Updated 20 Jul 2017

Mitsubishi Heavy Industries

SRF25ZMXA-S

Snapshot: The Mitsubishi Heavy Industries SRF25ZMXA-S is a 3.4kW floor mounted heat pump. But how efficient is it at heating your home?

SRF25ZMXA-S
Consumer score
SCORE
Avg price

POA

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Test results

Overall score
68
Heating efficiency
?/10
Cooling efficiency
?/10
Indoor noise
?/10
Outdoor noise
?/10

Good points

  • Good heating efficiency.
  • Good cooling efficiency.
  • Quiet outdoor unit.
  • 7-day timer included.
  • Wi-Fi control available as paid extra.
  • 24-hour timer included.

But

  • Below-average brand reliability means we can't recommend this model.
  • No Energy Star.
  • No low-temperature performance data available.

Our assessment

POA = price on application. Some manufacturers don't supply RRPs for their heat pumps, citing the wide variation in installation costs depending on location of indoor and outdoor units. For these brands, prices (unit+installation) are only available from brand-accredited installers, who will usually provide a free, no-obligation quote.

Before using our database to choose the right model for your home, it’s essential to work out the required heating capacity (kW) for your home. The best way to do this is to use our calculator or enlist the services of an experienced heat pump installer. A top-scoring model won’t be able to keep your home at a healthy temperature if it’s too small for the job.

Smaller heat pumps are more efficient than bigger ones. Our scores take this into account, so a model that scores highly for heating efficiency will have a COP that’s higher than average for a model of its size. A score of 7.0 indicates the average result for a model of that heating capacity (kW). The same applies for noise scores, so a large model scoring 7.0 for indoor noise will be louder than a small model which also scored 7.0 – use the dBA figures if you want to know how models of different sizes compare.

Our low-temperature performance score is based on the difference between the standard kW heating capacity (measured at 7°C) and output at 2°C (the H2 rating), the prime temperature for frost formation. It also considers whether the model’s earned the Energy Star mark, which requires heat pumps to demonstrate efficient low-temperature performance.

Key data

Model

Size
Small
Avg price
POA
Running cost (/year)
$282
Style
Floor mounted

Brand survey results

Brand reliability (%)
84%
Brand satisfaction (% 'excellent')
77%

Performance (claimed)

Heating capacity (kW)
3.4
Heating capacity at 2°C (kW)
ns
Cooling capacity (kW)
2.5
Heating COP
4.7
Cooling EER
4.8

Energy use ratings

Heating stars
★★★★☆☆
Cooling stars
★★★★☆☆
Energy Star
No

Specifications

Capacity (kW)
3.4
Refrigerant
R410A
Noise inside (dBA)
40
Noise outside (dBA)
47
Dimensions - inside unit (H x W x D, cm)
60 x 86 x 24
Lowest claimed operating temperature (°C)
-15

Features

Number of fan speeds
4
24 hour timer
7 day timer
Yes
Wi-Fi
Yes (paid extra)

More Info

Notes

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