Energy efficiency for gas-fired and oil-fired domestic heating and hot water systems

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 systemsSession 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 systemsSession B – course recap and revision End of course assessment • 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

4. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systemsSession B – course recap and revision End of course assessment 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

5. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systemsSession 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 systemsSession B – course recap and revision • Regulatory requirements and sources of guidance for energy efficiency standards for gas-fired and oil-fired heating appliances connected to ‘wet’ heating circuits Key websites: • https://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.

7. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systemsSession B – course recap and revision • Non-condensing and condensing boiler installations 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

8. Energy efficiency for gas-fired and oil-fired domestic heating and hot water systemsSession B – course recap and revision • Non-condensing and condensing boiler installations 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 allowed