Compare your options
The decisions that actually change what you spend and how the house feels, set out honestly with the trade-offs on both sides.
Combi vs System Boiler: Which Suits Your House?
This is the single most consequential decision in a boiler replacement, and it is not a question of which type is better. A combi is the right answer in a large number of homes and the wrong answer in a meaningful minority. Three factors decide it: how many bathrooms you have, how often two outlets run at once, and what your incoming mains actually delivers.
Repair or Replace? Making the Call on an Old Boiler
Every engineer gets asked this and plenty answer it in their own commercial interest. Here's the honest framework we use: a repair is good value when the appliance is otherwise sound, parts are available, and the fault is not a symptom of a broader failure. It stops being good value when you're funding a sequence of repairs on an appliance approaching the end of its service life.
Fixed Air Conditioning vs Portable Units and Fans
Every hot spell sells a lot of portable air conditioners, and most of them end up in a garage by September. It's worth understanding why: it isn't that portables don't work at all, it's that the compromise they make — venting hot air through a hose in a partly open window — undermines the thing you bought them for.
Power Flush vs Chemical Clean: Which Does Your System Need?
System cleaning gets sold as one thing when it's really three: a chemical clean, a full power flush, and ongoing magnetic filtration. They cost different amounts, take different lengths of time and suit different conditions — and paying for the biggest option on a lightly affected system is money you didn't need to spend.
Unvented Cylinder vs Vented: Mains Pressure Hot Water
If your showers are weak upstairs and there's a cold tank in the loft, you have a vented system and gravity is the reason. An unvented cylinder is fed directly from the mains and delivers hot water at close to mains pressure everywhere in the house. It's a genuinely transformative upgrade in the right property — and pointless in the wrong one.
Annual Service or Breakdown Cover: Where's the Value?
These are often presented as alternatives when they do different jobs. An annual service is preventative work on the appliance and the system. A cover plan is insurance against the cost of a failure. Understanding what each one actually delivers — and what the exclusions usually are — makes the decision much simpler.