Knowledge Base & Product Guides
Your comprehensive resource for heating and hot water solutions. This knowledge base contains expert guidance, technical documentation, and practical advice for all Flexiheat UK products including boilers, water heaters, air curtains, unit heaters, and MVHR systems.
Whether you’re a homeowner, installer, or commercial facility manager, you’ll find detailed information on:
From 50kW combi boilers and commercial water heaters to industrial air curtains and portable heating solutions, our knowledge base provides the technical expertise and practical guidance you need to make informed decisions. This helps you maintain optimal performance from your Flexiheat UK heating systems.
For additional support beyond our knowledge base, contact our expert team at 01202 822221 or sales@flexiheatuk.com
Direct Pressurised Hot Water Cylinders for Efficient Domestic Hot Water Heating Direct pressurised hot water cylinders are the most popular electric powered water heater or electric heating hot water system on the UK market. Introduction to direct hot water cylinders Direct hot water cylinders heat water using electrical immersion heaters within the cylinder itself. Direct […]
Buffer Vessel Sizing for Hydronic Heating Systems Buffer vessels are essential components in hydronic heating systems, providing thermal storage capacity that improves system efficiency, reduces equipment cycling, and enhances overall performance. Proper sizing of these vessels is critical to achieving optimal system operation. This guide covers the principles, calculations, and considerations necessary for correctly sizing […]
Pressurised hot water cylinders – what are they? Pressurised hot water cylinders, also known as unvented cylinders, are storage tanks that supply pressurised hot water to homes without relying on gravity. These systems are connected directly to the mains water supply; thus, they are a pressurised system, which allows them to provide hot water at […]
Boiler low gas pressure? Boiler low gas pressure? Some boilers have problems with not having enough gas pressure. These problems aren’t always dangerous or common, but they can happen, especially in newer heating systems and result in low gas pressure to your boiler. This is more noticeable when an installer or service worker goes […]
Can I fit a waste or multi oil burner to my existing boiler? A Kroll KG/UB waste or multi oil burner from Flexiheat UK is a great way to significantly reduce your heating costs. With its ability to burn almost any used oils from waste engine oils and hydraulic oils to used vegetables oils and […]
A Chilled Water Buffer Tank Sizing Guide for Optimal System Performance If you’re looking for the best approach to sizing a chilled water buffer tank or vessel, you’ve most likely seen chillers cycle because the buffer vessel or tank is too small. Have you ever been annoyed by temperatures that fluctuate as your load changes? […]
For your heat pump system, is a thermal buffer tank necessary? A buffer vessel, sometimes referred to as a buffer tank or thermal storage tank, is an element that enhances the performance and efficiency of most air source heat pump (ASHP) systems. In essence, the buffer vessel is a thermal reservoir comprised of a tank […]
Air Curtain Basics | What is an Air Curtain + How Does It Work? A device that creates an air barrier across a door’s whole opening to divide two environments is called an air curtain. Typically, the air curtain keeps flying insects, odours, humidity, dust, and debris out of the conditioned interior air and […]
Destratification – What is it ? Destratification is the opposite of the natural process of thermal stratification in HVAC systems, which is the layering of different (usually increasing) air temperatures from floor to ceiling. Thermal stratification occurs when heated air rises to the ceiling or roof space or area because it is lighter than […]
Boiler flow temperature Boiler flow temperature ? hot water heating systems in newly constructed homes or commercial buildings must now be designed to operate at a maximum flow temperature of 55°C as a result of changes to the Building Regulations. The low flow temperature information The latest revisions to Part L of the Building Regulations […]
Flexiheat UK
Flexiheat UK
Flexiheat UK