Know What Is In The Air You Are Breathing
Birch is a small monitor that shows you the carbon monoxide in your home, in real digits, second by second, all day and all night. Built for the people a standard alarm was not built to catch.
- ✓ Stop guessing about the air in your own house. Start knowing.
- ✓ Shows the real number on a screen, not a green light on a wall.
- ✓ Catches what a standard alarm was not built to catch.
- ✓ Plugs in. Reading in thirty seconds. No tools. No batteries to remember.
"I ordered Birch the morning after my furnace technician left. Every day since, that small screen has read zero, and every morning I check it the way I check that I have turned off the kettle. After a certain age, you want the fact."
Have any of these become normal in the last six months?
Tired in the morning, even after a full night's sleep.
A dull headache that the afternoon does not clear.
Brain fog. Forgetting why you walked into the room.
An afternoon that ends an hour before you do.
These are the four most common signs of long, low carbon monoxide exposure.
They are also, exactly, what an older body slowing down looks like. Your doctor runs the bloodwork. The bloodwork comes back clean. The air in your own house is not something the bloodwork can see.
Built For The People A Standard Alarm Was Not Built For.
A standard carbon monoxide alarm is calibrated to wake a healthy adult before a leak large enough to kill them in one night can kill them. That alarm was designed for one kind of body. The bodies that suffer first from a slow leak (smaller bodies, older bodies, bodies that sleep deeply, bodies with less margin to spare) are not that body.
Birch was built to close that gap. Same air, same room. The difference is that Birch does not wait for the air to get bad enough to wake a healthy man. Birch shows you the number, second by second, starting at zero.
Zero means the air is clean. Any number above that, you see the moment it begins, in plain digits, on a screen you can read across the room.
While the furnace runs all night. While the windows stay shut all winter. While you sleep more deeply than you used to. Birch never stops reading the air.
Plug into any wall outlet. Reading in thirty seconds. No tools, no ladder, no electrician, nothing to replace. The day you receive it is the day you know what is in your air.
What Doctors Are Saying
Internal Medicine
"I see older patients come in with fatigue, brain fog, low-grade headaches, sleep that has changed. The bloodwork is usually clean. I treat for what I can see. What I cannot test for, in a fifteen-minute appointment, is the air in the house they go home to. A monitor on the wall that reads in real time closes a gap I cannot close from the exam room."
The week I plugged Birch in, the bedroom read 24 PPM the first morning. HVAC tech found a cracked heat exchanger. I had my mornings back inside ten days of the repair. I will never stop thinking about those two months.
I noticed I was always clearer-headed after errands. Worse the longer I was at home. I thought it was just being out around people. The bedroom read 17 PPM the first morning Birch was on the wall. Furnace flue, partially blocked. I have been myself again since the repair.
My doctor said my fatigue was age and the bloodwork was clean. I ordered Birch anyway. Zero every morning, then one Tuesday it read fifteen. Slow leak from the water heater flue. I had been sleeping in that house for six weeks past where I should have called somebody.
Second day on Birch: twenty-two PPM, right where I sit to read every night. My old detector? Still glowing green. Still silent. HVAC found a cracked heat exchanger. I do not let myself think too long about how many evenings I had been sitting in that.
I had a detector for fifteen years. Tested it every change of the clocks. Birch showed thirty-one PPM in the kitchen the first week. The old one? Green. Silent. Cracked burner seal in the stove. I am in that kitchen every single day. I do not run the what-ifs on that one too long.
What Makes Birch Different
| Standard Carbon Monoxide Detector | Birch | |
|---|---|---|
| Alarm threshold | 70 PPM (healthy adult) | Shows from 0 PPM |
| Real-time reading | ❌ Green light only | ✅ Live digital display |
| Built for older adults | ❌ Calibrated for healthy adults | ✅ Catches the slow leak |
| Early warning | ❌ After hours of exposure | ✅ Before symptoms |
| Doctor-recommended | ❌ | ✅ |
CHOOSE FOR YOUR HOME
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Your Purchase Is Protected By Our 90-Day 100% Money-Back Guarantee
Plug it in tomorrow morning. Watch the number for 90 days. If it isn't the most reassuring thing you've ever seen — email us. Full refund. Every penny. You don't have to ship it back. Keep it. Give it to a friend. Throw it out. The refund is yours.
✅ 90-day money-back guarantee
Bedroom where I sleep. Four days after plugging Birch in: 26 PPM. The old detector on the same wall, still showing green. Gas company found a loose furnace fitting. I had been sleeping in that room every night for as long as I have lived in this house. Birch is the reason I still do.
I had been tired for months and my doctor checked everything. The bloodwork was fine. I ordered Birch on my daughter's recommendation. It read 19 PPM in the bedroom two weeks later. Water heater flue, partially blocked. I had been sleeping in there every single night that month.
My dad is 78. Lives alone in the house he and my mom bought in 1971. His old detector was nine years old, the sensor was long dead, the green light was still glowing. I sent him a 4-Pack. Now when I call him he tells me the screen reading before he tells me about his morning. "Zero, sweetheart." Best word I have ever heard.
Questions From People Like You
You Are Home Right Now. What Are You Breathing?
Some people plug in Birch and are surprised at the number they see.
They think about how long it had been building.
How many mornings they had woken up tired and not known why.
Some find zero. Every day.
And they feel something they did not expect.
Not just relief.
Certainty.
TRY BIRCHFree Shipping · 90-Day Guarantee · Ships in 24 HoursP.S. A clean reading is the best outcome there is. If your number comes back at zero, and most of them will, then you have lost nothing. You have what Walter now has, which is a quiet certainty in the morning. We hope that is the one you get.