Business Details
Trusted HVAC Solutions in Barrhead
Established in 1878, McCallum Water Heating has built a legacy of excellence in designing and manufacturing water heating solutions. Our expertise spans over 140 years, serving diverse sectors including government, healthcare, education, and hospitality. We specialise in calorifiers, plate heat exchangers, solar thermal systems, and packaged heating solutions, tailored to meet rigorous industry standards. Our ISO 9001-certified processes ensure precision in every project, from conceptual design to installation. With a focus on innovation, we integrate advanced technologies like anti-legionella controls and energy-efficient heat exchangers.Our team of skilled engineers delivers bespoke systems for commercial, industrial, and district heating applications. Committed to sustainability, we offer renewable energy solutions, including solar panels manufactured in Scotland. We provide comprehensive repair, refurbishment, and compliance services to align with HSE guidelines. Our reputation for reliability is underscored by a 100% client-focused approach and rapid turnaround times. As a trusted partner, we combine heritage with modern engineering to address evolving industry challenges.
Services
Calorifiers
Plate Heat Exchangers
Solar Thermal Systems
Heat Interface Units
Thermal Storage Vessels
Direct Fired Water Heaters
Packaged Systems
Ancillaries
Repairs
Upgrades
Highlights and features
- We have over 140 years of experience in water heating system design and manufacturing.
- Our ISO 9001 certification ensures rigorous quality control across all operations.
- We offer bespoke solutions for commercial, industrial, and district heating applications.
- Our engineers provide rapid repair and refurbishment services with minimal downtime.
- We comply with HSE guidelines for legionella control in all heating systems.
Associations and certifications
- ISO 9001
Services
Calorifiers
McCallum's calorifiers provide efficient hot water solutions for commercial and industrial applications. Available in storage, semi-storage, and non-storage configurations, these units comply with BS853 and ASME standards. Constructed from copper, stainless steel, or mild steel, they support steam or hot water primary mediums with capacities up to 15,000 litres.
Plate Heat Exchangers
Our plate heat exchangers deliver compact, high-efficiency thermal transfer for HVAC and industrial processes. The HT-Breeze range offers outputs from 0.25 to 5.00 litres/second with advanced controls, while the Vari-E-Breeze integrates variable-speed pumps for energy savings and precise temperature regulation.
Solar Thermal Systems
McCallum's solar thermal systems combine flat plate and evacuated tube collectors with twin-coil cylinders for domestic and industrial hot water. Designed for UK climates, these systems feature 25+ year durability, 85% instantaneous efficiency, and integration with existing heating infrastructure to reduce carbon emissions.
Heat Interface Units
The Hiper HIU series enables efficient heat distribution in district networks, providing instantaneous hot water and central heating without combustion. Features include PID temperature control, low-return temperatures for network efficiency, and compatibility with renewable energy sources like biomass boilers.
Thermal Storage Vessels
Custom thermal storage vessels, ranging from 100 to 67,000 litres, optimise heat retention in district heating and biomass systems. Constructed from mild steel, copper, or stainless steel, these vessels ensure consistent heat supply and integrate with solar thermal or combined heat and power (CHP) systems.
Questions
What types of calorifiers do you offer?
We provide storage, semi-storage, and non-storage calorifiers in copper, stainless steel, or mild steel, with capacities up to 15,000 litres, compliant with BS853 and ASME standards.
Are your heat exchangers energy efficient?
Yes. Our HT-Breeze and Vari-E-Breeze ranges feature advanced controls, anti-legionella cycles, and variable-speed pumps to maximise efficiency and reduce running costs.
Do you supply solar thermal systems?
Yes. We offer flat plate and evacuated tube collectors with twin-coil cylinders, designed for UK climates and compatible with existing heating systems.
Can you repair existing heating systems?
Yes. We refurbish calorifiers, heat exchangers, and air heaters, and retrofit systems to meet HSE legionella control guidelines.
What sectors do you serve?
We serve government, healthcare, education, hospitality, and industrial clients with tailored heating solutions for commercial and district heating applications.
Are you ISO certified?
Yes. Our ISO 9001-certified quality management system ensures rigorous standards in design, manufacturing, and customer service.
