# Assumes that the average efficiency of an air source heat pump is 250%, taking the median of the 200-400% range,
# which is often quoted as a sensible efficiency range for air source heat pumps.
PESSIMISTIC_ASHP_EFFICIENCY = 200
AVERAGE_ASHP_EFFICIENCY = 250

# Conservative estimate of the proportion of electricity that will be consumed, whereas the rest will
# be exported
SOLAR_CONSUMPTION_PROPORTION = 0.5

# Typically, each solar panel takes up around 3.4 m2 of roof space under RdSAP. This was been verified in Elmhurst
RDSAP_AREA_PER_PANEL = 3.4

SOCIAL_TENURES = ["Rented (social)", "rental (social)"]

DESCRIPTIONS_TO_FUEL_TYPES = {
    "Air source heat pump, radiators, electric": {
        "fuel": "Electricity", "cop": AVERAGE_ASHP_EFFICIENCY / 100
    },
    "Boiler and radiators, mains gas": {"fuel": 'Natural Gas', "cop": 0.85},
    'Electric storage heaters': {"fuel": 'Electricity', "cop": 1},
    "Electric immersion, off-peak": {"fuel": 'Electricity', "cop": 1},
    "Electric storage heaters, radiators": {"fuel": 'Electricity', "cop": 1},
    "Room heaters, electric": {"fuel": 'Electricity', "cop": 1},
    "Electric immersion, standard tariff": {"fuel": 'Electricity', "cop": 1},
    "Portable electric heaters assumed for most rooms": {"fuel": 'Electricity', "cop": 1},
    "Boiler and radiators, LPG": {"fuel": 'LPG', "cop": 0.85},
    "Room heaters, dual fuel (mineral and wood)": {"fuel": 'Wood Logs', "cop": 1},
    "Room heaters, mains gas": {"fuel": 'Natural Gas', "cop": 0.85},
    "Warm air, mains gas": {"fuel": 'Natural Gas', "cop": 0.85},
    "Boiler, mains gas": {"fuel": 'Natural Gas', "cop": 0.85},
    "Gas multipoint": {"fuel": "Natural Gas", "cop": 0.85},
    "Warm air, Electricaire": {"fuel": "Electricity", "cop": 1},
    "Gas boiler/circulator": {"fuel": "Natural Gas", "cop": 0.85},
    "Boiler and underfloor heating, mains gas": {"fuel": "Natural Gas", "cop": 0.85},
    "No system present: electric heaters assumed": {"fuel": "Electricity", "cop": 1},
    "Electric instantaneous at point of use": {"fuel": "Electricity", "cop": 1},
    "Boiler and radiators, oil": {"fuel": "Oil", "cop": 0.85},
    "Electric storage heaters, Electric storage heaters": {"fuel": "Electricity", "cop": 1},
    "Boiler and radiators, electric": {"fuel": "Electricity", "cop": 0.85},
    "Gas boiler/circulator, no cylinder thermostat": {"fuel": "Natural Gas", "cop": 0.85},
    "Boiler and radiators, dual fuel (mineral and wood)": {"fuel": "Wood Logs", "cop": 0.85},
    "Electric immersion, standard tariff, plus solar": {"fuel": "Electricity + Solar Thermal", "cop": 1},
    "From main system, flue gas heat recovery": {"fuel": "Natural Gas", "cop": 0.85},
    "Electric underfloor heating": {"fuel": "Electricity", "cop": 1},
    "No system present: electric immersion assumed": {"fuel": "Electricity", "cop": 1},
    "Air source heat pump, underfloor, electric": {
        "fuel": "Electricity", "cop": AVERAGE_ASHP_EFFICIENCY / 100
    },
    "Gas instantaneous at point of use": {"fuel": "Natural Gas", "cop": 0.85},
    "Room heaters, wood logs": {"fuel": "Wood Logs", "cop": 1},
}