Division 1.5

United Kingdom

Please indicate the underlying dataset for the national building stock

Table 1

Reference building for existing buildings (major refurbishment)

For existing buildings	Building geometry^f1	Shares of window area on the building envelope and windows with no solar access	Floor area m² as used in building code	Description of the building^f2	Description of the average building technology^f3	Average energy performancekWh/m², a(prior to investment)	Component level requirements(typical value)
S/V (surface to volume), orientation, area of N/W/S/E facade.
Construction material, typical air tightness (qualitative), use pattern (if appropriate), age (if appropriate).
Technical building systems, U values of building elements, windows — area, U value, g value, shading, passive systems, etc.
(1) Single family buildings and subcategories
Subcategory 1
Subcategory 2 etc.
(2) Apartment blocks and multifamily buildings and subcategories

(3) Office buildings and subcategories

(4) Other non-residential building categories

Table 2

Reference building for new buildings

For new buildings	Building geometry^f4	Shares of window area on the building envelope and windows with no solar access	Floor area m² as used in building code	Typical energy performancekWh/m², a	Component level requirements
S/V, area of N/W/S/E facade. To note: the orientation of the building can already constitute an energy efficiency measure in itself in the case of new buildings.
(1) Single family buildings and subcategories
Subcategory 1
Subcategory 2 etc.
(2) Apartment blocks and multifamily buildings and subcategories

(3) Office buildings and subcategories

(4) Other non-residential building categories

Table 3

Example of a basic reporting table for energy performance relevant data

			Unit	Description
Calculation	method and tool(s)			short description of the calculation method adopted (e.g. with reference to EN ISO 13790) and comment on the calculation tool(s) used
Calculation	Primary energy conversion factors			values of delivered to primary energy conversion factors (per energy carrier) used for the calculation
Climate condition	location			name of the city with indication of latitude and longitude
	heating degree-days		HDD	to be evaluated according to EN ISO 15927-6, specifying the period of calculation
	cooling degree-days		CDD
	source of climatic dataset			provide references on climatic dataset used for the calculation
	terrain description			e.g. rural area, sub-urban, urban. Explain if the presence of nearby buildings has been considered or not
Building geometry	Length × Width × Height		m × m × m	related to the heated/conditioned air volume (EN 13790) and considering as ‘length’ the horizontal dimension of the façade south-oriented
	number of floors		—
	S/V (surface-to-volume) ratio		m²/m³
	ratio of window area over total building envelope area	South	%
		East	%
		North	%
		West	%
	orientation		°	azimuth angle of the South façade (deviation from the South direction of the ‘South’ oriented façade)
Internal gains	building utilisation			according to the building categories proposed in Annex 1 to Directive 2010/31/EU
	average thermal gain from occupants		W/m²
	specific electric power of the lighting system		W/m²	total electric power of the complete lighting system of the conditioned rooms (all lamps + control equipment of the lighting system)
	specific electric power of electric equipment		W/m²
Building elements	average U-value of walls		W/m²K	weighted U-value of all walls: U_wall = (U_wall_1 · A_wall_1 + U_wall_2 · A_wall_2 + … + U_wall_n · A_wall_n)/(A_wall_1 + A_wall_2 + … + A_wall_n); here are: U_wall_i = Uvalue of wall type i; A_wall_i = total surface of wall type i
	average U-value of roof		W/m²K	similar to walls
	average U-value of basement		W/m²K	similar to walls
	average U-value of windows		W/m²K	similar as for walls; it should take into account the thermal bridge due to the frame and dividers (according to EN ISO 10077-1)
	thermal bridges	total length	m
	thermal bridges	average linear thermal transmittance	W/mK
	thermal capacity per unit area	external walls	J/m²K	to be evaluated according to EN ISO 13786
		internal walls	J/m²K
		slabs	J/m²K
	type of shading systems			e.g. solar blind, roll-up shutter, curtain, etc.
	average g-value of	glazing	—	total solar energy transmittance of glazing (for radiation perpendicular to the glazing), here: weighted value according to the area of different windows (to be evaluated according to EN 410)
	average g-value of	glazing + shading	—	total solar energy transmittance for glazing and an external solar protection device has to be evaluated according to EN 13363-1/-2
	Infiltration rate (air changes per hour)		1/h	e.g. calculated for a pressure difference inside/outside of 50 Pa
Building systems	ventilation system	air changes per hour	1/h
	ventilation system	heat recovery efficiency	%
	efficiencies of heating system	generation	%	to be evaluated according to EN 15316-1, EN 15316-2-1, EN 15316-4-1, EN 15316-4-2, EN 15232, EN 14825, EN 14511
		distribution	%
		emission	%
		control	%
	efficiencies of cooling system	generation	%	to be evaluated according to EN 14825, EN 15243, EN 14511, EN 15232
		distribution	%
		emission	%
		control	%
	efficiencies of DHW system	generation	%	to be evaluated according to EN 15316-3-2, EN 15316-3-3
	efficiencies of DHW system	distribution	%	to be evaluated according to EN 15316-3-2, EN 15316-3-3
Building Setpoints and Schedules	temperature setpoint	winter	°C	indoor operative temperature
	temperature setpoint	summer	°C	indoor operative temperature
	humidity setpoint	winter	%	indoor relative humidity, if applicable: ‘Humidity has only a small effect on thermal sensation and perceived air quality in the rooms of sedentary occupancy’ (EN 15251)
	humidity setpoint	summer	%
	operation schedules and controls	occupancy		provide comments or references (EN or national standards, etc.) on the schedules used for the calculation
		lighting
		appliances
		ventilation
		heating system
		cooling system
Energy building need/use	(thermal) energy contribution of main passive strategies implemented	(1) …	kWh/a	e.g. solar greenhouse, natural ventilation, day-lighting, etc.
		(2) …	kWh/a
		(3) …	kWh/a
	energy need for heating		kWh/a	heat to be delivered to or extracted from a conditioned space to maintain the intended temperature conditions during a given period of time
	energy need for cooling		kWh/a
	energy need for DHW		kWh/a	heat to be delivered to the needed amount of domestic hot water to raise its temperature from the cold network temperature to the prefixed delivery temperature at the delivery point
	energy need for other (humidification, dehumidification)		kWh/a	latent heat in the water vapour to be delivered to or extracted from a conditioned space by a technical building system to maintain a specified minimum or maximum humidity within the space (if applicable)
	energy use for ventilation		kWh/a	electrical energy input to the ventilation system for air transport and heat recovery (not including the energy input for preheating the air) and energy input to the humidification systems to satisfy the need for humidification
	energy use for internal lighting		kWh/a	electrical energy input to the lighting system and other appliances/systems
	energy use for other (appliances, external lighting, auxiliary systems, etc.)		kWh/a
Energy generation at the building site	thermal energy from RES (e.g. thermal solar collectors)		kWh/a	energy from renewable sources (that are not depleted by extraction, such as solar energy, wind, water power, renewed biomass) or co-generation
	electrical energy generated in the building and used onsite		kWh/a
	electrical energy generated in the building and exported to the market		kWh/a
Energy consumption	delivered energy	electricity	kWh/a	energy, expressed per energy carrier, supplied to the technical building systems through the system boundary, to satisfy the uses taken into account (heating, cooling, ventilation, domestic hot water, lighting, appliances, etc.)
		fossil fuel	kWh/a
		other (biomass, district heating/cooling, etc.)	kWh/a
	primary energy		kWh/a	energy that has not been subjected to any conversion or transformation process

Annotations

Footnotes

f1: S/V (surface to volume), orientation, area of N/W/S/E facade.
f2: Construction material, typical air tightness (qualitative), use pattern (if appropriate), age (if appropriate).
f3: Technical building systems, U values of building elements, windows — area, U value, g value, shading, passive systems, etc.
f4: S/V, area of N/W/S/E facade. To note: the orientation of the building can already constitute an energy efficiency measure in itself in the case of new buildings.