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Joined 17 days ago
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Cake day: February 14th, 2025

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  • The RO system is dependent on the membrane. Theres a level of standardization for membranes and pre-filters. This is an example: https://www.freshwatersystems.com/products/axeon-5-stage-ro-system-50-75-gpd Conversely, there’s a lot of branded systems that require special format filters and membranes (https://www.premierh2o.com/ro-pure-plus-voc-system), which can naturally only be sourced from the manufacturer. A good 4-stage system can be sourced for about $200 give or take.

    RO was developed to desalinate water. Therefore, if you use a salt-based ion exchange water softener (the standard water softener) and then run that through an RO, it’ll be a pretty straightforward process. The more pressure you can provide up front (within the specs of the system), the more efficient the system will be. (Actually, it’s the pressure differential that really makes a difference, so if you’re pulling out one cup at a time, it’s less efficient than pulling out a litre). If your water is very hard, there will be more brine produced. There are ways to minimize that waste (effectively by injecting it into the hot water supply), if that’s important to you.

    A distiller will have the same problems any boiler will have.

    I’ve got a softener and a RO. It comes in between 450 and 550ppm and leaves around 30-70ppm. You typically want to see a >90% reduction; less than that and the membrane needs replacing or you may have pressure issues.



  • This is great, because it shows the possibilities. Water source heat pumps make air source look like a toy, and those in turn make conventional heat sources look prehistoric.

    However, it is not uncommon in more seasonal climates for the average solar production to exceed the average energy consumption across the year, while the reality is that summer is characterized by overproduction and winter requires consistent top-ups from the grid. Adding a small wind turbine is a challenge from a charge controller perspective (you can’t just plug into an EG4) but it can really address those short, cloudy days with high consumption.



  • A sales tax disproportionately impacts people who are lower income, as a greater percentage of their earnings go towards purchasing essential goods - and defining exclusions for sales taxes is a whole exercise. Food, easy; heat, ok. But what if i heat with electricity and also drive with electricity? Should clothes be taxed? Where do we draw the line on what constitutes luxury clothing when people buy carhartt for very different reasons depending on their income source. What about diapers, people choose to buy disposables. Condoms? Period products are a shoe-in but what about cups or reusable panties?

    I don’t hate the idea, but it is complex. Like most tax schemes…


  • There’s a lot of talk about how taxing share grants and stock options potentially harms innovation, as it impacts startup employees. Startup doesn’t have enough cash to attract top tier employees, so they’re offered stock grants as part of compensation which is fair enough. But if they’re taxed, and the stocks are illiquid (pre IPO), the employee is going to end up paying a whole bunch of tax on something that might, in the future, be worth a certain amount.

    Collecting the taxes in-kind is a simple and incredibly obvious solution now that I see it.


  • Poor people obviously can’t afford a MagSafe charger. Target market is poor people who can’t afford a $1000 phone. Ergo.

    But seriously, i suspect that it’s something along those lines. People who hold onto their phone longer and/or buy older model phones may not use MagSafe. Personally, I only use it in the car. I’m not a huge fan of the idea of charging losses, and I’ve had trouble finding chargers that fit my desires (ie desk charger; I don’t own a watch or AirPods).