Heating and Plumbing Options Compared
Straight comparisons of the heating, hot water, cooling and bathroom options homeowners weigh up, with the trade-offs stated plainly.
Each page sets two realistic options against each other and says which situations genuinely favour which — including when the cheaper option is the right one.
Combi or System Boiler When You Have More Than One Bathroom
Once a house has two bathrooms in regular use, the combi-versus-system question stops being about preference and starts being about whether one heat exchanger can serve everyone at once. This page sets out where each genuinely wins for that specific household shape.
heatingSystem Boiler or Regular (Heat-Only) Boiler
Both feed a hot water cylinder, but a system boiler is sealed and pumped with its own expansion vessel while a regular boiler relies on a feed-and-expansion tank in the loft. The right one depends on what's already up there and what you're willing to change.
hotwaterUpgrading from a Vented to an Unvented Cylinder
This page is about the upgrade decision specifically: whether it's worth swapping a working gravity-fed vented cylinder for a mains-pressure unvented one, not the general difference between the two types.
heatingBoiler Repair or Full Replacement: Making the Call
This is the decision itself, not a general comparison — what tips a specific ageing boiler from another repair into being replaced, looked at appliance by appliance rather than by a fixed age rule.
heatingRadiators or Underfloor Heating
Underfloor heating and radiators both distribute heat from the same boiler or heat pump; the difference is how that heat gets into the room and what it asks of the floor build-up.
coolingSplit System or Portable Air Conditioning
A split system has an outdoor condenser and a fixed indoor unit connected by refrigerant pipework; a portable unit is self-contained and vents through a window hose. The right one depends on how permanent the cooling need is.
heatingAir Source Heat Pump or Gas Boiler
A heat pump moves heat from outside air at low flow temperatures; a gas boiler burns fuel to produce heat at higher temperatures instantly. Which suits a house depends heavily on its fabric and existing emitters, not just preference.
bathroomElectric Shower or Mixer Shower
An electric shower heats cold mains water instantly using its own element; a mixer shower blends hot and cold from your existing hot water system. Which suits a bathroom depends on what's feeding it and how it's used.
bathroomPower Shower or Standard Mixer Shower
A power shower adds a pump to boost flow from a low-pressure supply; a standard mixer relies on whatever pressure the system naturally provides. The comparison only matters where pressure is genuinely limited.
bathroomBath or Shower-Only Bathroom
Removing a bath to fit a larger shower enclosure, or keeping one, is a layout and household decision as much as a plumbing one — both are perfectly viable, and the right answer depends on who uses the room.
bathroomWet Room or Framed Shower Enclosure
A wet room tanks the whole floor and lets water drain openly to a level gulley; a shower enclosure contains water within an enclosed tray and screen. Both work well — the deciding factors are the room's structure and who uses it.
pipeworkCopper or Plastic Pipework for Heating and Plumbing
Copper and modern plastic pipe (typically PEX or similar) both do the job reliably when installed correctly; the choice usually comes down to the specific run rather than a blanket preference for one material.
controlsThermostatic Radiator Valves or a Single Room Thermostat
A room thermostat controls the boiler based on one reference room; thermostatic radiator valves (TRVs) control heat output at each individual radiator. Most homes need both, but the balance between them matters.
controlsSmart Thermostat or a Standard Programmer
A standard programmer switches the heating on and off to fixed times; a smart thermostat adds remote control, learning and sometimes room sensors. The upgrade is worthwhile for some households and unnecessary for others.
heatingMagnetic Filter or Chemical Inhibitor
These aren't really alternatives — a magnetic filter traps debris physically and an inhibitor treats the water chemically to slow corrosion — but homeowners often ask which one they need, so here's how each actually works.
heatingPower Flush or an Ongoing Chemical Inhibitor Regime
This page looks at the maintenance choice: whether a one-off power flush or simply keeping inhibitor topped up and monitored over time is the right approach for a given system's condition.
heatingSingle Panel or Double Panel Radiators
The panel count on a radiator directly affects how much heat it can put into a room for a given wall space, which matters when replacing radiators or fitting new ones in an extension.
bathroomHeated Towel Rail or Standard Radiator in a Bathroom
Bathrooms can be heated by either a towel rail or a standard radiator, and the two aren't equivalent in output — the choice affects both towel drying and how warm the room actually gets.
hotwaterImmersion Heater or Boiler for Hot Water
An immersion heater heats a cylinder electrically as a standalone or backup method; the boiler heats it via a coil as the primary method on most systems. Each has a genuine role, usually alongside the other rather than instead of it.
heatingGas Boiler or Electric Boiler
Electric boilers heat water using an element rather than burning fuel, removing the need for a flue or gas supply entirely. They suit specific situations rather than being a general alternative to gas.
heatingLPG or Natural Gas Heating
Where a property sits relative to the gas grid decides most of this comparison — LPG serves homes the mains network hasn't reached, with different delivery and storage arrangements to match.
heatingOil or Mains Gas Heating
Oil heating remains common where mains gas has never reached a property; the comparison matters most when a gas connection becomes available and a genuine choice appears.
heatingOpen-Vented or Sealed Heating System
An open-vented system uses a feed-and-expansion tank in the loft to manage pressure; a sealed system uses an expansion vessel and is pressurised from the mains. The choice affects the whole heating circuit, not just the boiler.
hotwaterGravity-Fed or Pumped Hot Water
Gravity-fed hot water relies purely on the height between a loft tank and the outlet; pumping adds mechanical boost to that flow. This matters specifically for households on an older vented cylinder system.
pipeworkTap Repair or Tap Replacement
A dripping or stiff tap doesn't automatically need replacing — most faults are down to a worn cartridge, washer or seal that can be repaired far more cheaply than fitting a whole new tap.
bathroomMacerator or Gravity Waste for a New Bathroom
A macerator pumps waste through small-bore pipework where gravity drainage isn't possible; a standard gravity waste relies on a proper fall to the existing soil pipe. The choice depends entirely on where the new bathroom sits.
heatingWall-Hung or Floor-Standing Boiler
Most modern domestic boilers are wall-hung, but floor-standing models still exist for specific outputs and situations, particularly at the higher end of heat demand.
heatingInternal or External Condensate and Flue Runs
How a boiler's flue and condensate pipe are routed affects both installation cost and, particularly for condensate, how likely the pipe is to freeze in cold weather.
heatingAnnual Servicing or Fixing Problems as They Happen
Some households service their boiler every year without fail; others only call an engineer when something actually stops working. Both are real approaches — here's what each genuinely trades off.
heatingLandlord Gas Safety Record (CP12) or a Full Service
A landlord gas safety record confirms the legal minimum safety checks on gas appliances at a rental property; a full service goes further into the boiler's internal condition and performance.
heatingNew Radiators or a New Boiler First
Where a heating system is underperforming, it's not always the boiler at fault — sometimes it's radiators that were sized for an older, hotter-running appliance. Deciding which to replace first matters.
hotwaterReplace the Cylinder or Convert to a Combi
When an old cylinder fails, homeowners often ask whether it's worth replacing like-for-like or taking the opportunity to remove it entirely and switch to a combi. It depends on the household, not just the failed part.
pipeworkDIY or a Registered Engineer for Plumbing and Heating Work
Some plumbing tasks are genuinely fine to do yourself; others are restricted by law to registered competent persons. Knowing which is which avoids both wasted money and real safety risk.
pipeworkOutdoor Tap or Garden Standpipe: Which Suits Your Garden?
Both give you water outside, but they solve different problems. An outdoor tap is a short branch off the internal cold supply through the wall; a standpipe is a freestanding riser fed by a buried run out into the garden.
controlsService Plan or Pay As You Go: How to Cover Your Boiler
Some households prefer a scheduled arrangement where the annual service is booked and budgeted; others would rather call an engineer only when something needs doing. Neither is wrong, but they suit different circumstances.