Foursun FAC (F-A/C01-12V / FAC0112V) — will it pass the neighbour noise test?
At 3 m from your neighbour's window it gives ≈22.5 dB(A) — under England's 37 dB(A) limit; at 5 m it passes (≈18.0). Manufacturer-declared 40 dB(A). £ per summer is not scored: this registration has no cooling capacity and no SEER to divide it by. Tariff on file is 26.32p/kWh.
pass
Already calculated for one unit, Q=2, no barrier
- 1 m · ≈32.0 dB(A) · pass
- 3 m · ≈22.5 dB(A) · pass
- 5 m · ≈18.0 dB(A) · pass
- 8 m · ≈14.0 dB(A) · pass
- 12 m · ≈10.4 dB(A) · pass
| Distance | Q=2 dB(A) | Q=2 verdict | Within 2.0 dB | Q=4 dB(A) | Q=4 verdict |
|---|---|---|---|---|---|
| 1 | 32.0 | pass | no | 35.0 | pass |
| 3 | 22.5 | pass | no | 25.5 | pass |
| 5 | 18.0 | pass | no | 21.0 | pass |
| 8 | 14.0 | pass | no | 17.0 | pass |
| 12 | 10.4 | pass | no | 13.4 | pass |
| Scotland 1 m | 41 | pass | yes | — | 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/2846465 · 2026-09-25 · n=1 · 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-C01
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
≈22.5 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?
Cooling capacity for Foursun FAC (F-A/C01-12V / FAC0112V) is pending_data — the EPREL row has no design load.
pending_data
| Field | Value | Status |
|---|---|---|
| Cooling design load, kW | pending_data | pending_data |
EPREL https://eprel.ec.europa.eu/screen/product/airconditioners/2846465 · 2026-09-25 · n=1 · value copied from the EPREL family row; no floor-area rule applied · updated 2026-09-25 · version 1.0.0 · 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 is not a yes from the model card alone. Product class is portable1. 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.
address not supplied
| Nation | Result | Still to enter | Cited point |
|---|---|---|---|
| England | not_run | product class is not an outdoor air-source heat pump | Class G, permitted development |
| Wales | not_run | product class is not an outdoor air-source heat pump | Class G, permitted development |
| Scotland | not_run | product class is not an outdoor air-source heat pump | Class G, permitted development |
https://www.legislation.gov.uk/uksi/2015/596/schedule/2/part/14 · 2026-09-25 · n=1 · evaluate_pd with building, volume, noise and siting left unknown · updated 2026-09-25 · version 1.0.0 · CSV of the values on this page · class PLN-C06
ENG-02 · G.1 · checked 2026-09-25. 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 is not scored: this registration has no cooling capacity and no SEER to divide it by. Tariff on file is 26.32p/kWh.
not supplied
| Quantity | Value | Unit |
|---|---|---|
| SEER | not on the registration | ratio |
| Design load | not on the registration | kW |
| Electrical draw | not scored | kW |
| £ per summer, 200 h | not scored | GBP |
| £ per summer, 400 h | not scored | GBP |
| £ per summer, 800 h | not scored | GBP |
EPREL https://eprel.ec.europa.eu/screen/product/airconditioners/2846465 · 2026-09-25 · n=1 · kWh per hour ≈ design load ÷ SEER; not a measured bill · updated 2026-09-25 · version 1.0.0 · 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 Foursun FAC (F-A/C01-12V / FAC0112V). Price status: pending_data. A median is not published from a missing price.
pending_data
| Retailer | Price GBP | Observed | SKU |
|---|---|---|---|
| pending_data | pending_data | pending_data | pending_data |
no retail observation · 2026-09-25 · n=1 · price copied from unit_prices_observed.csv; no inferred street price · updated 2026-09-25 · version 1.0.0 · 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: not supplied. 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). 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 | not supplied | Cannot determine Home Energy Scotland eligibility without knowing the heat pump technology. |
https://www.ofgem.gov.uk/sites/default/files/2026-07/boiler_upgrade_scheme_guidance_for_installers_v5.1_20260630135616-20260701135531.pdf · 2026-09-25 · n=1 · evaluate_grant; property_type left unknown; Scotland uses technology air_to_air only for air-to-air classes · updated 2026-09-25 · version 1.0.0 · CSV of the values on this page · class unmatched
BUS-amount · p.6 summary table · checked 2026-09-25. £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: R134a, GWP 1430 (EPREL, manufacturer-declared, checked 2026-09-25). No extra hazard class is added here beyond the registration.
computed
| Field | Value |
|---|---|
| Refrigerant | R134a |
| GWP | 1430 |
EPREL https://eprel.ec.europa.eu/screen/product/airconditioners/2846465 · 2026-09-25 · n=1 · copied from the EPREL family row · updated 2026-09-25 · version 1.0.0 · 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.