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Multi-splits for 2 rooms at 6 kW (21,000 BTU) in the UK: 86 models

Daikin CTXM+FBA 6.5 kW (3MXM68A / CTXM15N2V1B) is the quietest of these 86 2-room multi-splits at ≈61.0 dB(A) outside. If one outdoor unit will serve 2 rooms, check the pass distance before the brand.

computed

bar · 6 kW (21,000 BTU) kW · Multi-split with 2 indoor units, quietest outside first · n=86 · 25 Sep 2026

Ranked models

86 models match this list. Multi-split with 2 indoor units, quietest outside first.

6 kW (21,000 BTU) · Multi-split with 2 indoor units, quietest outside first. £ per summer uses 26.32p/kWh at 400 hours.
RankModelLwA dB(A)3 m dB(A)SEER£ at 400 hRefrigerantObserved price
1Daikin CTXM+FBA 6.5 kW (3MXM68A / CTXM15N2V1B)61.043.55.8£117.99R32—
2Daikin CTXM+FBA 6.5 kW (3MXM68A / CTXM15N2V1B)61.043.57.0£97.76R32—
3Daikin CTXM+FBA 6.5 kW (3MXM68N / CTXM15M2V1B)61.043.57.0£97.76R32—
4Daikin CTXM+FBA 6.5 kW (3MXM68N / CTXM15M2V1B)61.043.55.8£117.99R32—
5Daikin CTXM+FBA 6.5 kW (4MXM68A / CTXM15R5V1B)61.043.55.6£122.20R32—
6Daikin CTXM+FBA 6.5 kW (4MXM68A / CTXM15R5V1B)61.043.56.7£102.14R32—
7Daikin CTXM+FBA 6.5 kW (4MXM68N / CTXM15M2V1B)61.043.55.6£122.20R32—
8Daikin CTXM+FBA 6.5 kW (4MXM68N / CTXM15M2V1B)61.043.56.7£102.14R32—
9Daikin CTXM+FBA 6.5 kW (5MWXM68A / CTXM15R2V1B)61.043.55.6£122.20R32—
10Daikin CTXM+FBA 6.5 kW (5MWXM68A / CTXM15R2V1B)61.043.56.5£105.28R32—
11Daikin CTXM+FDXM 6.5 kW (2MXM68A)61.043.55.8£117.99R32—
12Daikin CTXM+FDXM 6.5 kW (3MXM68A)61.043.56.0£114.05R32—
13Daikin CTXM+FDXM 6.5 kW (3MXM68N)61.043.56.0£114.05R32—
14Daikin CTXM+FDXM 6.5 kW (4MXM68A)61.043.55.8£117.99R32—
15Daikin CTXM+FDXM 6.5 kW (4MXM68N)61.043.55.8£117.99R32—
16Daikin CTXM+FDXM 6.5 kW (5MWXM68A)61.043.55.9£115.99R32—
17Daikin CTXM+FTXM 6.5 kW (2MXM68A)61.043.56.8£100.64R32—
18Daikin CTXM+FTXM 6.5 kW (2MXM68N)61.043.57.8£87.73R32—
19Daikin CTXM+FTXM 6.5 kW (3MXM68A / CTXM15N2V1B)61.043.56.8£100.64R32—
20Daikin CTXM+FTXM 6.5 kW (3MXM68A / CTXM15N2V1B)61.043.57.8£87.73R32—
21Daikin CTXM+FTXM 6.5 kW (3MXM68A / CTXM15R2V1B)61.043.57.9£86.62R32—
22Daikin CTXM+FTXM 6.5 kW (3MXM68N / CTXM15M2V1B)61.043.57.9£86.62R32—
23Daikin CTXM+FTXM 6.5 kW (3MXM68N / CTXM15M2V1B)61.043.57.9£86.62R32—
24Daikin CTXM+FTXM 6.5 kW (3MXM68N / CTXM15M2V1B)61.043.57.8£87.73R32—
25Daikin CTXM+FTXM 6.5 kW (3MXM68N / CTXM15N2V1B)61.043.57.9£86.62R32—
26Daikin CTXM+FTXM 6.5 kW (3MXM68N / CTXM15N2V1B)61.043.57.9£86.62R32—
27Daikin CTXM+FTXM 6.5 kW (3MXM68N / CTXM15N2V1B)61.043.56.8£100.64R32—
28Daikin CTXM+FTXM 6.5 kW (4MXM68A / CTXM15R2V1B)61.043.56.8£100.64R32—
29Daikin CTXM+FTXM 6.5 kW (4MXM68A / CTXM15R2V1B)61.043.57.9£86.62R32—
30Daikin CTXM+FTXM 6.5 kW (4MXM68A / CTXM15R2V1B)61.043.57.8£87.73R32—
31Daikin CTXM+FTXM 6.5 kW (4MXM68N / CTXM15M2V1B)61.043.57.9£86.62R32—
32Daikin CTXM+FTXM 6.5 kW (4MXM68N / CTXM15M2V1B)61.043.57.8£87.73R32—
33Daikin CTXM+FTXM 6.5 kW (4MXM68N / CTXM15M2V1B)61.043.57.9£86.62R32—
34Daikin CTXM+FTXM 6.5 kW (4MXM68N / CTXM15R2V1B)61.043.57.9£86.62R32—
35Daikin CTXM+FTXM 6.5 kW (4MXM68N / CTXM15R2V1B)61.043.57.9£86.62R32—
36Daikin CTXM+FTXM 6.5 kW (5MWXM68A / CTXM15R2V1B)61.043.57.3£93.74R32—
37Daikin CTXM+FTXM 6.5 kW (5MWXM68A / CTXM15R2V1B)61.043.56.9£99.18R32—
38Daikin CTXM+FTXM 6.5 kW (5MWXM68A / CTXM15R2V1B)61.043.57.3£93.74R32—
39Daikin FDXM+FTXJ 6.5 kW (3MXM68A)61.043.56.9£99.18R32—
40Daikin FDXM+FTXJ 6.5 kW (3MXM68N)61.043.56.9£99.18R32—
41Daikin FDXM+FTXJ 6.5 kW (4MXM68A)61.043.56.6£103.68R32—
42Daikin FDXM+FTXJ 6.5 kW (4MXM68N)61.043.56.6£103.68R32—
43Daikin FDXM+FTXP 6.5 kW (5MWXM68A)61.043.56.4£106.92R32—
44Daikin FDXM+FTXP 6.5 kW (5XXM68A)61.043.56.4£106.92R32—
45Daikin Perfera 6.5 kW (3MXM68A)61.043.57.8£87.73R32—
46Daikin Perfera 6.5 kW (3MXM68N)61.043.57.8£87.73R32—
47Daikin Perfera 6.5 kW (4MXM68A)61.043.57.8£87.73R32—
48Daikin Perfera 6.5 kW (4MXM68N)61.043.57.8£87.73R32—
49Daikin Perfera 6.5 kW (5MWXM68A)61.043.57.3£93.74R32—
50Toshiba RAS 6.5 kW (RAS-24E2AVG-E)61.043.56.9£99.18R32—
51Toshiba RASB 6.1 kW (RAS-22J2AVSG-E1)62.044.57.3£87.97R32—
52Hisense HC 6.2 kW (3AMW62U4RJC / HC25YC00G)63.045.57.0£93.25R32—
53Samsung AJ 6 kW (AJ068TXJ3KG)64.046.55.8£108.91R32—
54Bosch 7733701934 6.1 kW (2A27)66.048.57.9£81.29R32—
55Bosch 7733701934 6.1 kW (A7AC)66.048.58.0£80.28R32—
56Bosch 7733701934 6.1 kW (B71F)66.048.57.9£81.29R32—
57Bosch 7733701934 6.1 kW (9849)66.048.57.7£83.40R32—
58Bosch 7733701934 6.1 kW (03EB)66.048.57.8£82.33R32—
59Bosch 7733701934 6.1 kW (07FD)66.048.57.2£89.20R32—
60Bosch 7733701934 6.1 kW (3BA1)66.048.57.4£86.78R32—
61Bosch 7733701934 6.1 kW (5189)66.048.57.4£86.78R32—
62Bosch 7733701934 6.1 kW (BA57)66.048.57.2£89.20R32—
63Bosch 7733701934 6.1 kW (B94E)66.048.57.3£87.97R32—
64Bosch 7733701934 6.1 kW (D3B7)66.048.57.7£83.40R32—
65Bosch 7733701934 6.1 kW (CDA2)66.048.57.5£85.63R32—
66Bosch 7733701934 6.1 kW (6640)66.048.57.6£84.50R32—
67Bosch 7733701934 6.1 kW (96EC)66.048.57.3£87.97R32—
68Bosch 7733701934 6.1 kW (824D)66.048.57.6£84.50R32—
69Bosch 7733701934 6.1 kW (7733701941(2X))66.048.57.1£90.45R32—
70Bosch 7733701934 6.1 kW (7733701939(2X))66.048.57.0£91.74R32—
71Bosch 7733701934 6.1 kW (5944)66.048.57.0£91.74R32—
72Bosch 7733701934 6.1 kW (11B9)66.048.57.2£89.20R32—
73Bosch 7733701934 6.1 kW (A827)66.048.57.1£90.45R32—
74Bosch 7733701934 6.1 kW (1462)66.048.57.2£89.20R32—
75Bosch 7733701934 6.1 kW (5EA8)66.048.57.4£86.78R32—
76Bosch 7733701934 6.1 kW (8450)66.048.57.4£86.78R32—
77Bosch 7733701934 6.1 kW (C149)66.048.57.5£85.63R32—
78Bosch 7733701934 6.1 kW (EC61)66.048.57.4£86.78R32—
79Bosch 7733701934 6.1 kW (3184)66.048.57.2£89.20R32—
80Bosch 7733701934 6.1 kW (7C60)66.048.56.1£105.28R32—
81Bosch 7733703619 6.2 kW66.048.58.5£76.79R32—
82Argo ECOLIGHT 6.1 kW (ECOLIGHT24000UE)67.049.56.1£105.28R32—
83Gree GWH 6.1 kW (GWHD21NK6OO / GWH09AGCXB-K6DNA1G/I)68.050.57.5£85.63R32—
84Toshiba RASB 6.1 kW (RAS-22J2AVRG-E)68.050.56.8£94.44R32—
85Toshiba RAS 6.5 kW (RAS-24BAVG-E)70.052.56.1£112.18R32—
86Toshiba RAS 6.5 kW (RAS-24J2AVG-E)70.052.56.1£112.18R32—

EPREL manufacturer-declared registrations · snapshot 25 Sep 2026 · n=86 · Multi-split with 2 indoor units, quietest outside first; noise via contract_engine MCS 020a Q=2, no barrier · updated 25 Sep 2026 · version 1.0.0 · CSV of the values on this page

How this page was calculated

If the calculated sound pressure level at all assessment positions is equal to or lower than 37.0 dB(A) then the heat pump will comply with the Permitted Development noise limit

Better than a best-of roundup with no figures: every row is a registered number and a link to the model card.

Report an error in these figures