Best Potterton Promax Store Boilers Available for Home

Reviews, Comparison and Buyers Guide

The Potterton Promax Store is a floor standing gas condensing boiler that has a built-in storage tank to eliminate the need for a separate cylinder.

Designed to fit in an airing cupboard, the Potterton Promax Store is unique in that it has its very own hot water storage tank built into the boiler. Why is that so great? Well, it means you don’t have to find space to store any separate cylinders or tanks because the boiler doesn’t require any. It does, however, mean that the boiler is bigger than your average combi or system boiler, which is why it’s a floor standing appliance. We can help you with our five best findings available for Home.

  • Potterton Promax Store 150L Regular Gas Boiler– It is a condensing wall mounted boiler, and it comes with a wide range of different features to give it maximum reliability.
  • Potterton Promax SL Heat 12kW Regular Gas Boiler– The Potterton Promax SL 12kW boiler is small and slim-line but it still manages to pack quite a punch.
  • Potterton Promax 24kW Combi Gas Boiler– It comes with a wide variety of features and options to make this boiler an extremely reliable product. 
  • Potterton Promax Ultra 24kW Combi Gas Boiler– This unit has been designed with a wide range of features and options to make it a extremely reliable boiler.
  • Potterton Promax System 12kW Gas Boiler– It is a condensing wall mounted unit with many different features and options to help make it the most reliable boiler possible. 

Name             Our Rating    Availability        Price               Efficiency Ratings

Potterton Promax Store 150L Regular Gas Boiler8.8/10YES£2,00089%  
Potterton Promax SL Heat 12kW Regular Gas Boiler9.2/10 YES£67591.10%
Potterton Promax 24kW Combi Gas Boiler8.2/10 YES£1,06589%
Potterton Promax Ultra 24kW Combi Gas Boiler9.4/10YES£1,10089.1%
Potterton Promax System 12kW Gas Boiler9.2/10YES£84589%

Potterton Promax Store 150L Regular Gas Boiler

The Promax store is a regular gas boiler that is designed and manufactured by Potterton. It is a condensing wall mounted boiler, and it comes with a wide range of different features to give it maximum reliability. It has an efficiency rating of 89% and an output rating of 24kW.

This boiler also comes with a 25 liter per minute output and is a boiler that features a roller system and is a low lift weight to help save you money on installation. It provides a simple and easy to install heating solution for domestic properties that have high water demands and is a boiler that is perfect for new build and social housing.

This boiler is able to fit in a standard-sized airing cupboard with it being available in different liters of hot water such as the 90, 115, or 150 liters. It comes with a no pump overrun as well as a pre-plumbing jig helping to save time on installation and is compatible with the Megaflo Eco solar cylinder and Santon Premier Plus solar cylinders. To give you even more security that you have bought a reliable boiler it also comes with 2 years warranty.

Advantages:

  • Suited to small, medium and large-sized homes with a fully pumped sealed system
  • Fully modulation outputs from 6.8kW to 24kW – intelligently uses the right amount of fuel
  • Competitive Price
  • Professional Installation
  • Reputable, reliable and reasonably priced

Disadvantage:

  • A bit expensive.

Features:

Band RatingB Rated
ERP RatingA Heat
Central Heating Max. Output24kW
Flow Rate25 l/min
LPG CompatibleNo
MountingWall Mounted
Typical Price (inc VAT)£2,000
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£2,500 – £3,000

Product Key Specifications:

MakePotterton
ModelPromax Store 150L Regular Gas Boiler
Is CondensingCondensing
Efficiency Rating89%
Standard Warranty2 Years

Potterton Promax SL Heat 12kW Regular Gas Boiler

Size isn’t everything. The Potterton Promax SL 12kW boiler is small and slim-line but it still manages to pack quite a punch.

Recommended by the Energy Saving Trust this powerful heat-only boiler is deceptively small and achieves a SEDBUK 2009 efficiency rating of 91.10%.

One of the smallest and lightest boilers out there it weighs just 26kg and measures 60x39x28cm so if you’re looking for a compact and lightweight boiler to fit inside your kitchen cupboard this could well be the one.

This high-efficiency space-saving boiler is environmentally friendly easy to install and features basic heating controls so it’s easy to operate.

The Potterton Promax SL 12kW is an open vent boiler best suited to flats and small homes. But for larger properties where heat demand is greater, you can choose between outputs ranging from 15kW to 30kW.

The Energy Savings Trust recommends this boiler.

https://www.boilerguide.co.uk/productinfo/potterton/promax-sl-regular-gas-boiler-12kw

Advantages:

  • No need for separate cylinder or loft tanks
  • Flue length options up to 20m – siting flexibility
  • A good back up plan with servicing
  • Parts and labor at no extra cost for five years
  • Excellent service all round.

Disadvantage:

  • May not meet regulations and cannot be installed in the offered site due to flue and lack of spacing for pipes.

Features:

Band RatingA Rated
ERP RatingA HEAT
Central Heating Max. Output12kW
Flow RateN/A
LPG CompatibleYes
MountingWall mounted
Typical Price (inc VAT)£675
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,175 – £1,675

Product Key Specifications:

MakePotterton
ModelPromax SL Heat 12kW Regular Gas Boiler
Is CondensingCondensing
Efficiency Rating91.10%
Standard Warranty1 Year

Potterton Promax 24kW Combi Gas Boiler

The Promax 24kW is a combi gas boiler. It is a condensing wall mounted unit, made and manufactured by Potterton so you can be sure that you have bought a reliable boiler. It comes with a wide variety of features and options to make this boiler an extremely reliable product. It has an efficiency rating of 89% (making it a B rated boiler), and a N0x class of 5. The Promax is available in a wide range of sizes such as the 24kW, 28kW, 33kW (with this unit being the 24kW). It comes with a flueing option of up to 20m and features built in frost protection to protect it through the cold and wintery months when you need your boiler most. It can be fitted across a wide range of medium, small or large installation projects.

It has robust hydraulic connections and is a fully modulating and highly efficient boiler. The Promax combi intelligently uses the right amount of fuel to help you save money on your energy bills. This unit features a pre-plumbing jig – helping to save time on installation. The boiler comes with an optional stand-off bracket, helping to allow pipes to be routed behind the boiler. As well as this it comes with separate central heating and domestic hot water controls, helping to give you maximum control over your boiler. It comes with 2 years warranty so you can be sure that you have purchased a reliable boiler.

https://www.boilerguide.co.uk/productinfo/potterton/promax-combi-24kw

Advantages:

  • Easy to use and service
  • Integral 7-day twin channel timer
  • Reasonable Price
  • 1st class service from all involved

Disadvantage:

  • 2-year warranty – would prefer a longer standard guarantee

Features:

Band RatingA Rated
ERP RatingA Heat A Water
Central Heating Max. Output24kW
Flow Rate2 l/min
LPG CompatibleYes
MountingWall Mounted
Typical Price (inc VAT)£1,065
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,565 – £2,065

Product Key Specifications:

MakePotterton
ModelPromax 24kW Combi Gas Boiler
Is CondensingCondensing
Efficiency Rating89%
Standard Warranty2 years

Potterton Promax Ultra 24kW Combi Gas Boiler

The Promax Ultra is a combi gas boiler. It is a wall mounted condensing unit that has been made and manufactured by Potterton. This unit has been designed with a wide range of features and options to make it an extremely reliable boiler. It has been designed specifically for social housing and new build projects, but also comes with a wide range of output ratings such as the 24kW, 28kW, 33kW and 40 kW, helping to make it perfect for just about any home.

With this unit able to deliver a hot water flow rate of up to 16.4 liters per minute and an excellent sap 2012 seasonal efficiency rating – helping to make it a cost effective boiler. It is a highly efficient B rated boiler with an efficiency percent of 89.1% and an output of 24kW as well as it coming with the best N0x class of 5. It features a pre-plumbing jig, helping to save time and money on installation. The ProMax ultra-also features flueing options of up to 20m, helping to offer flexibility in where the unit is able to be placed. It has an option of two fuel types – LPG and natural gas. It comes with 2 years warranty to add to the security that you have bought a reliable boiler.

https://www.boilerguide.co.uk/productinfo/potterton/promax-ultra24kw

Advantages:

  • NOx Class 5 boiler – kinder to the environment
  • Built-in frost protection – can be installed in a garage or basement
  • Pre-plumbing jig – makes installation easier and quicker

Disadvantage:

  • Potterton boilers have an overall Which? score of 54%

Features:

Band RatingA Rated
ERP RatingA Heat, A Water
Central Heating Max. Output24kW
Flow Rate2 l/min
LPG CompatibleYes
MountingWall Mounted
Typical Price (inc VAT)£1,100
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,600 – £2,100

Product Key Specifications:

MakePotterton
ModelPromax Ultra 24kW Combi Gas Boiler
Is CondensingCondensing
Efficiency Rating89.1%
Standard Warranty2 years

Potterton Promax System 12kW Gas Boiler

The Promax System is a gas boiler this boiler is designed and manufactured by Potterton. It is a condensing wall-mounted unit with many different features and options to help make it the most reliable boiler possible. With this unit coming with an efficiency rating of 89% it is a B-rated boiler, as well as it being in the best class for the N0x which is class 5! This unit comes with a 12kW output to ensure you get maximum efficiency, this range of boilers also include 12kW, 15kW, 18kW, 24kW, and 32kW – with this wide range of outputs making it perfect for fitting into anyone’s home.

It comes with a wide range of other features such as the pre-plumbing jig that helps you to save money on installations. It has a flueing option of up to 20m, helping to offer flexibility in where it can be placed.

It also features a Potterton fully modulating and highly efficient box solution that is developed by robust hydraulic connections. This boiler is also compatible with megaflo solar cylinder and santon premier plus solar cylinders. It boasts a two years warranty.

potterton-promax-system12kw
ttps://www.boilerguide.co.uk/productinfo/potterton/promax-system12kw

Advantages:

  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Compatible with Megaflo Eco Cylinders and Santon Premier Plus Solar Cylinders – increases energy efficiency and improves comfort levels and hot water performance

Disadvantage:

  • 2-year warranty – would prefer a longer standard guarantee

Features:

Band RatingA Rated
ERP RatingA Heat
Central Heating Max. Output12kW
Flow RateN/A
LPG CompatibleNo
MountingWall Mounted
Typical Price (inc VAT)£845
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,345 – £1,845

Product Key Specifications:

MakePotterton
ModelPromax System 12kW Gas Boiler
Is CondensingCondensing
Efficiency Rating89%
Standard Warranty2 years

BUYING GUIDE- Potterton Promax Store Boilers

Given below is a detailed guide on Potterton Boilers:

How Much Does these Boilers Cost?

Potterton’s Promax Store comes in a 90, 115 or 150-litre store, so prices vary between £1,900 and £2,140 according to the size of the store. You also need to consider the fitting cost because this won’t be included in the price of the boiler. Like we always suggest, you should shop around and compare both boiler and installation prices to see whether you can find a good deal. You could even ask suppliers and installers if they’d be willing to beat a price that you’ve found elsewhere so that you can save on these costs.

How long is the Warranty on these Boilers?

If you decide to purchase the Potterton Promax Store, you’ll receive a 2-year parts and labour warranty as standard. To keep the warranty valid, you must register the boiler within 30 days of installation and get it serviced annually.

Does these Boilers have a Good Range of Controls and Features?

The user controls can be found on the front of the boiler and include an LED operating status display, mode selector, integral 7-day twin channel timer and adjustable heating and hot water temperature controls. Because it’s a floor standing unit, Potterton has developed the boiler with a unique roller system so that it’s easy to install and move. It also comes with built-in two-stage frost protection and flue lengths up to 20 meters to allow for greater siting flexibility. What’s more, a simple mounting plate and pre-plumbing jig have been included to enable your engineer to save time on installation.

Are they High Efficiency Boilers?

It sure is. The Potterton Promax Store has an impressive SEDBUK A efficiency rating for heating and hot water, so it will help to cut the cost of your fuel bills. It’s a fully modulating boiler too, meaning it knows how much heat is required at any moment and can automatically adjust its output to meet the set central heating temperature. Plus, the boiler is compatible with Megaflo Eco Solar Cylinders and Santon Premier Plus Solar Cylinders, both of which offer a friendly and efficient way to provide your home with hot water. If you choose to install one of these cylinders, you’ll save you more money on your bills as well.

How will I know if this Boiler is Suitable for My Home?

This boiler is a bit like a system boiler, only it has its own store and doesn’t need a separate cylinder (or any tanks in the loft). It is designed to meet high hot water demands, making it ideal for homes with multiple bathrooms and properties that tend to use a lot of hot water at once. As the Potterton Promax Store is a floor standing boiler, it will require plenty of floor space.

The boiler is available in a 90, 115 or 150-litre store, so it’s suitable for small, medium and large-sized properties. Before you buy this boiler, you will need to consult a Gas Safe registered engineer for help with choosing the correct store option for your home and needs.

What do Industry Experts have to Say?

Potterton Promax is boiler of choice for Doncaster Social Housing overhaul.

As part of a complete refurbishment of social housing in Doncaster, St Leger Homes was looking for a strategic partner to help it cost-effectively install new heating systems in thousands of council-owned properties. Potterton was able to deliver a value-for-money solution to St Leger Homes which simplified installation, repair and maintenance and supported them with market leading aftersales care from its award-winning service division. St Leger Homes has installed almost 4,000 Potterton Promax Combi boilers in the last three years. They have replaced ageing combi boilers, like for like, and they have also been used to replace back boilers.

David Norman, Mechanical and Electrical Manager at St Leger Homes said: “We look after 21,000 homes in the Doncaster area, and as part of the Decent Homes refurbishment scheme, a large number of these properties required improvements to their heating system. With the volume of units involved and the associated installation costs to fit each one, we needed a strategic partner who would be able to offer value for money as well as help us get the boilers installed quickly and efficiently. To really cement the strategic partnership, Potterton has excelled in its aftersales care and support for us. Our installers were given free technical training to ensure each boiler that goes into one of our properties works at its best and that tenants are given the right information about how to use their new heating system to reduce their energy bills. We have also been given direct access to the company’s Customer Support team. This is really important for us as we have target times to respond to maintenance issues, so if there’s a boiler fault that requires an engineer and it’s under warranty, we can call before 3pm and get someone out the next day – guaranteed.” Bill Jones, Sales Director, Potterton, said: “Our partnership with St Leger Homes really shows off our strengths in the social housing market. We have reliable products, at the right price, all backed up with a service that leads the industry and makes our customers feel valued and supported. It’s about making life easier for specifiers, service providers and tenants alike.”

https://www.potterton.co.uk/-/media/websites/pottertonuk/files/potterton_promax_range_guide.pdf

Construction and Material:

List of components:

Cold water control pack including:

Expansion Vessel

Expansion Vessel Bracket

Expansion Vessel Braided Hose with Seals

Pressure Reducing Valve (2.5 bar)

Pressure Relief Valve (8 bar)

Nuts and Olives

Tundish

Bracket

Promax 24 Store is a floor standing condensing combination boiler which incorporates a hot water store to provide domestic hot water (DHW) and central heating (CH). The DHW temperature is user adjustable (e.g. for summer/winter operation). Operation is automatic and the fully modulating pre-mixed burner ensures that gas is burned cleanly and efficiently within the condensing heat exchanger. An advanced burner control includes flame monitoring, pressure monitoring and other safety features, plus status and diagnostic displays which are large and easy to read. Installation of this boiler as an unvented hot water system falls within the scope of the Building Regulations 1995 (Part G). These require that installation of an “unvented% system shall be notified to the local authority Building Control Department; also, that the work must be carried out by a competent person as defined in the Approved Document G3. The above requirements do not apply if hot water is obtained via an open vented feed tank. Samples of the Promax Store gas boilers have been examined by DVGW Technologies Limited, an EU Notified Body. The range is certified to comply with the essential requirements of the Gas Appliance Directive 90/396/EEC, the Low Voltage Directive 72/23/EEC and shows compliance with the Electro Magnetic Compatibility Directive 89/336/EEC, the Boiler Efficiency Directive 9 2/42/EEC and are therefore permitted to carry the CE Mark.

Promax Store boilers are delivered in three packages

(1) the heat engine and unvented accessory kit,

(2) the hot water cylinder and

(3) the flue kit.

The flue kit must be ordered/specified additionally to the boiler

Research & methodologies used behind the in-depth analysis of best Potterton Promax Store Boilers:

Unless indicated, data shown relevant to all models 90 litre 115 litre 150 litre

Classifications  

Appliance category CAT I2H

Flue Type C13 – C33 – C53 (as supplied)

NOx Class 5 (< 70 mg/kWh)

Cylinder Insulation CFC, HCFC = 0%

Input (hot water/central heating) – gross 7.8 – 27.4 kW

Output to CH (non-condensing) 6.8 – 24.0 kW

Output to CH (condensing) 7.6 – 25.9 kW

Inlet pressure 20 mbar

Gas rate (after 10 mins.) 2.6 m3/hr. max.

Gas control differential (offset) -3 Pa to – 8 Pa (- 0.03 to – 0.08 mbar)

CO (average) 70 ppm

Ventilation Requirements: No Compartment Ventilation Required

Connections

CH Flow & Return 22 mm ʻTechtiteʼ/compression

DHW Inlet & Outlet 22 mm tube end

Gas 22 mm compression

Temperature/Press. Relief Valve 22 mm compression from tundish.

Condensate Outlet Flexible Pipe 500 mm long (fits 21.5 mm PP overflow systems)

Inlet Control Group 22 mm compression inlet & outlet Set reduced pressure 2.5 bar; expansion relief valve set 8.0 bar

Filling Loop 15 mm /1/2” union (accessible behind lower front panel

Secondary Expansion Vessel 12 litre, pre-charge 2.5 – 2.7 bar (supplied separately)

Automatic bypass Built in

Pressure loss warning Gauge on facia

Built in programmer 2-channel, pre-programmed, battery back-up, separate times for HW & CH, advance button, CH off selector

External programmer

Built-in room thermostat Dedicated connectors on user terminal block

Built in frost protection Boiler protected below 5 °C

Optional Immersion Heater Heatrae ʻMegaʼ. 3 kW at 240V, Advantica Approved

Electricity supply 230v ~ 3A fused supply

Power Consumption (maximum) 166 Watts (Grundfos pump) 156 Watts (Wilo pump)

Working pressures

Primary 0.9 – 2.5 bar

DHW 1.0 – 2.5 bar

Mains Supply 1.0 – 16.0 bar

Pressure Relief Valve (Primary) 3.0 bar

Temperature/Press. Relief Valve Pre-set 95 °C, 10.0 bar opening

DHW temperature 30 °C to 60 °C

Cylinder Operational Summary

Maximum Mains Pressure 1.6MPa (16 bar)

Operating Pressure/PRV 0.25MPa (2.5 bar)

Maximum Design Pressure 0.8 MPa (8 bar)

Expansion Vessel Charge Pressure 0.25MPa (2.5 bar)

Expansion Relief Valve Setting 0.8MPa (8 bar)

T & P Relief Valve Setting 90 – 95°C/1.0MPa (10 bar)

Pressure Drop (Primary Coil) 0.02MPa (0.2 bar)

https://www.potterton.co.uk/-/media/websites/pottertonuk/files/discontinued-products-pdf/potterton_promax_he_store_install.pdf

Stories from the real-world use cases

real world usage case Best Potterton Promax Store Boilers Available for Home Source :






his popular type of boiler heats hot water as you need it. There is no need to install a hot water cylinder or cold-water tank, as the boiler is connected directly to the water mains – perfect for homes with limited space and a smaller hot water requirement. This type of boiler works together with a hot water cylinder, but usually doesn’t require a cold-water tank, as the system can be filled directly from the water mains. This type of system benefits from having an electric immersion heater within the cylinder which means you can still have hot water even if your boiler breaks down. This type of system is the latest cutting-edge technology to bring you renewable energy and hot water. It is environmentally friendly and energy efficient. via 
Superwarm.co.uk/worcester-bosch-boilers-versus-baxi-potterton
 
Top Reviews
 
Name: Billie
Date and Time of Review: 03/09/2017 at 3:07 pm
Feedback in Detail:
You say Potterton is part of Baxi Group which is part of BDR Thermae. Truly, how can Potterton be the same as years ago!
 
Name: Horace Androv
Date and Time of Review: 04/09/2017 at 7:12 pm
Feedback in Detail:
While useful up to a point it is really just a compilation of information.
 
Name: Nicholas Rybicki-Jones
Date and Time of Review: 09/11/2017 at 3:31 pm
Feedback in Detail:
I have a Potterton boiler, 10 years old, which I don’t consider ancient, considering what the boiler is intended for. It has cost us a small fortune in parts and labour over the years and I am heartily sick of it. I have just paid out over £300 for a new pcb unit for it only for it to run for a day and then have the fan unit pack up. Potterton have advised to change not only the fan but the air pressure switch too as that will almost certainly go after the fan is changed, another £255 including fitting for all that, all this on top of £100’s paid out over the last few months for minor odds and ends going wrong on it. Personally, I will never touch Potterton again. British made used to mean something, sadly not any more.
 
Name: Irving Saunders
Date and Time of Review: 16/11/2019 at 12:25 pm
Feedback in Detail:
Sometimes the two types have been mixed in the following manner: the firebox contains a meeting of water tubes, referred to as thermic siphons. The gases then cross via a traditional firetube boiler.
 
https://plumbersshrewsbury.co.uk/potterton-boiler-review/
 




DID YOU KNOW?


 
·         The average life expectancy for a boiler is between 10 and 15 years. You should ensure that your boiler is maintained properly in order to keep it functioning for as long as possible.
https://www.homeserve.com/uk/living/heating-and-cooling/how-long-do-boilers-last/
·         Potterton boilers are a UK company which have been in business since 1850. They’re known by homeowners and installers alike for reasonable prices, exceptional reliability and the use of top-quality components.
https://heatingforce.co.uk/blog/potterton-boilers/

·         Potterton manufacture upwards of 50 boilers in combination (‘combi’), conventional and system models. Its boilers range in size from 12kW up to 40kW, to meet the heating and hot water needs of different sized homes. The price of Potterton boilers range from around £700 to over £2,500, depending on their size.
https://www.theecoexperts.co.uk/boilers/potterton-boilers

·         Since 1850, Potterton has manufactured its range of boilers in the UK, so you’ll be choosing a British brand with over 160 years of experience. All of the boilers on offer use the latest heating technology, meet energy efficiency requirements and are environmentally friendly and easy to use.
https://www.boilersprices.co.uk/potterton-boilers-prices/

Conclusion:

Surprisingly lightweight, Potterton is fairly large so it will only be a sensible option for homes where storage space isn’t an issue. It does, however, offer siting flexibility because it can be used with a range of flue options and comes with a unique roller system for easy movement.
These boilers are specifically designed for homes with multiple bathrooms and high hot water demands, whether it be a new build property or even a social housing environment. And because Potterton has developed this boiler to make installation really quick and straightforward, you should be able to save some money on the fitting works.
Although a practical solution for certain homes, many engineers have commented that Potterton boilers aren’t as reliable as other well-known boiler brands, such as Worcester Bosch and Vaillant. With this in mind, we recommend you have a chat with an engineer who has previously installed this model to find out if it’s as good as Potterton has said.

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