Planning, building control, the network operator, and the documents an installation should leave behind.
The grant that pays part of the cost of replacing a boiler with a heat pump in England and Wales. What it is worth, who can have it, and what the April 2026 rule changes opened up.
Most air source heat pumps are installed under permitted development, and one of the conditions is a noise calculation. This is what the calculation does and what fails it.
Six questions that come up in almost every appointment, with an honest answer to each and what tends to get said instead.
Quotations for the same house rarely arrive in the same shape. A method for putting them side by side, and what a big difference in price usually turns out to be.
Short answers on what needs permission, what needs notifying, and which documents will still matter in ten years.
Eleven questions, what a good answer sounds like, and what a bad one tells you. Print it, take it to the appointment.
A quotation should show its working. What ought to be in one, what the gaps usually mean, and the handful of numbers that matter more than the price.
Householders are arriving with their own figures and a list of questions. This is what they have been told to ask, why, and how to be the quote that survives the comparison.
They are not judging your pipework, because they cannot. They are judging half a dozen other things, and those decide whether you get the review and the neighbour's job.
The documents and settings that decide whether anybody has to ring you in three years, and whether the next engineer can work out what you did.
The paperwork is not a formality. The certificate, the design calculations and the commissioning records are what prove the installation was done to the standard, and they are needed years later.
Anything that generates or stores electricity has to be notified to the local network operator, and above a certain size has to be approved before it is connected. The difference is worth knowing before signing.