OFTEC Heat Pump case studies
OFTEC Heat Pump · Put your knowledge to work in context.
OFTEC describes itself as a trade association for liquid fuel heating equipment manufacturers and training providers, and it also runs a 'competent persons scheme' for businesses and technicians who are approved to install and maintain oil, solid fuel, electrical and renewable heating equipment. For renewable heating work, OFTEC points candidates to its renewables scheme alongside its Competent Persons, Microgeneration Certification, TrustMark and PAS 2030 registration routes. The OFTEC Heat Pump case studies are 5 cases and about 2,360 words.
1Sizing a retrofit ASHP against a heat-loss figure and existing radiator output
A 1930s semi-detached house has a calculated design heat loss of 8.4 kW at an external design temperature of -3 °C, with a flow temperature of 45 °C assumed. The existing radiators were sized years ago for a 75 °C flow / 65 °C return system and total 11.2 kW of nominal output at those conditions.
477 words, about 2 min2Commissioning a monobloc that trips on low pressure in heating mode
A newly installed 12 kW monobloc air-to-water heat pump serves an underfloor heating manifold on the ground floor and four radiators upstairs. On first commissioning in heating mode the unit runs for about four minutes, the low-pressure switch trips, and it locks out.
540 words, about 3 min3Controls and electrical design for a hybrid heat pump and boiler setup
A customer wants a heat pump as primary heat source with the existing gas boiler retained as backup for very cold days. The property has a 100 A single-phase supply.
456 words, about 2 min4A heat pump underperforming at service - diagnosis from operating data
A 10 kW ASHP installed two years ago is reported as 'expensive to run' and 'never warm enough'. At a service visit the outdoor temperature is 6 °C.
466 words, about 2 min5Regulatory and notification issues on a heat pump replacement
A homeowner is replacing an old oil boiler with an 11 kW ASHP. The property is in a conservation area and the outdoor unit is proposed on a side wall facing a neighbour's kitchen window about 2.5 m away.
421 words, about 2 min