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60 lines
2.3 KiB
Python
60 lines
2.3 KiB
Python
from backend.Property import Property
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class DraughtProofingRecommendations:
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def __init__(self, property_instance: Property):
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self.property = property_instance
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self.recommendation = []
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def recommend(self):
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"""
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In some cases, we can identify the need for draught proofing from the EPC recommendations, however the initial
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implementation of this class will just assume that we are picking up a non-invasive recommendation from the
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survey
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"""
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# For the moment, draught proofing doesn't have a phase impact
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draught_proofing_recommendation_config = next(
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(r for r in self.property.non_invasive_recommendations if
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r["type"] == "draught_proofing"),
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{}
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)
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if not draught_proofing_recommendation_config:
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return
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# Cost is based on a £50 cost per window, based on Checkatrade
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cost = draught_proofing_recommendation_config.get("cost", self.property.number_of_windows * 50)
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description = (
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"Draught proof doors and windows to improve energy efficiency" if
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not draught_proofing_recommendation_config.get("description")
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else draught_proofing_recommendation_config["description"]
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)
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# We recommend installing two mechanical ventilation systems
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self.recommendation = [
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{
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"phase": None,
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"parts": [],
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"type": "draught_proofing",
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"measure_type": "draught_proofing",
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"description": description,
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"starting_u_value": None,
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"new_u_value": None,
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"already_installed": False,
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"sap_points": draught_proofing_recommendation_config["sap_points"],
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"heat_demand": 0,
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"kwh_savings": 0,
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"co2_equivalent_savings": 0,
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"energy_cost_savings": 0,
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"total": cost,
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# We use a very simple and rough estimate of 4 hours per unit
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"labour_hours": draught_proofing_recommendation_config.get("labour_hours", 8),
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"labour_days": draught_proofing_recommendation_config.get("labour_days", 1), # Assume 8 hour day
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"survey": True
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}
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]
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