If you’re upgrading to a big American-style fridge freezer, you’re probably looking for loads of space, modern styling and as little day-to-day hassle as possible. The Hisense PureFlat Infinite RQ758N4SASE Total No Frost American Fridge Freezer is one of a new wave of four-door models that promise exactly that: masses of room, a sleek flat-front design and fuss-free cooling. In this guide, we’ll walk through what to look for in a large American fridge freezer, using the Hisense PureFlat range as a real-world example, and highlight a few close alternatives so you can choose the right fit for your kitchen.
Understanding the Hisense PureFlat Infinite RQ758N4SASE
The Hisense PureFlat Infinite RQ758N4SASE is a stainless steel, four-door American fridge freezer with Total No Frost technology and an E energy rating. It sits in the popular PureFlat range, which focuses on clean lines, a flush door design and generous capacity that suits busy households and open-plan kitchens.
Rather than diving into every last technical detail here, this article focuses on real-world buying and ownership advice. If you want a specification deep-dive, you can read our full review of the Hisense PureFlat Infinite RQ758N4SASE for dimensions, internal layout photos and user impressions.
Four-door vs side-by-side: which layout suits you?
Traditional American fridge freezers put the fridge on one side and the freezer on the other. The RQ758N4SASE, like the rest of the Hisense PureFlat Infinite family, uses a more modern four-door layout: double doors at the top for the fridge, and double doors at the bottom for the freezer compartments.
This design has a few everyday advantages:
- Better access to fresh food: Wide shelves at eye level make it easier to see salads, leftovers and dairy, so less gets forgotten.
- Less cold air loss: You often only need to open one small door at a time, helping to keep temperatures stable.
- Flexible lower storage: Some four-door models use convertible zones; even when they don’t, the separate compartments help you organise frozen food logically.
If you love this four-door concept but want smart connectivity as well, it’s worth looking at the Hisense PureFlat Infinite RQ758N4SWSE, which adds Wi-Fi control and a non-plumbed water dispenser to a very similar overall layout.
Measuring up: getting the size and fit right
One of the biggest pitfalls with American fridge freezers is simple: they don’t fit. Before you get too attached to a particular model, take a tape measure to your kitchen.
Width, height and depth
American models are usually wider and deeper than standard fridges. Check:
- The width of the gap, allowing for a few centimetres of clearance either side.
- Ceiling height and any low-hanging cabinets or coving above.
- Depth, including handles, to make sure doors can open freely without banging into islands or walls.
The PureFlat styling of the Hisense RQ758N4SASE helps here, as the doors are designed to sit relatively flush for a built-in look. For exact measurements and clearances, you can check the full RQ758N4SASE review, where we break down installation considerations in more detail.
Doorways, hallways and corners
Don’t forget the route from your front door to the kitchen. Measure narrow hallways, tight corners and internal doors to be sure the appliance can be manoeuvred into place. Many four-door models allow the doors to be removed temporarily to ease delivery, but it’s still better to confirm beforehand than face disappointment on delivery day.
No Frost and everyday convenience
The RQ758N4SASE is a Total No Frost model, which means it constantly circulates air to keep freezer ice at bay. For a large freezer section, this is more than a nice-to-have; it keeps drawers gliding smoothly and prevents a thick layer of frost building up on your food and the walls.
With a big family-sized appliance, defrosting manually would be a significant chore, so going for Total No Frost is highly recommended. If you’re comparing options, look for the words “Frost Free” or “Total No Frost” in the product description, like on the Haier FD 70 Series 5 HFR5719ENMG Frost Free American Fridge Freezer, which offers a slightly different take on American design but the same low-maintenance cooling.
Energy rating and running costs
The Hisense PureFlat Infinite RQ758N4SASE carries an E energy rating. On the newer energy label scale, this is fairly typical for a modern American fridge freezer, especially one with a big capacity and multiple compartments.
To keep running costs sensible:
- Allow proper ventilation space around the sides, rear and top.
- Set the fridge to around 4°C and the freezer to around -18°C; colder isn’t usually necessary.
- Avoid leaving the doors open while you decide what to eat.
- Let hot leftovers cool before putting them inside.
If energy efficiency is one of your main concerns, it’s worth cross‑checking similar E‑rated rivals like the Haier HFR5719EWMP Non-Plumbed Total No Frost American Fridge Freezer. Comparing annual kWh figures between models gives you a much better sense of running cost differences than just looking at the letter on the label.
Water, ice and smart features
The RQ758N4SASE itself focuses on clean lines and core cooling performance rather than showy add‑ons. If you’re keen on chilled water, ice or connectivity, the broader PureFlat Infinite family has you covered.
Non-plumbed water dispensers
The Hisense PureFlat Infinite RQ758N4SWSE adds a non-plumbed water dispenser to a very similar format. Instead of needing a mains water pipe, it uses a refillable internal reservoir. This is ideal if your fridge is on an island wall or a long way from the nearest pipework, or if you’re in a rental property where plumbing changes aren’t practical.
Smart connectivity
The RQ758N4SASE keeps things straightforward, but Wi‑Fi‑equipped siblings like the RQ758N4SWSE or the black stainless steel Hisense PureFlat Infinite RQ758N4SWFE go a bit further. Smart features typically let you tweak temperatures from your phone, receive door‑left‑open alerts and sometimes monitor energy use. They won’t transform your life, but if you’re building a connected home or you’re forgetful with doors, they can be handy extras.
Choosing between Hisense PureFlat models
If you’ve settled on the PureFlat look but you’re not sure which exact model is right, it helps to think about three key questions: do you want Wi‑Fi, do you want a water dispenser, and do you prefer stainless steel or a darker finish?
- Hisense PureFlat Infinite RQ758N4SASE – Stainless steel, Total No Frost, E rated, clean flat-front design with a focus on core storage and cooling. A good choice if you don’t need water dispensing or smart features.
- Hisense PureFlat Infinite RQ758N4SWSE – Similar styling but adds Wi‑Fi connectivity and a non-plumbed water dispenser. Ideal if you’d like chilled water on tap without plumbing work.
- Hisense PureFlat Infinite RQ758N4SWFE – Black stainless steel finish with Wi‑Fi and Total No Frost. A strong option if you prefer a darker, more dramatic look that matches black ovens or hobs.
All three share the same broad design philosophy. The differences mainly come down to finish and features around the edges, so it’s worth considering what you’ll actually use day‑to‑day before paying extra.
When to consider Haier as an alternative
Hisense isn’t your only option for a large, feature‑rich American fridge freezer. Haier’s multi-door range is very competitive and often comes in at a similar price point.
The Haier FD 70 Series 5 HFR5719ENMG is a Frost Free American fridge freezer with an E rating and a stainless steel look, aimed at buyers who like a slightly narrower footprint but still want serious storage. Meanwhile, the Haier HFR5719EWMP adds a non-plumbed water dispenser and Total No Frost cooling in a smart silver finish.
Haier models are well worth a look if:
- Your kitchen space is tight and you need a slimmer cabinet width.
- You want a specific mix of water dispenser, no‑frost technology and finish that’s easier to find in their line‑up.
- You’re comparing deals and see a particularly strong price on a Haier model vs a Hisense.
Practical tips for living with a large American fridge freezer
However carefully you choose your model, a bit of forethought in day‑to‑day use makes a huge difference. Here are some practical tips that work particularly well with four-door designs like the RQ758N4SASE.
Organise zones logically
Use the wide upper shelves for the food you reach for all the time: milk, juices, spreads and leftovers. Reserve one shelf for raw meat and fish in sealed containers so any drips are contained, and use the crisper drawers for fruit and veg that benefit from higher humidity.
In the freezer sections, group similar items together: one drawer for meats, one for vegetables, one for prepared meals and one for bread and desserts. Clear labelling and first‑in, first‑out rotation will help you actually use what you buy.
Keep doors and seals in good condition
Big doors mean heavier wear on hinges and seals. Get into the habit of wiping seals with a soft, damp cloth every few weeks to remove crumbs and sticky spills. If a door doesn’t close as easily as it once did, check that nothing inside is obstructing it before assuming anything more serious is wrong.
Clean gently but regularly
For interior shelves and drawers, a mild solution of warm water and a little washing‑up liquid is usually all you need. Avoid harsh chemicals and abrasive pads, especially on stainless steel finishes like the RQ758N4SASE. For the exterior, follow the manufacturer’s care advice; many stainless doors look best when cleaned with a soft microfibre cloth, wiping in the direction of the grain.
Noise, placement and open-plan living
Most modern American fridge freezers, including the Hisense PureFlat range and the Haier models mentioned, are designed with quiet operation in mind. You’ll still hear the compressor from time to time, but it shouldn’t dominate a normal kitchen buzz.
To keep things as quiet and efficient as possible:
- Ensure the appliance is level using the adjustable feet.
- Avoid placing it right up against a side wall where vibrations can transfer more easily.
- Leave the recommended ventilation gaps so the compressor doesn’t overwork.
If your kitchen and living room share one big open space, it can be worth checking the quoted noise level (dB) in our individual product reviews when you’re comparing similar models.
Price, value and when to upgrade
American fridge freezers, particularly stylish four-door designs, are a serious investment. The Hisense PureFlat Infinite RQ758N4SASE sits in the competitive mid‑range: not a budget model, but often more affordable than ultra‑premium brands while still delivering the essentials most households want.
You might consider upgrading if:
- Your current fridge freezer is over a decade old and struggling to maintain temperature.
- You’re constantly short of space for fresh food or frozen batch‑cooked meals.
- Your kitchen renovation calls for a more integrated look, with a flat‑front stainless or black stainless finish.
Before taking the plunge, it’s worth spending a few minutes comparing like‑for‑like models: the core PureFlat RQ758N4SASE, the Wi‑Fi and water‑equipped Hisense variants, and the similarly‑priced Haier alternatives. That way you can be confident you’re paying for features you’ll actually appreciate.
Final thoughts
A large American fridge freezer can transform how you shop, cook and store food. The Hisense PureFlat Infinite RQ758N4SASE offers exactly what many families are looking for: masses of room, a smart stainless steel finish and low‑maintenance Total No Frost cooling, without forcing you into plumbing or complex installation.
If you’re close to a decision, it’s worth taking a detailed look at the real‑world pros and cons of this model in our in‑depth write‑up – you can read the full Hisense PureFlat Infinite RQ758N4SASE review here. And if you’d like to compare similar layouts, features and finishes, don’t forget to explore the linked Hisense and Haier alternatives above so you can choose the fridge freezer that genuinely suits your kitchen and your lifestyle.