As a family-run business of over 40 years, Newark Cylinders has a wealth of knowledge when it comes to answering commonly asked questions on hot water cylinders, thermal stores, buffer vessels, and more.
Table of Contents
- What is a Header Tank?
- Which is better – a copper or stainless steel hot water cylinder?
- What is a buffer tank/buffer vessel?
- What is a Thermal Store and how does it work?
- What is a thermal mixer?
- Why should I standardise my bespoke cylinder designs?
- What are horizontal cylinders?
- What is the difference between a calorifier and a hot water cylinder?
- What is a combination cylinder?
- What is an Immersion Heater?
- Where can I find manuals for your products?
- What size Hot Water Cylinder do I need for a family of 4?
- How Do I Maintain My Heating and Hot Water System?
- Why are there no Unvented cylinders on the online shop?
- Where do your cylinders come from?
- What is Economy 7?
- When is Economy 7 hours?
- Do you offer a trade discount?
- I live locally, can I collect?
What is a Header Tank?
“Header tank” is a term usually used for the cold water storage tank, positioned at the highest point of a vented, primary heating system.
The term “feed & expansion tank” is also commonly used for the cold water storage tank. However, this is usually for tanks within secondary hot water systems, rather than heating systems.
In both cases, the tanks accept cold mains water via a float valve, fill and keep their systems topped up with water, and absorb additional water volume from their systems when it expands through heating.
Which is better – a copper or stainless steel hot water cylinder?
Both copper and stainless steel have their own advantages.
Please see our comparison: https://newarkcylinders.co.uk/copper-vs-stainless-steel/
What is a buffer tank/buffer vessel?
Buffer Vessels only hold non-potable, primary water and don’t supply any hot water to taps or showers.
They can serve many different purposes within heating systems, including:
- Acting as a central point of heat storage generated by the property’s heat sources.
This may include storing heat generated by heat sources which aren’t always available, such as solar and solid fuel burners. Once the heat has been stored, it can then be drawn off for heating purposes, on demand, throughout the day.
- Adding volume to a system
Some heat sources require a system to have a minimum volume at all times, to prevent cycling of the heat source in the event that some parts of the system are isolated from the rest.
- Adding controllability to an otherwise uncontrollable heat source
A buffer vessel can be utilised to store heat from an uncontrollable heat source and then extracted on demand, to heat a cylinder which wouldn’t usually accept heat from an uncontrollable heat source (like an unvented cylinder).
Our service doesn’t include recommending the correct product designs for our customers’ jobs, so the effectiveness of their use within a system should, therefore, be determined by a competent installer.
What is a Thermal Store and how does it work?
Thermal Stores are designed for efficiently storing large quantities of heat energy until it is required.
The key difference between a Thermal Store and a standard hot water cylinder is that the Thermal Store provides hot water to your taps and showers, via a high surface area coil. High-pressure water from the cold main enters the bottom of this coil and absorbs heat from the surrounding water as it goes.
By the time the water reaches the top of the coil, its temperature will have increased substantially, so it passes through a thermostatic mixer valve to ensure it’s delivered to your taps at a comfortable 55°C. Assuming the store temperature is maintained at around 70°C, an unlimited amount of hot water will potentially be available.
Thermal Stores excel in versatility; a variety of different connections and coils can be incorporated for whatever combination of heat sources and points of use you have.
To find out more about how a thermal stores work, please read our article.
What is a thermal mixer?
“Thermal mixer” is a partial abbreviation of “Thermostatic Mixer Valve” and describes any valve whose job it is to regulate the temperature of the water that is being delivered to the property’s taps and showers.
It does this thermostatically, so as hot water enters the valve, it will detect the temperature of that water, and adjust itself to let in the amount of cold water that would be necessary to reduce that temperature to the desired level.
We supply mixer valves with all of our thermal stores, as the water tends to be relatively hot as it leaves these types of cylinders, so reducing that is necessary to ensure that no one gets scalded.
Why should I standardise my bespoke cylinder designs?
We usually work directly with companies who have particular requirements to meet, innovative ideas to incorporate, or restrictive obstacles to overcome. But in many of these cases, we then work with those companies to standardise that bespoke design into their own exclusive range, as it makes them optimal for the majority of their installations.
Compared to designing something bespoke each time, this helps to minimise everyone’s admin costs, the savings from which can passed on, keeping everyone in the supply chain competitively priced.
What are horizontal cylinders?
Contrary to semi-popular belief, they are not just vertical cylinders laid down. Horizontal cylinders are specially designed cylinders whose features are positioned in such a way that they can be laid down and still operate correctly.
What is the difference between a calorifier and a hot water cylinder?
Technically none, as a Calorifier is just a more definitive name for a hot water cylinder. However, within this industry, the term “cylinder” is often used to loosely refer to any cylindrical water storage vessel, including Thermal Stores and Buffer Vessels.
“Calorifier” is, however, usually used to describe hot water cylinders which are for marine applications and large industrial applications, while “cylinder” is used more for domestic hot water (DHW) applications.
What is a combination cylinder?
A combination cylinder (often referred to by us as a “combi”) is the exact same principle as a vented cylinder, but its cold water tank is built onto the top of the hot water storage section (as opposed to being situated somewhere above, such as on a shelf or in a loft space).
What is an Immersion Heater?
Immersion heaters are electrical components that are inserted either from the top or side of a cylinder to efficiently heat water. This process closely resembles the way a kettle functions to heat water.
Due to their (usually) low power outputs though, it can take much longer for immersion heaters to heat a cylinder than it would if heat sources such as heat pumps or boilers were used.
Where can I find manuals for your products?
If you require help with any of our other products, please contact us.
What size Hot Water Cylinder do I need for a family of 4?
It is advised that a cylinder should be installed to suit the maximum occupancy of the property, rather than how many people currently occupy it. This is because if you decide to move out, and a larger family moves in, the installed cylinder would meet their needs.
However, if you are planning on staying in the same property for a long period of time, it would be worth considering whether a smaller cylinder would be more appropriate. An unnecessarily larger cylinder would result in higher, and unwanted, running costs.
They suggest a household of 4 people who use the average amount of hot water requires an 80-litre indirect or a 140-litre indirect cylinder.
How Do I Maintain My Heating and Hot Water System?
Various factors can assist you with optimising the efficiency of your heating and hot water system.
You can read about these here.
Why are there no Unvented cylinders on the online shop?
Because Unvented cylinders by nature operate at high pressure, it can be dangerous to the occupants if an unvented cylinder is incorrectly installed and therefore requires an Unvented G3 Certificate.
If you are a certified installer, you can purchase an unvented cylinder directly through ourselves by getting in touch by email or phone.
Where do your cylinders come from?
All of our cylinders are manufactured in-house, which allows us to offer greater flexibility in designs and options for our cylinders.
What is Economy 7?
Economy 7 (or ‘ eco 7’) is an electricity tariff offering cheaper rates for off-peak hours and more expensive rates during peak hours.
When is Economy 7 hours?
The off-peak duration is for 7 hours, and according to Ofgem, your energy supplier will specify when this 7-hour period is. Although it is often between midnight and 7:00 am.
Do you offer a trade discount?
We do offer trade discounts and credit accounts, however, these are subject to approval after repeat business.
I live locally, can I collect?
Yes, when you are ready to checkout you can enter the discount code COLLECT to remove the carriage charge. We will then let you know when your unit is ready for collection.
Find us on what3words:
If we haven’t answered your question above, please don’t hesitate to contact us.