Commentary for the Heat Training Grant 2025 Mid-scheme Review: Survey of HTG Graduates
Published 4 June 2026
Applies to England
© Crown copyright 2026
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This commentary summarises the findings from the second release of the Heat Training Grant (HTG) 2025 Mid-scheme Review Survey. The HTG, launched in July 2023 by the Department for Energy Security and Net Zero (DESNZ), is a scheme that provides grants of up to £500 to support trainees in England undertaking short training courses relevant to heat pump and/or heat networks. Grants are typically delivered as a discount on training costs, with courses covering the skills required to install heat pumps under a competent person scheme (CPS).
The second release of the survey was conducted between November and December 2025, with the results published as data tables in June 2026. Where relevant, results are compared with the 2024 release of the survey, conducted between August and September 2024, and published in January 2025. You can read the results for the 2024 release of the HTG Mid-scheme review.
Results
Work Region and Training Availability
Months elapsed since HTG completion: Of all the respondents, 64% reported completing the HTG-subsidised training less than 6 months ago (from the point of survey completion), with a further 27% completing training between 6 and 12 months ago. This compares to 56% from the 2024 survey results who completed training less than 6 months ago from survey completion and 36% between 6 and 12 months ago [Table 1a: QA01].
Region of work: The most frequently reported regions of work were London (23%), the South East (21%) and East of England (17%). This compares to the 2024 survey results, where London (20%), the South East (17%) and West Midlands (15%) were the most reported work regions [Table 2a: QA02].
Training availability: 47% of all respondents said they would not have completed heat pump installation training if the HTG had not been available, while 22% said they would have completed heat pump installation training and 31% did not know. This compares to the 2024 survey results, when 71% said they would not have completed training and 29% said they would have [Table 3a: QA03].
Training timing: Of the respondents who said they would have completed heat pump installation training even if HTG-subsidised training was unavailable (responding ‘yes’ to QA03), 50% said they would have completed training in the same year, while 27% did not know. This compares to the 2024 survey results, when 46% said they would have completed training in the same year and 46% said they would have completed it later than the year of completion under the HTG [Table 4a: QB03].
Training Quality
Training satisfaction: 67% of all respondents said they were ‘very satisfied’ with their HTG-subsidised training. A further 27% said they were ‘satisfied’ and 4% said they were ‘neither satisfied nor unsatisfied’. [Table 5a: QA04].
Post training confidence: 37% of all respondents said they felt ‘very confident’ about installing a heat pump after completing HTG-subsidised training. 43% said they felt ‘confident’, and 17% said they felt ‘neither confident nor unconfident’. [Table 6a: QA05].
Training recommendation: 45% of all respondents said they had already recommended the HTG-subsidised training to a friend or colleague, while 36% said they were ‘very likely’ and 14% were ‘likely’ to recommend the HTG subsidised training. [Table 7a: QA06].
Heat Pump Installations
Heat pump installations: 67% of all respondents said they had not installed any heat pumps since completing HTG‑subsidised training, while 33% had installed at least one heat pump. This compares to the 2024 survey results, when 73% said they had not installed a heat pump since completing HTG-subsidised training and 27% said they had installed at least one heat pump. [Table 8a: QA07].
Heat pump installations by months elapsed since training completion: Of the 64% of respondents who completed HTG-subsidised training less than 6 months ago (from the time of survey completion), 25% had installed at least one heat pump while 75% had not installed any heat pumps. Of the 27% of respondents who completed HTG-subsidised training between 6 to 12 months ago, 50% had installed at least one heat pump while 50% had not installed any heat pumps [Table 8b: QA07].
Time between training completion and heat pump installation: Of the respondents who had installed at least one heat pump after completing HTG-subsidised training (responding ‘yes’ to QA05), 70% did so less than 3 months after training completion and a further 28% within 3 to 6 months of training completion [Table 9a: QB07].
Number of heat pump installations: Of the respondents who had installed at least one heat pump after completing HTG-subsidised training (responding ‘yes’ to QA05), 78% had installed between 1 and 5 heat pumps, and 17% had installed between 6 and 10 heat pumps. This compares to the 2024 survey results, when 64% reported installing between 1 and 5 heat pumps and 27% between 6 and 10 heat pumps [Table 10a: QC07].
Building type for heat pump installation: Of the respondents who had installed at least one heat pump after training under the HTG (responding ‘yes’ to QA05), 51% said they had installed heat pumps in domestic retrofit properties, and 46% had installed heat pumps in domestic new build properties. This compares to the 2024 survey results, when 44% reported domestic retrofit installations, 37% reported domestic new build installations, and 14% reported non-domestic retrofit installations [Table 11a: QD07].
Additional Training
Additional heat pump installation training: 78% of all respondents said they had not completed any additional heat pump installation training after completing HTG-subsidised training, while 22% said they had undertaken additional heat pump installation training. This compares to the 2024 survey results, when 31% of respondents completed additional training and 69% did not [Table 12a: QA08].
Additional heat pump installation training by HP installations: 65% of respondents who had installed at least one heat pump after completing HTG-subsidised training had not undertaken additional heat pump installation and maintenance related training, while 35% had undertaken additional training. In contrast, among respondents who had not installed any heat pumps, 84% had not undertaken additional training, while 16% had undertaken additional training [Table 12b: QA08].
Type of additional training: Of the respondents who completed additional heat pump installation training (responding ‘yes’ to QA08), 42% sought product or manufacturer specific installation skills, 32% sought low temperature system design skills, and 24% sought more in depth heat pump installation skills [Table 13a: QB08].
Additional training importance: Of the respondents who completed additional heat pump installation training (responding ‘yes’ to QA08), 74% said the additional training was ‘very important’ for carrying out heat pump installations, and a further 19% said it was ‘important’ [Table 14a: QC08].
Salary Information
Salary change: 72% of all respondents said their salary remained the same since completing HTG-subsidised training, while 13% reported a salary increase and 14% did not know. This compares to the 2024 survey results, when 73% reported their salary had remained the same and 24% reported a salary increase [Table 15a: QA09].
Salary change amount: Of the respondents who reported a salary increase (responding ‘salary increased’ to QA09), 44% said their salary increased by 10 to 20%, while 33% reported an increase of less than 10% [Table 16a: QB09].
Important of HTG for salary change: Of the respondents who reported a salary change (responding ‘salary increased’ or ‘salary decreased’ to QA09), 31% said that the HTG was ‘very important’ for their change in salary and 13% said that it was ‘important’. [Table 17a: QC09].
Additional Support
Additional support: 76% of all respondents said that they had not used any additional support beyond additional training after completing HTG-subsidised training, while 15% said they had accessed additional support and the remaining 9% did not know [Table 18a: QA10].
Type of support: Of the respondents who had used support post-training (responding ‘yes’ to QA10), 30% said they had used heat pump installer discussion & advice forums, 23% said they had used on-site guidebook(s) and 17% said they had used on-site commissioning support for first installation [Table 19a: QB10].
Certification Outcomes
MCS certification: 77% of all respondents said they (or the company they work for) were not MCS certified at the time of HTG-subsidised training, while 16% said that they were MCS certified, and 7% did not know [Table 20a: QA11].
MCS certification by HP installations: Of those who had installed at least one heat pump since completing HTG-subsidised training, 28% were MCS certified at the time of training, while 61% were not MCS certified. Of those who had not installed any heat pumps since completing training, 10% were MCS certified at the time of training while 85% were not MCS certified [Table 20b: QA11].
Post training MCS certification: Of the respondents who did not work for an MCS certified company at the time of training (responding ‘no’ or ‘don’t know’ to QA11), 76% did not obtain MCS certification after completing training, while 12% did go on to obtain MCS certification and 12% did not know. This is consistent with the 2024 survey results, when 74% did not obtain MCS certification after training, 12% did, and 14% did not know [Table 21a: QB11].
Post training MCS certification by HP installations: Of those who had installed at least one heat pump since completing HTG-subsidised training, 15% obtained MCS certification post-training, while 73% did not obtain MCS certification post-training. Of those who did not install any heat pumps since completing training, 11% obtained MCS certification post-training, while 77% did not obtain MCS certification post-training [Table 21b: QB11].
Other CPS certification: 63% of all respondents said they (or the company they work for) were registered with a different competent person scheme (i.e. non MCS) for other measures, while 24% were not CPS certified and 12% did not know [Table 22a: QA12].
Voucher Redemptions
Training voucher redemption: Since the launch of the HTG, a total of 9,100 training vouchers have been redeemed by training providers registered under the HTG between quarter 1 (April to June) of the financial year ending (FYE) 2024 and quarter 3 (October to December) FYE 2025 [Table 23a: DC01]