Calpak is one of Europe’s leading manufacturers of hot water cylinders, with over 40 years of expertise in engineering and production. The company’s factory is equipped with state-of-the-art robotic automated welding systems, and every cylinder is rigorously pressure tested to 13 bar to ensure durability and safety. The advanced technology used in these cylinders is protected by a worldwide patent, offering innovation that sets Calpak apart in the industry. Unlike traditional systems, Calpak cylinders require no replacement anodes or servicing to maintain their 10-year warranty, making them both reliable and low-maintenance. What truly distinguishes this technology is its ability to deliver hot water just 1°C below the storage temperature, allowing water to be stored at much lower levels while still maintaining high output performance. This unique feature results in significant energy efficiency, reducing the cost of heating hot water by at least 25%.
Why We Trust Calpak Ultratank
Over 40 years of European engineering excellence
Patented counterflow technology for near-instant hot water
25% energy savings compared to traditional cylinders
10-Year No-Quibble Warranty
How It Works
Heat Source Connection
Multiple heat sources connect directly to the steel cylinder, with no coils or flow restrictions for faster heating.
Counterflow Technology
A patented pipe-in-pipe system transfers heat instantly, keeping outlet water hot even at lower storage temperatures.
Energy Savings
Faster heating and lower storage needs cut hot water costs by at least 25% compared to traditional cylinders.
Consistent Supply
Cold water in at 10°C, hot water out at ~59°C—delivering a steady flow for showers and appliances
Calpak UltrantX
Coils manufactured from 316L Stainless Steel
Almost zero deviation between charging and supply temperature
Very fast charging of the ultratank compared to conventional cylinders
Suitable for use with solid fuel, oil, gas boilers and heat pumps
Endless hot water at the desired temperature
Top performance rate (99%) giving 25% in energy savings
Very long life span with no maintenance requirements
Fresh and clean water supply free of any bacteria such as Legionella
Easy installation or replacement of existing cylinder
Easy system expansion with new energy sources
Ideal for domestic & commercial applications with increased hot water availability
10 year manufacturer warranty on cylinder
Advantages for Our Customers
Lower energy bills (99% efficiency)
Endless hot water on demand
Future-proof system — expand with new energy sources
Legionella-free, clean water supply
Heat Pump Grants in Ireland
Did you know you may be eligible for an SEAI grant when installing a heat pump system with a high-efficiency hot water cylinder? Pairing a Calpak Ultratank with a heat pump through EnergieXPro can reduce your upfront costs and deliver maximum long-term savings.
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SEAI grants up to €6,500 available
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We handle the paperwork and guidance for you
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Future-proof your home with renewable hot water
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SEAI grants up to €6,500 available
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We handle the paperwork and guidance for you
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Future-proof your home with renewable hot water
Send Us Email
Call For Services
Visit Our Location
20 Doctor Mannix Road, Salthill, Galway, H91 TYA5
Testimonials
What our clients say about us
EnergieXPro® provided us with a high-quality turnkey project, that included a 160kW solar system, a battery storage system, EV car charger stations, and LED lights fitted throughout our plant in Gort. I would recommend EnergieXPro® to all businesses that are willing to reduce grid-wide energy consumption, make their manufacturing energy self-sufficient, and reduce their carbon footprint.”
Seamus Brady
Founder and MD of Gastle Group
Absolutely brilliant to deal with from start to finish. Very professional and installation was on time and finished to a very high standard. All staff could not do enough for us. Now let the sun shine.
Dermot Moran
A Satisfied Client
"Couldn't recommend enough, great company to deal with and very transparent on all communication's, left the place spotless after themselves. Went above and beyond when they found a previous fault in my electrical system and took it upon themselves to fix it although it was nothing to do with them.
Definitely 5 stars, great bunch of lads."
Paul Tierney
A Satisfied Client
We recently had Solar Panels installed by EnergieXPro. To say we are absolutely delighted with our solar panel installation by EnergieXPro is an understatement for sure.
We couldn't be happier with the entire process, from start to finish, Ger and the team at EnergieXPro were professional experts and the after sales customer service 2nd to none, Ger the owner of the company called out after hours to demonstrate something we couldn't quite grasp at the outside, Ger gave us expert advice from the consultation process right up to the proposal, which was detailed, transparent and competitive in pricing.
Mary Lynch
A Satisfied Client
EnergieXPro - quick service, very professional and trustworthy.I could not be happier with the results and solars on my roof.Thank you guys.
Aneta Topkaya
A Satisfied Client
