New model Vaillant in cellar replaces iron commercial

Today’s case study looks at an interesting house near Leatherhead, Surrey, UK. Outwardly, it looks like a chalet bungalow, but at the some point in the past, a massive cellar was excavated underneath with a swimming pool, games room and boiler room. This was some years ago and the present owner has no need for the swimming pool, which together with the associated boiler/plant room, was at the end of its economic life. The pool and house was heated by a large iron open flued commercial boiler with a pressure jet burner.  There was masses of wiring in the cellar […]


Warm air transformed and a new hot water system

Our customer has recently bought a property in the Esher area. Built around 25 years ago, it was heated by two separate Johnson & Starley warm air heaters, one per floor.  For hot water, a 295 litre direct gas fired AO Smith cylinder was installed upstairs.  There was also a large gas hob and a gas fire. When we totalled up the load for all these appliances, it was around 92kW.  This would have been fine, apart for two key problems.  The first is that the property had a standard domestic metered supply, which has a maximum design load of […]


The Full Monty

Our customer in Warlingham, Surrey, UK was having a substantial extension to the side and rear of the property. We were asked to specify a replacement for the existing Lennox warm air system, using a mixture of radiators and underfloor heating. Numerous bathrooms in the house and a new annexe were to be converted to mains pressure hot and cold water systems. We designed a four zone heating system, for maximum energy efficiency.  An unvented hot water system augmented by a TWS water boosting accumulator supplied the bathrooms.  A Worcester 30CDi boiler provided the engine room function. At the customer’s […]


DPS Heatstore solves loft conversion challenge

    The house pictured, located in Croydon, Surrey UK,  was being extended into the loft space.  The loft tanks for the hot water system and radiator header tanks had to be removed to make way for the new accommodation. Our challenge was to provide a new heating and high pressure cold & hot water system in an 1900mm high cellar, which could replicate the shower performance of the existing powerful pumped tank fed system in the loft.  Furthermore, it should support the use of extra bathrooms in the loft area. This project raised a number of challenging problems.  We could have […]


2nd Vaillant boiler in Peckham apartment

Working on behalf of a Landlord, we replaced a 20yr old Vaillant system boiler in this apartment block in Peckham, South East London. The old unit was beyond economic repair, and our customer wanted the peace of mind a new boiler with a 5 year warranty would bring.  We imagine his tenant would be appreciative too. We removed the old unit, powerflushed all the radiators, and dosed the system with corrosion inhibitor.    When we connected the new boiler there were problems with the hot water motorised valve in the upstairs airing cupboard.  Upon examination the wiring and and the […]


Replace old Potteron Prima with the latest Vaillant condensing boiler

Having installed a Vaillant boiler in a rented property owned by this customer in 2008, we were invited to quote for a new boiler in his main residence, a very nice house near Hurstpierpoint, Sussex, UK.   We recommended the Vaillant 428 ecoTEC+ compact heat only boiler.  This manufacturer has a unique selling point in that their external flue can be routed to a vertical termination point.  Many condensing boiler installations have a nuisance factor in that the steam (or ‘plume’ as we describe it) passes visibly across the house and can be detrimental to the owner’s enjoyment.  The Vaillant […]


Better showers = unvented cylinder

  Our customer in Purley had a boiler fitted by Hot Water & Central Heating in 2005, and was in the process of having a bathroom refitted.    Their old gravity water system cylinder was in the way of a new shower enclosure.   We worked alongside their bathroom installers (Visions) to swap over from a vented bathroom setup to a new unvented cylinder in the loft.  Our customer is a retired chemical engineer, and he specified one of the first Vaillant weather compensated heating systems when we originally installed his Vaillant ecoTEC 630 boiler in 2005. Naturally, he decided to […]


New Vaillant System boiler in Coulsdon, Surrey

Our customer had an old Glowworm boiler which was in a position preventing a planned extension to the house. HWCH Ltd were recommended by another customer, and we suggested replacing the boiler with a modern Vaillant ecoTEC 630 system boiler. The Vaillant ecoTEC+ 630 is a 30Kw boiler (102,000 BTu output) with an integral 2 speed pump, all mounted in a modern near-silent enclosure. We give 5 year warranties on our Vaillant boilers, which, along with the recommendation, no doubt helped win us this contract. The customer had originally carried his own central heating installation over 20 years ago, and a […]


New Vaillant 6 series system boiler in loft, Nutfield

Our client, an independent church ministry, occupy a building in the Nutfield region of Surrey, near Redhill. Their original boiler was a Potterton Suprima, a model which enjoyed high sales between approximately 1995 and 2004.  Unfortunately, it also featured regularly on BBC’s Watchdog programme, due to some alleged design defects which result in the circuit boards needing frequent replacement. This unit failed for a diffferent reason.  The Suprima can have a long flue run, if the optional Potterton twin pipe system is employed.  Our customer had such an installation, running from the airing cupboard mounted boiler, through a large loft space, […]


Vaillant boiler in Tadworth, Surrey

HWCH’s customer had a rather ugly old boiler mounted in a cupboard in the kitchen. This unit had to go, as a refurbishment was imminent.  We recommended fitting a Vaillant boiler in the utility room. The Vaillant 428 is a small open vented boiler which is designed especially for the UK market, where we often have a small radiator tank in the loft. The boiler flue from a modern high efficiency unit discharges plume, a condensation laden steam effect rather like an old train.  Building Regulations and good neighbour relations mean that we have to be mindful in which direction this discharges. […]

Customer Testimonials

Excellent Work

Excellent work , the workers were very efficient, considerate and tidy. They worked with the least disruption possible for an elderly lady. Any unexpected problem was dealt with safely and professionally. The finished heating is to a high standard. K.T. Kent

Jennie 05/05/2017