Making the right choice

03 October 2016

High efficiency boilers are usually the preferred option when new build specifiers are selecting heating systems for UK homes, with two popular solutions being combi boilers, and system boilers coupled with unvented hot water cylinders. Bill Jones from Potterton says that deciding between the two should be based on the on the size of the property and the type of residents likely to occupy it.

Today's new homes generally have combi or system boilers installed, with the latter being teamed with unvented cylinders to provide hot water. Providing they are sized correctly, both will be equally effective space heating systems but must be installed in the right type of property in order to meet the hot water demands of the people living there.
 
A high proportion of unvented cylinders are fitted in new build properties - so much so that there is usually a noticeable correlation between cylinder and new build market growth.

Unvented cylinders are specified because they deliver exceptional flow rates; our sister company Heatrae Sadia manufactures the Megaflo Eco, which can deliver up to 72 litres of hot water per minute. They can provide powerful showers and fast filling baths without a significant drop in performance if more than one tap or shower is used at the same time, making them ideal for larger properties with multiple bathrooms.

Unvented systems are also a good choice if luxury products such as multi jet showers and jetted air baths are fitted, which rely on fast flow rates to work effectively.

Unvented cylinders have become the preferred option for many housebuilders, but it's important for specifiers to consider that for smaller dwellings with fewer bathrooms and fewer occupants a combi boiler could be a more appropriate choice.

Combi boilers are easy to install and offer a continual supply of virtually instantaneous hot water without needing a storage cylinder - which frees up valuable space - or any hot water controls.  New models can deliver higher flow rates - our Promax Ultra Combi, for example.

Combi boilers can also help housebuilders to meet Part G of the Building Regulations, which states that water consumption in a new build property shouldn't exceed 125 litres per person per day.

To ensure homeowners' hot water demands and expectations are met, it's important to install the right heating system for the property. Potterton's Newdesign team provides a complete design service for residential developments and is able to work with SAP assessors and other technical parties to help housebuilders to meet carbon or energy targets. In addition, Potterton's whole life costing model helps housebuilders to analyse all the costs and revenues associated with installing a Potterton boiler.

By ensuring that the heating system chosen is suitable for the size of property and the type of household an appropriate amount of hot water is delivered, space is maximised and the homeowner isn't left disappointed.

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