An open source initiative to share and compare heat pump performance data

Re:An open source initiative to share and compare heat pump ... by pjc50 on Friday April 12, 2024 @10:01AM (#40013007)

British note: UK govt subsidies for some insidious reason are not available to "reversible AC" style systems, so the dominant form here is air-to-water.

I had mine fitted last year. Retrofitted to existing radiators with 8mm pipework. With natgas backup/hot water boiler. At the end of this month I intend to go back and correlate the bills against the previous year (both kWh and £), because like a lot of discussion in this thread I think the installers have made some poor decisions. There's too much poorly insulated external pipework.

[ Parent | on HN ]

Re:An open source initiative to share and compare heat pump ... by horsburgh on Monday April 15, 2024 @03:04AM (#40037729)

If it's of any help in your battle with your installers the relevant part of the building regulations for external pipework is section 4.26 of approved document L: https://assets.publishing.service.gov.uk/government/uploads/...

The table in there assumes pretty high quality insulation and the neoprene-looking stuff doesn't meet that standard so would have to be thicker. Note that the way the performance of pipe insulation varies non-linearly with the pipe and insulation radius so it's a bit unintuitive.

How do I know? I had the same problem with my installers.

[ Parent | on HN ]