Boiler Servicing and Repair in Moor Park

What we do here

• Annual boiler servicing, with a written report at the end of it
• Repairs and fault finding
• Boiler replacement and system design
• Hot water cylinders, vented and unvented
• Central heating, radiators, valves and controls
• Zoned, smart and weather compensating controls
• Power flushing and system cleaning
• Underfloor heating
• General plumbing

Moor Park is a big-house problem, and that changes the work

Most of what makes a heating system difficult here comes down to one number. In this ward 74.2% of homes are detached, against 23.2% across England and Wales. Add the council tax profile: of the 2,870 properties in the wider area, 1,890 sit in bands G and H, the two highest bands there are.

Three quarters detached, and most of them large. That has consequences a smaller house never runs into.

Hot water arrives all at once. Several bathrooms on a weekday morning is a simultaneous demand problem, not an average one. A combi can only heat water as fast as the mains brings it in, so on this kind of house the honest answer is usually a system boiler feeding a correctly sized cylinder rather than a bigger combi. We size from the actual bathroom count and the measured flow rate at the stopcock, not from floor area.

Distance is the other one. In a long house the far bathroom can be a considerable pipe run from the cylinder, which means waiting, and litres down the drain every time. A secondary return loop fixes that properly. It is the sort of thing that gets left out of a like-for-like swap quote and then annoys people for the next fifteen years.

Zoning stops being a luxury. Heating a house this size as one zone means rooms nobody is in come up to temperature with the rooms in use. Splitting it into properly controlled zones, with weather compensation on a condensing boiler, is where the running cost actually moves.

Two building waves, not one

Moor Park has a reputation as a 1920s and 1930s garden estate. That is half right, and the half that is wrong matters when you open a system up.

The estate did begin in the twenties, and 560 properties here date from 1930-1939. But the largest single band is 1955-1964, at 690 properties, because building stopped for the war and resumed in the mid fifties. There are another 260 from 1973-1982 and a steady trickle since.

So there is no single vintage of system to expect. One house is an interwar build that has been through three or four boilers and has pipework from every one of them, still with the original runs buried where nobody wants to lift the floor. The next is a fifties or sixties house, which is the vintage where we most often find an open vented system with tanks in the loft that could sensibly be converted, or sensibly be kept and upgraded. We look before we recommend, because those are genuinely different jobs.

Servicing, and hard water

A service here means opening the boiler up. We check combustion with an analyser, inspect the heat exchanger and seals, test the safety devices, check the flue and its terminal, clean what needs cleaning, and leave you a written report of what we found rather than a verbal shrug. If the boiler is inside its manufacturer's warranty, that annual service is also what keeps the warranty alive.

The water is hard. Affinity Water supplies this area and its own wording is that almost all of its supplies are hard because of the natural geology of southern England. We are not going to quote you a figure for Moor Park, because Affinity does not publish which of its supply zones this postcode falls in and the two candidate zones either side of the estate differ by enough to make any single number misleading. If you want the exact figure for your address, Affinity's own postcode lookup gives it.

What hard water does is not in doubt. Scale settles wherever water is heated: on the hot side of a heat exchanger, inside a cylinder, around an immersion element. In a house with a large cylinder and a long run of hot pipework there is simply more surface for it to settle on, and the first sign is usually reheat times creeping up rather than anything breaking. We fit scale protection on new installations and will tell you whether it is worth adding to an existing system, including when it is not.

Repairs

A boiler that has locked out, lost pressure or gone cold is not automatically a dead boiler. Repeated pressure loss is usually a weeping valve or an expansion vessel that has lost its charge. Noise is usually scale or sludge. Andrew has spent forty years fault finding on heating systems, and the expensive mistake in this trade is replacing a boiler that needed a part.

On a house of this size that mistake costs more than most, because the replacement quote is bigger. If somebody has condemned a boiler here, it is worth a second opinion before you accept it. We quote before we touch anything, and if a repair is not worth doing we will say so.

Conservation area, covenants, and the flue

Moor Park has been a conservation area since 18 May 1995, and it is also a privately managed estate. Those are two separate permission layers and most people only know about one.

On the planning side, the thing residents expect to catch them usually does not. The 2004 Article 4 direction for Moor Park, approved by the Secretary of State in January 2005, withdraws permitted development rights for three things: rooflights inserted on a front or side elevation, extra hard surfacing facing the road frontage, and gates, fences and walls over a metre at the front. Chimneys, flues and soil and vent pipes are not in it. So a flue is governed by the ordinary conservation area position rather than by the Article 4, which is a better starting point than most people assume. Three Rivers publishes no flue wording of its own and asks residents to check with the planning department, so that is what we do rather than guess.

The estate side is the one people miss. Moor Park (1958) Ltd maintains the private roads, verges and open spaces, and enforces restrictive covenants written into property deeds. The council's own conservation area appraisal is blunt about the limits of its authority here, saying those restrictions are not planning issues that the Council can enforce, and that anyone planning development should consult the company to find out which covenants apply to their property.

For a boiler that means: if the job changes anything visible outside, a flue terminal position, a condensate run, an external enclosure, it is worth checking the deeds as well as the planning position. We would rather raise that at the quote than have it surface halfway through.

Who turns up

Andrew Millward, founder. Forty years on heating systems, Viessmann accredited, Heat Geek Elite, and the one to send at a fault nobody else has pinned down. Elis Harizi, director, in the trade since 2007 and a Heat Geek member, who does most of our installation, cylinder and underfloor work.

We are Viessmann accredited and fit that range often, including the Vitodens models, but we service and install every major brand and we are not paid to prefer one. No subcontractors: one of those two is who you get.

How we work

• No call-out fee, no charge for quoting
• A fixed price agreed before the work starts
• One year guarantee on our workmanship
• Monday to Friday 8am to 9pm, Saturday and Sunday 9am to 5pm

Around Moor Park

We work across this corner of Hertfordshire, including Rickmansworth next door, Northwood on the London side of HA6, and Chorleywood. More on what a service and a replacement involve is on our boilers page.

To book a service, get a fault looked at or get a price for a replacement, call Andrew or Elis on 07970 632 064.