Book A Free Site Survey
Add Quote to Basket
Instant Online Credit up to £30k*
Track Your Delivery
Create An Account
SKU: UDSA025-4E
NO LONGER AVAILABLE Reznor UDSA025-4E Gas Unit Heater 25Kw Output OBSOLETE 
This product is Obsolete.
MENUMENU
- Products
- Air CurtainsThe over door heaters are an ideal choice for retail or commercial premises, where footfall levels are constantly changing. It’s vital for businesses in the retail or hospitality industry to provide a comfortable environment for customers and employees alike; ensuring a positive workplace and happy customers. We provide a variety of air curtain heaters which include: • Ambient (non-heated) • Electric heating • Low temperature hot water heating As well as a range of sizes and mounting options for larger or smaller openings. Does your premises have frequently opening doorways? Are you struggling to maintain temperatures and energy consumption? Air curtain heaters are designed for discreet positioning in a suspended ceiling or recessed in doorways of retail commercial premises. They create comfortable conditions by providing a powerful down-flow of heated ambient air, reducing heat loss and improving air quality. Over door air curtains are a cost-effective solution, as they compliment existing heating systems by reducing the amount of energy needed to heat your premises. In addition, over door heaters can also reduce outdoor contaminants from entering the premises such as dust or insects, being an all-round effective choice of heating solution. Choose from the following options of reliable air curtains…
- Cabinet HeatersAre you looking for efficient, cost-effective floor standing heaters? Our floor standing heaters combine innovative design with proven heat exchanger technology to provide a high efficiency cost effective and durable range. Perfect for large industrial spaces, the units may be specific for either free blowing applications or for use with ductwork. Gain significant fuel savings and experience the difference We provide a range of heaters including: • Natural Gas (G20), Propane (G31) or Oil fired in both 35-sec grade and Kerosene oil • High efficiency condensing versions are available for all natural gas fired models Choose from the following options of floor standing heaters on this page
- Destratification FansAre you looking to reduce heat loss in your large, open premises? Installing destratification fans are an ideal choice for recycling heat which is lost in high ceiling areas, thus significantly reducing your heating energy bills. Destratification fans reverse the natural convection process, recirculating warm air back to working level. Air Mix high induction air distribution systems provide even distribution of heat across large areas. Destratification fans for industrial and commercial buildings Our destratification fans are perfect for large industrial buildings such as warehousing and workshops, where lots of heat escapes to the tall ceilings. Our products compliment traditional heating systems where keeping warm air at low level can be problematic. The key benefits include: • Reduction of fuel usage up to 15% • Reduced pre-heat time • Improved comfort level for occupants Choose from the following options of destratification and air induction fans on this page
- Flue and AccessoriesLooking for flue and accessories for your heating systems? We have a large range of accessories for your HVAC solutions, including Flues, Flexible Gas Connectors, Service & Installation kits and more. Looking for a particular HVAC part or spare? Then head over to our parts finder for a quick and easy purchase.
- Heat PumpsHeat Pumps for Industrial and Commercial Premises LIRA air-to-air heat pumps are an ideal choice for commercial and industrial environments where year-round heating and cooling climate control is essential. Whether you manage a showroom, warehouse, or manufacturing facility, maintaining a comfortable and energy-efficient space is crucial—for both productivity and operational costs. We provide a range of LIRA heat pump solutions which include: • Free-blowing indoor units • Ducted indoor models • Cooling capacity up to 42 kW with an EER of 4.00 As well as systems suitable for a variety of building sizes and layout requirements. Are you looking for an efficient, reliable solution for both heating and cooling? LIRA heat pumps are designed with European climates in mind, offering reliable performance even in harsh winter conditions. With a variable-speed scroll compressor and advanced injection technology, the LIRA outdoor unit continues to operate efficiently in temperatures as low as -20°C. Being an air-to-air system, LIRA units exchange heat directly between outdoor and indoor components using refrigerant. This removes the need for hydraulic circuits—eliminating the risk of freezing and reducing thermal inertia—making it possible to quickly respond to changing temperature demands. Indoor units are engineered with low-noise fans to ensure a…
- Heating and VentilationReznor is a leading manufacturer and supplier of high-performance direct gas-fired heating and make-up air solutions, designed for industrial, commercial buildings. With unmatched engineering expertise, Reznor provides the perfect heating, ventilation, and air make-up solutions tailored to meet the specific requirements of any application. Our direct gas-fired technology has been widely adopted in various industries, including agriculture, food preparation, and industrial processes. Custom Solutions for Every Application At Reznor, we cater to the needs of end users, specifiers, and contractors by offering comprehensive services, including free site surveys and system designs, commissioning, and on-site technical support. Our expert team ensures that each project is backed by in-depth technical knowledge and a commitment to delivering the best possible solutions including ultra lox NOx gas fired heat modules, heating ventilation and cooling as well as direct/indirect fired systems Made bespoke, to suit every environment with a variety of fuel options including Natural Gas, LPG, Kerosene & Oil* Efficient Direct Gas-Fired Heating Technology Direct gas-fired heating is a highly effective and cost-efficient method of space heating, particularly in open or large areas. This technology provides an optimal ventilation rate by gently pressurizing the building, ensuring a consistently fresh and…
- Plaque HeatersChoose our range of electric and gas fired radiant plaque heaters, ideal for use in a wide range of applications You can utilise plaque heaters for safe and efficient heating in large, open spaces such as churches, sports halls and warehouses. As the heaters are unflued gas-fired, infrared heaters they are suitable for areas of high air filtration, high ceilings and spot heating. By choosing from our efficient range of plaque heaters you can gain key benefits such as: • Ceramic burner with maximum infrared radiation • Direct spark ignition • Stainless steel burner box and reflector design • User-friendly and low maintenance • Particular ranges can be paired with our SmartCom3 control panel Choose from the following options of radiant plaque heaters on this page
- Radiant HeatersAre you looking for radiant tube heating for industrial and commercial buildings? Our range of high-efficiency radiant tube heaters deliver exceptional performance in terms of efficiency and reduction of energy costs. Ideal for large spaces, such as warehousing, factories or workshops, continuous radiant tube heating systems are specifically designed by our experienced in-house engineering team for the building it is required to heat. Why choose radiant heating systems? Reznor’s gas fired, propane and oil-fired radiant heaters provide targeted and instant coverage by directly heating objects and places to avoid heat wastage. Our Vision, Sonning & Nor Ray Vac system deliver efficiency using infrared waves that provides consistent and uniform heat, regardless of if doors or shutters are open. Our high-quality manufacturing process and sourced materials provide a high degree of functionality and longevity within the product range. A range of electric and gas fired radiant heating in various configurations Our radiant tube heating range caters to all types of large open buildings, with key benefits such as: • Increases thermal efficiencies by up to 90% • Applications including areas of high air filtration, high ceilings and spot heating • Bespoke installation with experienced Reznor engineer team for more complex solutions…
- Warm Air Unit HeatersChoose our efficient warm air heaters for industrial and commercial buildings Warm air unit heaters are a viable, sustainable option for large buildings such as warehouses and industrial workshops – providing a comfortable environment for all. Suspended gas fired and electric unit heaters are a technically advanced range of warm air heaters – designed to deliver outstanding energy efficiency, performance and economy for reduced operating and life cycle costs. Our range of warm air heating can bring cost-saving benefits By choosing one of our unit heaters, you can achieve the following: • Up to 35% energy saving on replacement heaters (RHeco units) • Long life expectancy • Easy installation and maintenance Choose from the following options of heaters on this page
- Air CurtainsThe over door heaters are an ideal choice for retail or commercial premises, where footfall levels are constantly changing. It’s vital for businesses in the retail or hospitality industry to provide a comfortable environment for customers and employees alike; ensuring a positive workplace and happy customers. We provide a variety of air curtain heaters which include: • Ambient (non-heated) • Electric heating • Low temperature hot water heating As well as a range of sizes and mounting options for larger or smaller openings. Does your premises have frequently opening doorways? Are you struggling to maintain temperatures and energy consumption? Air curtain heaters are designed for discreet positioning in a suspended ceiling or recessed in doorways of retail commercial premises. They create comfortable conditions by providing a powerful down-flow of heated ambient air, reducing heat loss and improving air quality. Over door air curtains are a cost-effective solution, as they compliment existing heating systems by reducing the amount of energy needed to heat your premises. In addition, over door heaters can also reduce outdoor contaminants from entering the premises such as dust or insects, being an all-round effective choice of heating solution. Choose from the following options of reliable air curtains…
- Spares
- Resources and Support
- Resource and Support
- Solutions / Applications
- Case Studies
West Midlands Safari Park – Elephant Enclosure
Long Rock Train Maintenance Depot
University of Hull – New Sports Centre
Tiger Trailers
Sambreville Fire Station Case Study
Derby Football Club Case Study
Worcester Warriors Rugby Club Case Study
SEW Autodrive Case Study
Network Rail, Botanical Gardens Depot Case Study
Porter & Rye Case Study
First Direct Arena Case Study
Audi Case Study
- Resource and Support
- Contact Us
- Contact Us
Nortek Global HVAC
Fens Pool Ave,
Brierley Hill
DY5 1QA,
Brierley Hill,
United Kingdom+44 1384 489700
reznor.online@nortek.com
reznorsales@nortek.com
- About
- Contact Us
MENUMENU
- Products
- Air CurtainsOver door heaters for retail and commercial premises The over door heaters are an ideal choice for retail or commercial premises, where footfall levels are constantly changing. It’s vital for businesses in the retail or hospitality industry to provide a comfortable environment for customers and employees alike; ensuring a positive workplace and happy customers. We provide a variety of air curtain heaters which include: • Ambient (non-heated) • Electric heating • Low temperature hot water heating As well as a range of sizes and mounting options for larger or smaller openings. Does your premises have frequently opening doorways? Are you struggling to maintain temperatures and energy consumption? Air curtain heaters are designed for discreet positioning in a suspended ceiling or recessed in doorways of retail commercial premises. They create comfortable conditions by providing a powerful down-flow of heated ambient air, reducing heat loss and improving air quality. Over door air curtains are a cost-effective solution, as they compliment existing heating systems by reducing the amount of energy needed to heat your premises. In addition, over door heaters can also reduce outdoor contaminants from entering the premises such as dust or insects, being an all-round effective choice of heating solution. Choose…
- Cabinet HeatersAre you looking for efficient, cost-effective floor standing heaters? Our floor standing heaters combine innovative design with proven heat exchanger technology to provide a high efficiency cost effective and durable range. Perfect for large industrial spaces, the units may be specific for either free blowing applications or for use with ductwork. Gain significant fuel savings and experience the difference We provide a range of heaters including: • Natural Gas (G20), Propane (G31) or Oil fired in both 35-sec grade and Kerosene oil • High efficiency condensing versions are available for all natural gas fired models Choose from the following options of floor standing heaters on this page
- Destratification FansAre you looking to reduce heat loss in your large, open premises? Installing destratification fans are an ideal choice for recycling heat which is lost in high ceiling areas, thus significantly reducing your heating energy bills. Destratification fans reverse the natural convection process, recirculating warm air back to working level. Air Mix high induction air distribution systems provide even distribution of heat across large areas. Destratification fans for industrial and commercial buildings Our destratification fans are perfect for large industrial buildings such as warehousing and workshops, where lots of heat escapes to the tall ceilings. Our products compliment traditional heating systems where keeping warm air at low level can be problematic. The key benefits include: • Reduction of fuel usage up to 15% • Reduced pre-heat time • Improved comfort level for occupants Choose from the following options of destratification and air induction fans on this page
- Flue and AccessoriesLooking for flue and accessories for your heating systems? We have a large range of accessories for your HVAC solutions, including Flues, Flexible Gas Connectors, Service & Installation kits and more. Looking for a particular HVAC part or spare? Then head over to our parts finder for a quick and easy purchase.
- Heat PumpsHeat Pumps for Industrial and Commercial Premises LIRA air-to-air heat pumps are an ideal choice for commercial and industrial environments where year-round climate control is essential. Whether you manage a showroom, warehouse, or manufacturing facility, maintaining a comfortable and energy-efficient space is crucial—for both productivity and operational costs. We provide a range of LIRA heat pump solutions which include: • Free-blowing indoor units • Ducted indoor models • Cooling capacity up to 42 kW with an EER of 4.00 As well as systems suitable for a variety of building sizes and layout requirements. Are you looking for an efficient, reliable solution for both heating and cooling? LIRA heat pumps are designed with European climates in mind, offering reliable performance even in harsh winter conditions. With a variable-speed scroll compressor and advanced injection technology, the LIRA outdoor unit continues to operate efficiently in temperatures as low as -20°C. Being an air-to-air system, LIRA units exchange heat directly between outdoor and indoor components using refrigerant. This removes the need for hydraulic circuits—eliminating the risk of freezing and reducing thermal inertia—making it possible to quickly respond to changing temperature demands. Indoor units are engineered with low-noise fans to ensure a quieter and more…
- Heating and VentilationReznor is a leading manufacturer and supplier of high-performance direct gas-fired heating and make-up air solutions, designed for industrial, commercial buildings. With unmatched engineering expertise, Reznor provides the perfect heating, ventilation, and air make-up solutions tailored to meet the specific requirements of any application. Our direct gas-fired technology has been widely adopted in various industries, including agriculture, food preparation, and industrial processes. Custom Solutions for Every Application At Reznor, we cater to the needs of end users, specifiers, and contractors by offering comprehensive services, including system design, installation, and on-site technical support. Our expert team ensures that each project is backed by in-depth technical knowledge and a commitment to delivering the best possible solution. Efficient Direct Gas-Fired Heating Technology Direct gas-fired heating is a highly effective and cost-efficient method of space heating, particularly in open or large areas. This technology provides an optimal ventilation rate by gently pressurizing the building, ensuring a consistently fresh and warm environment with minimal temperature variation. Reznor’s fully modulating burner system adjusts to deliver the exact heat needed at maximum efficiency, helping to reduce running costs and energy consumption. In-direct gas fired solutions are also available as we offer bespoke packages…
- Plaque HeatersChoose our range of gas fired radiant plaque heaters, ideal for use in a wide range of applications You can utilise plaque heaters for safe and efficient heating in large, open spaces such as churches, sports halls and warehouses. As the heaters are unflued gas-fired, infrared heaters they are suitable for areas of high air filtration, high ceilings and spot heating. By choosing from our efficient range of plaque heaters you can gain key benefits such as: • Ceramic burner with maximum infrared radiation • Direct spark ignition • Stainless steel burner box and reflector design • User-friendly and low maintenance • Particular ranges can be paired with our SmartCom3 control panel” Choose from the following options of radiant plaque heaters on this page
- Radiant HeatersAre you looking for radiant tube heating for industrial and commercial buildings? Our range of high-efficiency radiant tube heaters deliver exceptional performance in terms of efficiency and reduction of energy costs. Ideal for large spaces, such as warehousing, factories or workshops, continuous radiant tube heating systems are created specifically for the building it is required to heat. They are designed to provide uniform heat coverage over the entire floor area with the ability for the system to cater for distinct zones. A range of electric and gas fired radiant heating in various configurations Our radiant tube heating range caters to all types of large open buildings, with key benefits such as: • Increases thermal efficiencies by up to 90% • Applications including areas of high air filtration, high ceilings and spot heating • Bespoke installation with experienced Reznor engineer team for more complex solutions Choose from the following options of radiant heaters on this page
- Warm Air Unit HeatersChoose our efficient warm air heaters for industrial and commercial buildings Warm air unit heaters are a viable, sustainable option for large buildings such as warehouses and industrial workshops – providing a comfortable environment for all. Suspended gas fired unit heaters are a technically advanced range of warm air heaters – designed to deliver outstanding energy efficiency, performance and economy for reduced operating and life cycle costs. Our range of warm air heating can bring cost-saving benefits By choosing one of our unit heaters, you can achieve the following: • Up to 35% energy saving on replacement heaters (RHeco units) • Long life expectancy • Easy installation and maintenance Choose from the following options of warm air unit heaters on this page
- Spares
- Applications
- Resource and Support
- About
- Articles
- Contact
