1. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems Session B: Course recap and revision

2. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems Session B – course recap and revision During this session you will: Be briefed on the end of course assessment Revise topics covered throughout the course Complete practice calculations Have opportunities to ask about anything from the course you are unsure about Session objectives and activities

3. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems Session B – course recap and revision The end of course test is designed to confirm your knowledge of topics covered throughout the course. Keep calm and read each question carefully. We will review key points from the course today and go through some practice calculations. It is recommended that you complete additional revision outside of class. You may find it useful in your revision to: review materials in your course handbook revisit key regulations and associated guidance online make sure you are familiar with key regulatory criteria (including important numbers) ensure you are familiar with key calculation methods talk to colleagues and other students about the course End of course assessment

4. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems Session B – course recap and revision Having completed this course you should know about: the regulatory requirements and sources of guidance for energy efficiency standards for gas-fired and oil-fired heating appliances connected to ‘wet’ heating circuits the requirements of minimum boiler efficiency standards for gas- fired and oil-fired heating appliances connected to ‘wet’ heating circuits how able to determine if a non-condensing boiler installation would be acceptable the requirement relating to space heating primary circuits type and design for gas-fired and oil-fired ‘wet’ heating systems the compliance standards requirement for hot water storage vessels End of course assessment

5. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems Session B – course recap and revision End of course assessment (continued) Having completed this course you should know about: the requirements relating to the preparation and water treatment of hot water systems and wet central heating systems the requirements relating to the commissioning of hot water systems and wet central heating systems the requirements of the minimum standards for the control of gas- fired and oil-fired wet central heating systems the requirements of the minimum standards for insulation of pipework for gas-fired and oil-fired wet central heating and hot water storage systems the requirements relating to stand-alone, glandless heating systems circulators

6. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems Session B – course recap and revision Key websites: https://www.gov.uk/government/organisations/department-for- communities-and-local-governmenthttps://www.gov.uk/government/organisations/department-for- communities-and-local-government Key points to remember: Revision documents are available to you via the resource material or web link previously given. Regulatory documents L1A (New Dwellings) and L1B (Existing Dwellings) should be researched / read. Regulatory document Domestic Building Services Compliance Guide is the key document to the majority of information required for this course. Regulatory requirements and sources of guidance for energy efficiency standards for gas-fired and oil-fired heating appliances connected to ‘wet’ heating circuits

7. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems Session B – course recap and revision Key points to remember: Where installation of a condensing boiler may be difficult, an assessment should be completed to see if a non-condensing boiler would be allowed If it is suspected that a building may not be suitable for a condensing boiler, a standard form must be completed to assess whether a non-condensing boiler can be fitted for a specified fuel. Compared to non-condensing boilers, condensing boilers: –discharge gases from the flue terminal which are cooler, less buoyant and often form a visible plume –discharge gases which may wet surfaces too close to the terminal, or be a nuisance to neighbouring property or people passing nearby –cannot use a flue designed for a non-condensing boiler or share a flue with a non-condensing boiler –form liquid condensate within the boiler which must be discharged to a suitable drain or soak away Key websites: The Guide to the Condensing Boiler Installation Assessment Procedure for Dwellings www.planningportal.gov.uk/uploads/br/BR_PDF_PTL_CONDBOILER.pdf Appendix G of Part L of the Building Regulations – form for assessing when non- condensing boilers are permitted www.planningportal.gov.uk/buildingregulations/approveddocuments/partl/approved Non-condensing and condensing boiler installations

8. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems Session B – course recap and revision Example calculation: Use the form - Appendix G of Part L of the Building Regulations and the following example to work out whether a condensing boiler would be allowedAppendix G of Part L of the Building Regulations Non-condensing and condensing boiler installations