... 300 people die in department store fire in Taipei... Notice that sort of stuff doesn't happen in the US, Canada, EU or Australia very often?

    --
    Fire and Meat. Yummy.
  15. Re:What about water conservation?? by SiliconJesus101 · · Score: 3, Insightful
    "His point was in a normal toilet the tank water is potable"

    Hehehe, well, those funny blue discs in my tank tank beg to differ with you.

    I guess his point may have been a valid one for potable water, although, I would probably opt for bottled water from the local store.

    --

    "The strong will do what they want, the weak will do what they must."
    -Thucydides

  16. Re:Two concerns: Resale and housing code by Anonymous Coward · · Score: 1, Insightful

    Two very good points.

    That's why, ideally, I'd like to see a commercial product designed to retrofit a home HVAC system to be zoned, and I'd like to see the following features:

    1. Fallback mode, where there is a simple, battery-powered central controller that can operate it like a plain vanilla system if something goes wrong with the rest of the system. Sort of like the human heart and respiratory system: the higher brain can take manual control when necessary, but there is an "animal brain" that takes over if need be.
    2. Controller units in each room with no readout and just two buttons: the "it's too hot" button and the "it's too cold" button. EVERYTHING is controlled by these buttons. The system has AI to correlate preferences with the time of day, day of the week, etc. There is no need to set things according to a schedule with some crappy membrane keyboard designed-by-a-monkey user interface. You just press the buttons when you feel uncomfortable, and it learns the rest. It learns that some rooms are not occupied at certain times, that some rooms' temperatures drift downward faster (in the winter) than others, and that some people (person in bedroom #1 vs. the person in bedroom #2) like it hotter or cooler. Additionally, there is a sort of constant energy-saving "pressure" to the settings. In the summer, it never keeps it too cool and relies on you to occasionally (once every couple of days maybe) hit the "it's too hot" button to confirm that you still need the cooling effect that it is providing. If you don't, it will gradually raise the temperatue (by perhaps 0.5 or 1 degree Fahrenheit per day), or at least the temperature for that zone at that time of the day and week.
    3. A knob that controls how energy-efficient you want to be. Basically, this would control the level of responsiveness to the "too hot" and "too cold" buttons. Set it to "miserly", and the system more aggresively adjusts the temperature, requiring you to hit the discomfort buttons more often. Set it to comfy, and it keeps the temps about the same.
    4. Final feature: a temporary override or "snooze button". Let's say I'm normally happy having it at 77F during the summer, but it's 3:00pm and I am having a big, big group of people over at 5:00pm. I should be able to tell it to start chilling down the house in advance.

    Basically, everything but the last one is a simplification of the user interface. You don't really necessarily care what temperature your house is (in most cases), you just care if you're comfortable or not and what compromise you are making between being comfortable and saving energy. If you can just adjust both those things, then you get everything you need and the system is easier to operate than a normal system, and not really much harder to maintain.

  17. Re:Zoning rocks by instarx · · Score: 2, Insightful

    ...and electric was way too ineffecient to heat this house

    Electric resistance heating is 100% efficient. What you really should say is the cost of electricity in your area makes electric heating too expensive.