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25
October
2024
Updated
27
October
2024

Grant Heat Pump Review

All the Grant Aerona Heat Pumps in a row alongside each other

What You Need To Know About Grant Heat Pumps

Grant is a leading manufacturer of heating systems in the UK, featured on our list of the “Best Air Source Heat Pump Brands”. And if you jump onto Trustpilot, you’ll see 78% of customer’s reviews are rated 5 star!

Grant’s air source heat pump range includes the Aerona³ R32 and Aerona R290. Size wise, they’re available in outputs from 4kW-17kW; suitable for the majority of residential properties. 

Efficiency (and therefore, cash savings on energy bills) is up there with the very best. Whilst the average heat pump is around 300% efficient, the Grant Aerona³ R32 is 434% efficient when operating at 35°C.

Typical installation costs sit in the £10,000-£15,000 range (property dependent). Although when using a MCS installer, you'll be eligible for £7,500 in funding via the Boiler Upgrade Scheme. 

Grant is known for their reliability, so expect the lifespan of your air source heat pump to be in excess of 15-years. It will come with a long warranty of 7-years, much better than the average manufacturer’s warranty.

Get quotes on a Grant air source heat pump using our clickable heat pump tool here

Our Grant Heat Pump Review

Below, we’ve covered Grant air source heat pumps (ASHPs) in detail. 

In our review we’ll cover everything from: if Grant is a good ASHP brand, to installation costs and the top features of their range. 

Is Grant A Good ASHP Brand?

Grant UK is a popular UK manufacturer of underfloor heating systems, oil boilers, cylinders, solar thermal and of course, air source heat pumps. 

Go into any popular UK plumbing and heating merchant and it’s likely they’ll have products on offer from Grant UK. They’re known for offering long warranties, excellent after-sales care and products across a range of heating systems that are incredibly reliable.

We featured Grant UK on our list of the best air source heat pump brands, alongside the likes of: Vaillant, Samsung and Ideal Heating.

Current ASHP Product Range

(Source: Grant UK)

The Grant air source heat pump range is limited to two models: 

  • Aerona³ R32
  • Aerona R290

R32 and R290 are the types of refrigerants used in these pumps. The type of refrigerant used doesn't just affect the efficiency of an ASHP, it also alters its environmental impact. 

An easy way to see just how little these refrigerants affect the environment is by looking at their GWP (Global Warming Potential). And we can use R410A as a baseline; another type of refrigerant used in ASHPs.

GWP ratings:

  • R410A: 2,088
  • R32: 675
  • R290: 6

So, if you're looking to reduce your environmental impact, choosing an R290 heat pump is the way to go! 

You can read more about R290 and R32 refrigerants here. Or, get fixed prices on-screen for a range of highly efficient heat pumps by using our clickable tool here

What Size Grant Heat Pump Do You Need?

(Source: Grant UK)

The Aerona³ R32 is available in 6kW, 10kW, 13kW and 17kW outputs. Depending on your exact heat demand, that's going to cover properties from a small 2-bed up to a large 5-bed. 

The Aerona R290 is available in outputs of 4kW, 6.5kW and 9kW, so is suited to small-mid range properties.

Picking an air source heat pump that's exactly spec'd to your heat demand is going to result in a reduction in energy bills. 

You definitely don't want a pump that's being overworked (because it's too small), or not working hard enough (you'll have paid £1000s extra for a large pump that's not needed).

We’ve written a detailed guide to heat pump sizing here. 

Alternatively, use our heat pump configuration tool, that will suggest the most suitably sized pump from a leading brand from the likes of Grant, Vaillant, Ideal or Samsung. 

Warranty

Warranty is one of the most important things to consider when investing in a heat pump. They're expensive to fix, so you'll want to be covered for as long as possible. 

Grant UK offers a 7-year warranty on both the Aerona³ R32 and the Aerona R32. 

In comparison, you'll find many manufacturers of air source heat pumps offer just 3-5 years. At the lower end of that range (3-years), there isn't enough coverage to be spending thousands on a heat pump.

It's worth noting, to get the 7-warranty you'll need to use a G1 Installer. G1 Installers have undergone training directly from Grant UK.

Awards & Accreditations

Grant's air source heat pump range has a raft of awards and accreditations which is a testament to the quality of their R&D, as well as their end product.

These include the likes of: 

  • Quiet Mark
  • National Heat Pump Awards Finalist
  • MCS Certified
  • Key Mark
  • Renewable Energy Consumer Code

Efficiency

Energy efficiency should be a focal point when buying a heat pump. Afterall, you're investing in a heat pump to save on your energy bills, but to help the environment too.  

Both the Aerona R290 and the Grant Aerona³ R32 benefit from an A+++ rating for central heating. But a good way to figure out exactly how efficient they are is to explore their SCOP rating.

SCOP (Seasonal Coefficient of Performance) is a way to measure the seasonal efficiency of an air source heat pump. A SCOP rating of 1 means a unit would generate 1kWh of heat for every 1kWh of electricity it consumes, and would be 100% efficient. 

Typical values for air source heat pumps sit in the 2.5-3 range; meaning they are usually 250-300% efficient. In comparison, a new A-rated gas boiler is generally around 94% efficient (that’s a SCOP rating of 0.94).

Taking the Grant Aerona³ R32 for examples sake, it has the following SCOP ratings: 

  • 4.34 at 35°C
  • 4.04 at 40°C
  • 3.75 at 45°C
  • 3.45 at 50°C

This is up there with some of the most efficient air source heat pumps available in the UK. 

That said, it's not the absolute best. If we look at the Ideal Logic Air 8kW, this has a SCOP of 5.09 when operating at 35°C!

We cover the Ideal Logic Air here. And you can get fixed prices on the most efficient air source heat pump for your property using our heat pump configuration tool here

The Cost of Grant Air Source Heat Pumps

There are dozens of factors that determine the exact installation cost of your Grant air source heat pump. The two biggest tend to be job complexity and the size of heat pump you need. 

The difference between a small heat pump could be £3,000+ in comparison to a large one. For instance a 6kW Grant Aerona³ R32 with a suitable cylinder is likely to cost around £7,000 (excluding installation costs). A 17kW, is likely to be £10,000 or more. 

A screenshot from the Dwellow website of the dwellow website showing Grants available via the Boiler Upgrade Scheme

The total price including installation for the units above could be £10,000-£15,000; a huge difference. 

That said, remember that Grant air source heat pumps are eligible for government funding. 

We’ve written a full guide to ASHP grants here, but in summary: 

  • When fitted by an MCS installer, you’ll be eligible for a £7,500 discount on your air source heat pump
  • Secondhand heat pumps and those not fitted by an MCS installer won’t be eligible
  • With the £7,500 discount applied, your installation cost will be comparable to that of a gas boiler

At Dwellow, all of our ASHP engineers are MCS registered, so your heat pump will be eligible for £7,500 in funding. 

You can get an exact price for Grant ASHPs and other leading brands using our heat pump quotation tool here.

Or, jump over to our guide covering heat pump fitting costs here. 

Grant Heat Pump Reviews Online

As with any brand you’re planning to buy from, it’s worth looking at online reviews and customer testimonials. 

The best place to do that? Trustpilot. 

As you can see from the image below, Grant UK gets 4.1 of 5 stars on average, with a massive 78% of customers giving them 5 stars. 

A screenshot of Trust Pilot review of Grant UK
(Source: Trustpilot)

This is comparable to leading heat pump manufacturers such as Vaillant and Ideal Heating.

Whilst we mention warranty as being one of the single most important factors when choosing a heat pump, that’s no good without excellent after-sales care. After purchasing a Grant heat pump, you’ll need to deal with their customer service team if there’s a problem. 

Thankfully, they’re known for being incredibly reliable and quick to act when there’s an issue:

A screenshot of a Grant heat pump review from Trustpilot

How Long Will A Grant Heat Pump Last?

Taking the Grant Aerona³ R32 ASHP as an example, you should expect it to last at least 15-years. 

However, this lifespan is only to be expected if you have it regularly serviced; once annually is the most common service interval for heat pumps. 

Heat pump servicing includes checking electrical connections, refrigerant levels and most importantly, cleaning the fan blades.

Jump over to our heat pump configuration tool, that will determine the best brand and model of heat pump for your property. All heat pumps we install are eligible for the £7,500 Boiler Upgrade Scheme grant!

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