If you’re upgrading to a big American fridge freezer, you want more than just extra space. You’re looking for a layout that works for family life, fuss-free maintenance, sensible running costs and features you’ll actually use. The Hisense PureFlat range is designed to tick all of those boxes, and models like the Hisense PureFlat Infinite RQ758N4SWFE Wifi Connected Total No Frost American Fridge Freezer in black stainless steel have become popular options in UK homes.
This guide walks through what to think about before you buy, how a PureFlat-style appliance can fit into your kitchen, and how it compares with related models such as the stainless-steel RQ758N4SWSE and the tall RS818 series. If you want in-depth impressions, you can always read our full review of the Hisense PureFlat Infinite RQ758N4SWFE once you’ve got a handle on the basics.
Understanding PureFlat American fridge freezers
PureFlat models are built to sit neatly in a modern kitchen, with doors and handles that don’t jut out any more than they have to. The Hisense PureFlat Infinite RQ758N4SWFE is a four-door American fridge freezer, which means you get a wide double-door fridge section at the top, and two separate compartments below for frozen or extra chilled storage.
That layout feels very different to a traditional tall, narrow fridge freezer. Instead of stacking everything high and deep, you get wide, shallow shelves that make it easier to see food at a glance. It also makes hosting easier: wide platters, big salad bowls and pizza boxes are much simpler to slide into place.
If you like the look of the PureFlat styling but prefer a different finish or layout, it’s worth comparing similar options such as the stainless-steel Hisense PureFlat Infinite RQ758N4SWSE or the taller side-by-side style of the Hisense PureFlat RS818N4TFC and Hisense PureFlat Infinite RS818N4TIC.
Checking size and kitchen fit before you buy
American fridge freezers are big, and four-door models like the RQ758N4SWFE tend to be particularly wide. Before falling in love with the idea, grab a tape measure and check a few key points.
Measure the gap & door swing
First, measure the width, depth and height of the space where you want the appliance to live. Don’t forget skirting boards, overhanging worktops and any radiators or door frames that nibble into the usable width.
Next, think about the doors. Wide French doors need space to open out fully if you’re going to pull out drawers without banging into units. If you’ve got a tight corner, a tall side-by-side alternative like the RS818N4TFC or RS818N4TIC, with narrower doors, may give you more room to manoeuvre.
Plan the delivery route
With big-capacity models, the biggest headache is sometimes getting them into the kitchen at all. Measure your front door, hallway, internal doors and any awkward turns or staircases. Compare those measurements with the product dimensions and allow a bit of wiggle room.
If space is tight, some households look at slightly slimmer still-large models such as the Hisense PureFlat RF749N4SWSE. It keeps the PureFlat styling and Total No Frost technology but in a slightly different footprint that can be easier to accommodate.
Key features to look for in an American fridge freezer
Once you know a big fridge freezer will fit, the next step is choosing features. The Hisense PureFlat Infinite RQ758N4SWFE bundles most of the modern essentials into one appliance, which makes it a useful benchmark for what to expect.
Total No Frost for low-maintenance ownership
Total No Frost means the appliance is designed to stop ice from building up in the freezer compartments. Instead of thawing and chipping away frost every few months, you just keep using it as normal. For a large appliance with big drawers and multiple compartments, that’s a serious time-saver.
Several PureFlat alternatives, including the RQ758N4SWSE, RS818N4TIC and RF749N4SWSE, are also described as Total No Frost models, so you don’t need to compromise on this when you shop around. If a model only mentions “frost free” rather than Total No Frost, that usually means frost is reduced rather than completely eliminated.
Flexible compartments and multi-zone storage
Many four-door American fridge freezers offer flexible lower compartments, where you can adjust the temperature to suit what you’re storing. That might mean using one lower area as a conventional freezer and the other as extra chilled space for drinks or party food at different times of year.
When you compare models, pay attention to how clearly the manufacturer explains these zones and how easy they are to adjust. If you regularly host, bulk-cook, or stock up at the wholesaler, the ability to shift space from frozen to fresh and back again can make a real difference to how the appliance works around you.
WiFi connectivity and smart control
The RQ758N4SWFE is listed as WiFi connected, which puts it firmly into the smart kitchen camp. With a compatible app, this usually lets you monitor temperatures, receive alerts if a door is left open, and sometimes switch cooling modes or holiday settings when you’re away from home.
If you like that idea, you’ll find similar connectivity on the RQ758N4SWSE, the RS818N4TFC and the RS818N4TIC as well. If you’re not fussed, you can simply ignore the app and use the on-door controls as normal.
Plumbed vs non-plumbed: which dispenser setup suits you?
One of the biggest decisions with American fridge freezers is whether to go plumbed or non-plumbed for water and ice. The RQ758N4SWFE is described simply as Wifi Connected and Total No Frost in its full title, but its close relative, the Hisense PureFlat Infinite RQ758N4SWSE, is explicitly labelled as a “Non-Plumbed” Total No Frost American fridge freezer.
That non-plumbed tag tells you it uses an internal tank instead of a direct mains connection. You fill the tank by hand, and the fridge chills the water ready for the dispenser. Ice-making is usually handled in a similar way, drawing from the tank.
- Plumbed-in designs offer effectively unlimited chilled water and ice but need a water supply behind the appliance and may require professional fitting.
- Non-plumbed designs offer more freedom on where you place the fridge and are easier to slot into existing kitchens without altering pipework.
If your preferred spot in the kitchen is miles away from any pipes, a non-plumbed model such as the RQ758N4SWSE, RS818N4TFC, RS818N4TIC or RF749N4SWSE can make life much simpler.
Finish and style: black stainless steel vs classic stainless
Beyond layout and features, the finish has a big impact on how your American fridge freezer looks day to day. The Hisense PureFlat Infinite RQ758N4SWFE comes in black stainless steel, which has become popular in modern UK kitchens.
Black stainless tends to sit nicely alongside darker cabinets and can be a softer contrast against white or grey units compared to traditional silver. It also hides some fingerprints and smudges better than polished metal, although you will still want to wipe it down now and again.
If you prefer a more classic look, the PureFlat range includes stainless-steel options like the RQ758N4SWSE, the RS818N4TIC and the RF749N4SWSE. When you compare them, think about your flooring, worktops and lighting as well as your cabinets – big appliances become a focal point, so you want the finish to feel deliberate, not like an afterthought.
Capacity and family life: choosing the right size
Capacity is usually quoted in litres, but what really matters is how that space is arranged. The RQ758N4SWFE’s four-door layout focuses on wide, easily accessible storage. That suits family life very well: kids can see snacks, you can keep leftovers in full view, and it’s easy to survey what you have before a big shop.
If you store a lot of frozen food, a taller, side-by-side design like the RS818N4TFC or RS818N4TIC can be appealing. You get more vertical freezer space at eye level and long shelves that work well with boxed and bagged items. For smaller households, a slightly more compact PureFlat like the RF749N4SWSE can give you much of the American style without quite as much bulk.
Energy rating and running costs
Many large American fridge freezers now carry E or C energy ratings under the newer, stricter scale. The RQ758N4SWFE is specified as E rated in its full product name, as are the RQ758N4SWSE and RF749N4SWSE, while the RS818N4TFC and RS818N4TIC are described as C rated.
On the updated rating system, a C-rated appliance is more efficient than an E-rated one, but do keep the overall size in mind. A very big fridge with a slightly better rating may still use more electricity than a smaller one with a lower letter. To keep bills sensible, look for:
- A rating that suits your budget and priorities.
- Good door sealing and sensible use of drawers to minimise cold air loss.
- Features like holiday mode, which keep the freezer running while reducing fridge cooling when you’re away.
Everyday use: tips to get the best from a PureFlat fridge freezer
Once your big American fridge freezer is in place, a few simple habits make it easier to live with and help it last longer.
Set sensible temperatures
Many large appliances arrive with factory settings that are fine for most homes, but it’s worth checking the recommended fridge and freezer temperatures in the manual. Don’t crank the controls to the coldest setting unless you need to quickly chill a big shop – it can use more energy with no benefit to everyday food safety.
Use the compartments as intended
If your model includes dedicated fresh zones, meat drawers or flexi compartments, use them as labelled. These areas are tuned for particular types of food and can help ingredients last longer if used properly. In a four-door layout like the RQ758N4SWFE, keeping a consistent system also makes it much easier for the whole household to find things.
Load it thoughtfully
Don’t push food right up against air vents, as that can block circulation and create warm spots. Avoid cramming every shelf edge to edge; leaving a bit of space for air to flow helps the appliance keep a stable temperature. In the freezer, stack flat where possible and use clear containers or labels so you can see what’s what.
Cleaning and maintenance basics
One of the nice things about Total No Frost models such as the RQ758N4SWFE, RQ758N4SWSE, RS818N4TIC and RF749N4SWSE is the reduced need for deep defrosting sessions. You still need to keep on top of general cleaning though.
- Wipe up spills quickly so they don’t dry onto shelves and drawers.
- Every few months, take out removable shelves and drawers and wash them in warm, soapy water.
- Use a soft cloth and a cleaner suitable for your finish on the doors, particularly for darker colours such as black stainless steel.
- Check the door seals for crumbs or debris and gently clean them so they can close properly.
Good habits help any large appliance run efficiently, whatever the energy rating. If you want a detailed sense of how this plays out in real-world use, you can read our full Hisense PureFlat Infinite RQ758N4SWFE review for more day-to-day insights.
Comparing key Hisense PureFlat options
Once you’ve decided on a PureFlat-style American fridge freezer, it’s sensible to compare a few close models side by side. Here’s how the main options covered in this guide line up conceptually:
- Hisense PureFlat Infinite RQ758N4SWFE (black stainless, E rated) – Four-door American layout, Total No Frost, WiFi connected, striking dark finish.
- Hisense PureFlat Infinite RQ758N4SWSE (stainless, E rated) – Very similar specification but in classic stainless steel and with a specific non-plumbed water/ice focus.
- Hisense PureFlat RS818N4TFC (black stainless, C rated) – Tall side-by-side layout, non-plumbed, Frost Free design with a stronger energy rating, ideal if you prefer narrow doors.
- Hisense PureFlat Infinite RS818N4TIC (stainless, C rated) – Similar tall side-by-side approach, stainless finish and Total No Frost convenience.
- Hisense PureFlat RF749N4SWSE (stainless, E rated) – Non-plumbed Total No Frost American-style model with PureFlat doors, useful if you want big capacity in a slightly different configuration.
All of these sit in a similar space on price, with variations depending on features, finish and capacity. Knowing how they differ on layout, water supply and energy rating makes it much easier to pick the one that genuinely fits your kitchen and lifestyle.
Final thoughts
Choosing an American fridge freezer is about more than grabbing the biggest model you can find. Thinking carefully about layout, finish, energy rating and how you’ll actually use the space will help you land on the right choice first time, whether that’s the Hisense PureFlat Infinite RQ758N4SWFE in black stainless steel or a close PureFlat cousin like the RQ758N4SWSE, RS818N4TFC, RS818N4TIC or RF749N4SWSE.
Once you’ve narrowed down your shortlist, take a closer look at real-world performance, build quality and ownership experiences. You can start by reading our full review of the Hisense PureFlat Infinite RQ758N4SWFE and then diving into the linked reviews of the alternative models to find the one that will serve your kitchen best for years to come.