Daikin FVXM 3.5 kW (FVXM35FV1B9 / RXTP35N) — will it pass the neighbour noise test?
At 3 m from your neighbour's window it gives ≈43.5 dB(A) — over England's 37 dB(A) limit; at 5 m it is still over (≈39.0). Manufacturer-declared 61 dB(A) LwA (the manufacturer's outdoor sound-power number), 1 dB quieter than the median 3.5 kW unit (587 families). £ per summer ≈£64.65 at 400 hours and 26.32p/kWh (estimated from 3.5 kW ÷ SEER (summer cooling efficiency; higher uses less electricity) 5.7). At 200 hours ≈£32.32, at 800 hours ≈£129.29.
fail
Already calculated for one unit, Q=2 (sound spreading from a unit stood against a wall), no barrier
- 1 m · ≈53.0 dB(A) · fail
- 3 m · ≈43.5 dB(A) · fail
- 5 m · ≈39.0 dB(A) · fail · within 2.0 dB
- 8 m · ≈35.0 dB(A) · pass · within 2.0 dB
- 12 m · ≈31.4 dB(A) · pass
| Distance | Q=2 dB(A) | Q=2 verdict | Within 2.0 dB | Q=4 dB(A) | Q=4 verdict |
|---|---|---|---|---|---|
| 1 | 53.0 | fail | no | 56.0 | fail |
| 3 | 43.5 | fail | no | 46.5 | fail |
| 5 | 39.0 | fail | yes | 42.0 | fail |
| 8 | 35.0 | pass | yes | 38.0 | fail |
| 12 | 31.4 | pass | no | 34.4 | pass |
| Scotland 1 m | 54 | fail | no | — | Scottish legal point is 1 m, so Q=4 is not a second legal column here |
EPREL https://eprel.ec.europa.eu/screen/product/airconditioners/232427 · 2026-09-25 · n=2 · MCS 020a Issue 1.1 inverse-square formula via contract_engine, Q given, barrier none · updated 2026-09-25 · version 1.0.0 · CSV of the values on this page · class MOD-C02
MCS-020A-STEP8 · §3.2 Step 8 · checked 2026-09-25. 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 Source
Full engine wording and the measurement caveat
≈43.5 dB(A) at the assessment position (estimated by the MCS 020a method, manufacturer-declared LwA; not a measured level, proof of permitted development, or a guarantee against nuisance).
What cooling capacity is registered for this family?
Daikin FVXM 3.5 kW (FVXM35FV1B9 / RXTP35N) is registered at 3.5 kW cooling design load (EPREL, manufacturer-declared, checked 2026-09-25). A room-area conversion is not on file: this build does not apply an uncited floor-area rule.
computed
| Field | Value | Status |
|---|---|---|
| Cooling design load, kW | 3.5 | manufacturer-declared |
EPREL https://eprel.ec.europa.eu/screen/product/airconditioners/232427 · n=2 · value copied from the EPREL family row; no floor-area rule applied · same check date as the first block · CSV of the values on this page · class unmatched
Full engine wording and the measurement caveat
not a measured level, proof of permitted development, or a guarantee against nuisance
Do I need planning permission for this family in England, Wales or Scotland?
Class G (the England and Wales rule for a heat-pump outdoor unit) is not a yes from the model card alone. Product class is a2a-reversible. On a house in England the outdoor unit has to be under 1.5 m³, meet 37 dB at the neighbour's window and stay off a road-facing wall in a conservation area; a block of flats is one unit up to 0.6 m³ (Class G as amended 29 May 2025, checked 25 Sep 2026). The address, the volume and the wall are what the planning check still needs. In Northern Ireland the outdoor unit is Class G of SR 2015/70 as substituted by SR 2023/95: a dwellinghouse, used to provide heat, and MCS 020 Issue 1.3 (42 dB(A)), not the England 37 dB figure.
address not supplied
| Nation | Result | Still to enter | Cited point |
|---|---|---|---|
| England | not supplied | address, volume and wall still to enter | Class G, permitted development |
| Wales | not supplied | address, volume and wall still to enter | Class G, permitted development |
| Scotland | not supplied | address, volume and wall still to enter | Class 6H (Scotland's rule for a heat pump used for heating)(1) |
| Northern Ireland | not supplied | address, volume and wall still to enter | Class G |
https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14 · n=2 · evaluate_pd with building, volume, noise and siting still to enter · same check date as the first block · CSV of the values on this page · class PLN-C06
ENG-02 · G.1. Development is not permitted by Class G unless the air source heat pump complies with the MCS Planning Standards. Source
Full engine wording and the measurement caveat
not a measured level, proof of permitted development, or a guarantee against nuisance
£ per summer at the price-cap tariff
£ per summer ≈£64.65 at 400 hours and 26.32p/kWh (estimated from 3.5 kW ÷ SEER 5.7). At 200 hours ≈£32.32, at 800 hours ≈£129.29. Electrical draw ≈0.614 kW, estimated from 3.5 kW ÷ SEER 5.7, tariff 26.32p/kWh (Ofgem price cap, 2026-10-01 to 2026-12-31, checked 2026-09-25). The hours are a scenario, not a measured summer.
computed
| Quantity | Value | Unit |
|---|---|---|
| SEER | 5.7 | ratio |
| Design load | 3.5 | kW |
| Electrical draw | 0.614 | kW |
| £ per summer, 200 h | £32.32 | GBP |
| £ per summer, 400 h | £64.65 | GBP |
| £ per summer, 800 h | £129.29 | GBP |
EPREL https://eprel.ec.europa.eu/screen/product/airconditioners/232427 · n=2 · kWh per hour ≈ design load ÷ SEER; not a measured bill · same check date as the first block · CSV of the values on this page · class unmatched
Full engine wording and the measurement caveat
not a measured level, proof of permitted development, or a guarantee against nuisance
What unit price was observed?
No dated unit price is stored for Daikin FVXM 3.5 kW (FVXM35FV1B9 / RXTP35N). Price status: not on file. A median is not published from a missing price.
not on file
| Retailer | Price GBP | Observed | SKU |
|---|---|---|---|
| not on file | not on file | not on file | not on file |
no retail observation · n=2 · price copied from unit_prices_observed.csv; no inferred street price · same check date as the first block · CSV of the values on this page · class MOD-C10
Full engine wording and the measurement caveat
not a measured level, proof of permitted development, or a guarantee against nuisance
Does the £2,500 air-to-air grant attach to this family?
England and Wales: not supplied. £2,500 for air-to-air heat pumps (AAHP) (in residential properties only) (p.6 summary table, checked 2026-09-25). Scotland: no. We will not cover: … Air to air heat pumps. (eligible costs, air-to-water/ground/water-to-water heat pump section, checked 2026-09-25). Northern Ireland: no. Only properties located in England and Wales are eligible for BUS funding. (§3.28, checked 2026-09-25). Home inputs that the engine still needs are listed with the verdict, not assumed.
not supplied
| Nation | Eligible | Wording |
|---|---|---|
| England | not supplied | Cannot determine BUS eligibility — property_type is not known. |
| Wales | not supplied | Cannot determine BUS eligibility — property_type is not known. |
| Scotland | no | Home Energy Scotland's grant and loan scheme does not cover air-to-air heat pumps ('We will not cover: ... Air to air heat pumps.'). |
| Northern Ireland | no | Only properties located in England and Wales are eligible for BUS funding (Ofgem Boiler Upgrade Scheme installer guidance v5.1, §3.28). The £2,500 grant does not apply in Northern Ireland. |
https://www.ofgem.gov.uk/sites/default/files/2026-07/boiler_upgrade_scheme_guidance_for_installers_v5.1_20260630135616-20260701135531.pdf · n=2 · evaluate_grant; property type still to enter; Scotland uses technology air_to_air only for air-to-air classes · same check date as the first block · CSV of the values on this page · class unmatched
BUS-amount · p.6 summary table. £2,500 for air-to-air heat pumps (AAHP) (in residential properties only) Source
Full engine wording and the measurement caveat
not a measured level, proof of permitted development, or a guarantee against nuisance
Which refrigerant is registered?
Registered refrigerant: R-32, GWP (how strongly the refrigerant warms the climate) 675 (EPREL, manufacturer-declared, checked 2026-09-25). No extra hazard class is added here beyond the registration.
computed
| Field | Value |
|---|---|
| Refrigerant | R-32 |
| GWP | 675 |
EPREL https://eprel.ec.europa.eu/screen/product/airconditioners/232427 · n=2 · copied from the EPREL family row · same check date as the first block · CSV of the values on this page · class unmatched
Full engine wording and the measurement caveat
not a measured level, proof of permitted development, or a guarantee against nuisance
Next steps for this model
Better than a bare specification row: the neighbour-window distance is scored pass or fail against the MCS limit, with the clause and the check date.
Report an error on this page
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