· By Jos Whettingsteel
The Filter Machine Deserves Another Look
The filter machine earned its bad name. Most of us grew up with one in an office kitchen, a jug of brown water baking on a hotplate from 8am until someone finally tipped it out at three.
That was never a problem with filter coffee. It was a problem with bad machines, and with how people used them. A good drip machine, fed good beans, makes a clean, sweet litre of coffee while you get the kids' shoes on. Our brew guide calls batch brew the method cafe owners trust, and it is just as good at home. There is one on our own kitchen bench at home.
So here is what separates a good filter machine from a bad one, what to look for before you buy, and the batch brew recipe we use.
It's a Pour Over That Pours for You
Strip the plastic off and a drip machine is simple. Cold water sits in the tank at the back. A heating element warms it and pushes it up a tube to a shower head sitting over the basket. The water rains down onto a bed of ground coffee in a paper filter, soaks through, and drips out the bottom into the carafe underneath.
That is a V60 pour over, done by a machine. Everything your hand does on a V60, the machine has to do on its own. Hot enough water. Spread evenly over all the coffee. At a steady pace, for the whole brew.
A bad machine fails at one of those three jobs. Usually more than one.
What Separates a Good Filter Machine From a Bad One
You don't have to guess. The Specialty Coffee Association publishes a standard for home filter brewers, SCA Standard 310-2021, and certifies machines that pass it. Here is what it actually tests, in plain English.
| What they test | What a certified machine must do | Why you care |
|---|---|---|
| Water temperature | Coffee bed reaches 90 to 96°C by the time a third of the water is in, and stays there | Too cool and the cup comes out thin and sour |
| Even wetting | Grounds at the edge, middle and centre of the basket brew evenly | A single stream drills a hole in the middle and leaves the edges half brewed |
| Basket size | Holds a full pot's worth of coffee without overflowing as it swells | No grounds in your cup, no mess on the bench |
| Consistency | Three machines, five brews each, all within target | Tuesday's pot tastes like Monday's |
| Keeping it hot | A heated plate holds the coffee at 80 to 85°C for 30 minutes and never pushes it above 85°C | This is the office jug problem, solved |
Temperature is the big one. Water below that window cannot pull the sweetness out of the grounds in the few minutes it has, and we explained why in Why Your Kettle Matters. A pour over lets you fix that with your kettle. A machine doesn't. Whatever temperature it heats to is what you get, every morning, for as long as you own it.
The easy shortcut is the SCA certified badge on the box, or the certified list on the SCA's own website. Somebody has already put a thermometer in the coffee bed so you don't have to.
No badge? In the shop, look at three things. A wide shower head with lots of holes, not one spout in the middle. A basket wide enough for a litre's worth of coffee to swell. And either a thermal carafe or a hotplate that switches itself off. Cheap machines that get those right can do a solid job. Expensive ones that get them wrong can't be saved by any bean.
The Batch Brew Recipe We Use
This is the batch recipe from our brew guide. One litre of water, which is four good mugs.
| Batch Brew | People Everyday / No Sleep Till Brooklyn | Hyperdrive |
|---|---|---|
| Coffee | 60 g | 65 g |
| Water | 1 litre, cold, filtered | 1 litre, cold, filtered |
| Ratio | About 1:16 | About 1:15 |
| Grind | Medium, like sand | Medium, like sand |
| Brew time | 4 to 6 minutes | 4 to 6 minutes |
1. Fill the tank with cold or room temperature water. Filtered, if you are on Perth tap water. Ours is hard, and here is what that does to your coffee and your machine.
2. Grind medium. Paper filter in the basket, coffee in, give it a gentle shake so the bed sits level. No tamping.
3. Press the switch and walk away. This is the whole point.
4. Swirl the carafe before you pour. The first coffee to drip through is the strongest and the last is the lightest. Pour the first cup straight off the top mid-brew and you get a mug of rocket fuel, and everyone after you gets tea. A gentle swirl mixes it back into one pot.
Tweaking it is simple. Weak? More coffee or a finer grind. Bitter? Less coffee or a coarser grind. One change at a time.
One roastery note. The SCA tests every machine at 55 g per litre. We brew at 60, a touch stronger, because we like a bit more body in the cup. If it tastes too strong for you, take the coffee down a few grams at a time.
If you buy pre-ground, we grind for espresso, plunger and AeroPress, not filter. Pick AeroPress. It is the medium grind on our brew guide, the same as a filter machine. Wholebean ground fresh is better again.
Four Habits That Make or Break It
Twenty minutes on the hotplate, tops. After that a glass carafe starts to cook and go stale. If you won't finish the pot, pour it into a thermos straight away.
Fresh beans. Use them within 4 weeks of the roast date. They peak between 7 and 14 days. A litre a day goes through a bag fast, so that part looks after itself.
Clean it like you mean it. Old coffee oils in the basket and carafe go rancid and taint every pot after. Rinse the basket and carafe after every brew.
Descale. Hard water leaves scale in the heater every time it runs. Scale makes the element work harder and, left long enough, it kills machines. Descale every 2 to 3 months.
The BOM Take
Filter isn't the lesser coffee. It is the most generous one. A good machine hands you a litre of properly brewed coffee for four people while you do literally anything else, and it does it the same way every single morning.
Buy a machine that gets the water hot and spreads it evenly, feed it fresh beans, and keep it off the hotplate. That is 90 per cent of it sorted.
Try this on the weekend. 60 g of People Everyday, a litre of cold filtered water, medium grind, press the switch. A 1 kg bag is about 16 pots at that recipe. Swirl, pour, and call everyone in.
Keep reading: Pour Over at Home · Why Your Kettle Matters More Than You Think · Perth Tap Water Is Wrecking Your Coffee · The Brew Guide
Want to taste what we're talking about? Check out our blends and we'll keep you sorted.
Written by Jos at Brother of Mine, specialty coffee roasters in Perth.
