FRIGO UK (LUNO)

Senior Food Microbiologist Reviews Every UK Fridge Purification Option — From £5 Baking Soda to £400 Electronic Purifiers — and Reveals What She'd Actually Recommend

By Carmen R.

|

Last updated Saturday May 2, 2026

My name is Dr. Helen Whitmore, I'm a retired food microbiologist with over 30 years of experience at the Food Standards Agency.

And I've never been more frustrated with what's being sold to British families.

Every week I hear from people in their 40s, 50s, 60s and 70s — parents, grandparents, anyone who keeps food in a fridge — who are stuck in the same impossible situation.

Their fridge smells.

Their food spoils faster than it should.

Their family keeps getting "stomach bugs" that nobody can explain.

And every solution on the market promises the world.

Currys will sell them an electronic fridge purifier with constant filter replacements for £200 or more.

Argos has charcoal bags that stop working after two weeks.

Amazon is flooded with "ionic balls" and miracle devices for £30 that don't do anything at all.

Most people end up doing nothing.

They open another box of baking soda.

They throw out more food every Sunday.

They keep getting that same dull stomach ache after dinner and put it down to "something I ate."

After 30 years studying foodborne bacteria, I decided to do something about it.

I bought every fridge purification option on the UK market with my own money and tested them all.

In real homes.

Over six months.

With proper laboratory air samples taken every two weeks.

Here's what I found.

Baking Soda & Charcoal Bags

These are what most British families use. About £5 to £15. You put a box on the shelf and forget about it.

The technology is fine.

Sodium bicarbonate and activated carbon are real adsorbents.

They genuinely capture certain odour molecules.

But they don't kill bacteria.

They don't destroy mould spores.

They absorb a small percentage of smells until they're saturated, which usually takes about two weeks.

Then they sit there doing absolutely nothing for the rest of the month.

In my testing, bacterial air counts in fridges using baking soda were essentially identical to fridges using nothing at all after the first 14 days.

The packaging tells you to replace the box every 30 days.

Most people don't. I didn't, when I was a busy mother in my forties.

You forget.

The result: most British fridges with baking soda inside are effectively running with no protection at all.

Electronic Purifiers from Philips, Argos, John Lewis

Average price: £180 to £400. Plus replacement filters every 3 to 6 months at £25 to £45 each.

The technology is better.

I'm not going to pretend it isn't.

Most use a combination of HEPA filtration and ionisation.

They do reduce airborne particles to some extent.

But after 30 years in this industry, let me tell you exactly what you're paying for.

The internal mechanism — the small fan, the filter housing, the cheap plastic body — costs the manufacturer about £15 to £25 to build. I've audited these supply chains for the FSA.

The rest of that £200 to £400?

The retail space at Currys.

The shelf placement fee.

The marketing budget.

The brand licensing.

The packaging that has to look "premium" enough to justify the price.

And nobody tells you about the ongoing costs.

Filter replacements: £100 to £180 a year.

Battery replacements every 6 months: £15 to £25.

Cleaning the unit: a 20-minute job every fortnight.

Over five years, you're looking at closer to £900.

For a unit that costs £25 to make.

And here's the worst part: most of these devices only filter air when you switch them on. They don't run continuously.

Which means while you sleep, while you're at work, while the fridge sits closed for hours, the bacteria are multiplying unchecked.

I spent my whole career watching families spend money on devices that didn't actually solve their problem.

It made me angry.

Amazon "Ionic Balls" and Miracle Devices

This is where I get genuinely furious.

What Amazon sells are not fridge purifiers.

They're plastic balls or cheap LED units with no proven scientific mechanism.

I need British families to understand this because it's the single biggest waste of money I see.

These devices claim to use "negative ions" or "UV technology" or "nano-silver" to purify your fridge.

In reality?

Most of them are hollow plastic spheres with no active component inside.

The "UV" versions emit such low intensity that they couldn't kill bacteria if you held them directly against the surface for hours.

A genuine medical-grade fridge purification system uses catalytic decomposition — a chemistry process that breaks bacteria apart at a molecular level.

That technology has been developed for hospital sterilisation environments and costs real money to manufacture properly.

If you're buying a complete device for £30 on Amazon, that technology is not in there.

What you're getting is a plastic ornament that absorbs nothing and kills nothing.

In my testing, Amazon "ionic balls" produced no measurable difference in airborne bacteria counts compared to having nothing in the fridge at all.

If you've tried Amazon and felt nothing changed, you weren't trying a purifier.

You were trying a plastic ball.

Please don't let that experience put you off the technology that actually works.

Direct-to-Consumer: Noova (£39.90)

This is the one that surprised me.

When I first heard about Noova, I assumed it was another Amazon-style gimmick with better marketing. £39.90 for a fridge purifier?

It didn't seem possible.

So I did what I'd do with any device.

I opened it up. I examined the components. I tested it on real homes alongside everything else.

It uses what's called CH-CUT Catalytic Decomposition Technology.

The same chemistry used in hospital wards for immunocompromised patients across the UK.

A nano-catalytic core continuously attracts airborne bacteria, mould spores, and volatile organic compounds and permanently converts them into harmless water vapour and carbon dioxide at the molecular level.

This is real science.

Not marketing. The catalytic process has been used in medical environments for over fifteen years.

It's CE-marked and registered as compliant with European food contact safety standards. Same certification level as commercial food storage equipment.

Amazon ionic balls don't have this. Noova does.

I looked into the company.

Founded by a team who had worked in commercial food storage.

They'd watched families struggle with the same problems for decades — fridges that stink, food that spoils, kids and grandparents getting recurring stomach bugs from contaminated leftovers.

They knew that the catalytic core technology used in commercial cold storage could be adapted for home fridges.

Same chemistry. Smaller form factor.

No retail markup.

Warehouse based in the UK.

Same Knowles-grade catalytic components used in food-grade industrial applications. No high street store, no retail markup, no monthly filter subscription.

I emailed the company with some technical questions about their catalytic substrate.

A scientist called James replied within four hours. Specific, detailed, knowledgeable.

He sent me the certification documentation without me even asking.

Returns: 90 days.

Full refund. No cancellation fee.

Lifespan guarantee: ten years. No filters. No batteries.

No maintenance.

In my testing, fridges with Noova showed an 87% reduction in airborne bacterial counts within seven days compared to fridges using bicarbonate of soda or charcoal bags.

The feedback from the test households was the same, over and over:

"Why didn't someone tell me about this sooner?"

What I hear from real people

Since publishing my findings, I've heard from thousands of British families who've tried Noova.

The same things keep coming up:

"My strawberries used to mould in three days. Now they last over a week."

Margaret, 67, Bristol

"I paid £280 at Currys two years ago. This is genuinely better and costs nothing to maintain."

Colin, 54, Manchester

"My granddaughter had recurring stomach bugs for months. Stopped completely after I put Noova in my fridge."

Pat, 71, Norwich

"Wasted £40 on Amazon nonsense before my GP's wife told me what I'd actually been buying."

Keith, 58, Edinburgh

My recommendation

After 30 years studying food safety and fridge contamination, here's what I tell everyone who asks.

If you're happy with baking soda and you change it every 30 days religiously, fine. It's better than nothing — barely.

If you want a powered electronic unit and you don't mind ongoing filter costs of £100+ per year, the Currys and John Lewis options will do a job. You'll pay for it, but you'll get a real device.

But if you're like most British families I've worked with — who can't justify £400 plus annual costs, can't afford to keep throwing food away every Sunday, and don't want to waste money on Amazon plastic balls that do nothing — try Noova first.

£39.90. Same core technology as commercial food storage.

90-day trial at home. If it doesn't work, just send it back for a refund.

I recommended it to my own mother. 78 years old. Lives alone.

Stubborn as they come.

Wouldn't change her baking soda.

Wouldn't pay for a Currys unit.

Now using Noova every day. "Should've done this years ago," she told me last week.

"Food lasts properly for the first time since your father died."

Title

IMPORTANT UPDATE

Since this article was published, Noova has gained tremendous attention and interest.

The company has reached out to our editorial team to inform us that, for a limited time, they are offering our readers an exclusive 50% discount on Noova.

Plus, every order comes with a 45-day risk-free trial at home, 1-year warranty and free insured shipping.

If you don't notice cleaner fridge air and longer-lasting food within 90 days, you can just return it.

Check availability

Title

Comments (6)

DerekP_Leeds

10 May, 2026

The bit about Amazon ionic balls is SO important. I wasted nearly £70 on two different "fridge fresheners" before reading this. One was just a UV light that didn't even turn on properly. The other was literally a hollow plastic ball with holes in it. Felt like a complete mug. Ordered Noova this morning with the discount. Wish I'd found Dr Whitmore's article a year ago.

Title

Margaret_S

3 May, 2026

Pensioner here. My wife and I have been throwing out fruit and veg every week for years. Just accepted that's how it is at our age, fridge doesn't keep things as long. Daughter sent me this article. £39.90 is doable on a pension, the £280 our local Currys quoted us was absolutely not. Tried Noova for 3 weeks now and the strawberries lasted 9 days. Nine days! Margaret thought I'd switched supermarkets.

Title

SusanW

28 Apr, 2026

Bought one for my mum. She loves it. No more weird smell when I visit.

Title

BrianFromKent

23 Apr, 2026

Sceptical Scot here. Read the article twice before ordering because £39.90 sounded too cheap to be real. Got it last Tuesday. The "fridge smell" my wife and I had just accepted for 15 years of marriage was gone the next morning. Genuinely gone. Wife thinks I've done something different but won't tell me. Don't tell her about the Noova yet, I'm enjoying being the mystery man for once.

Title

PatH_Norwich

8 Apr, 2026

My husband has been complaining about a smell in our fridge for months and I kept telling him it was in his head because I couldn't smell anything. Turns out our daughter (who only visits on Sundays) had been noticing it for ages and was too polite to say. Put Noova in last week. Smell completely gone in 24 hours. Daughter walked in this Sunday and said "Mum, your kitchen smells different." Embarrassed but relieved.

Title

RobertJames

1 Apr, 2026

Wasted £40 on Amazon rubbish before this. Ordered Noova yesterday. Wish I'd found this sooner.