RM Stelflow Unvented Cylinder Review: Horsham Plumber's View

As Andrew Tyler of Prime Boiler Care, a trusted heating engineer covering the Horsham and Adur Districts in West Sussex, I always prioritise quality, reliability, and efficiency for my customers. 

My latest installation of an unvented hot water cylinder gave me a pleasant surprise, and I wanted to share my professional opinion with homeowners throughout Horsham, Southwater, Broadbridge Heath, Slinfold, and the wider West Sussex area.

The job involved fitting a 250 litre RM Stelflow indirect unvented hot water storage cylinder. 

I didn't have high expectations. 

The unit was specified and supplied by the customer, having been purchased from Screwfix for approximately £716. 

I hadn’t had extensive experience with RM unvented cylinders before this, so I approached the installation of this 250 litre model with an open mind.

I can confirm that the installation process for the RM Stelflow cylinder was very straightforward. 

The unit itself is cleanly designed and visually appealing. 

More importantly, the internal and external components demonstrated solid build quality, which immediately instilled confidence. 

The included expansion vessel, for example, was of a high quality, and all the supplied fittings and fixings were robust and excellent for the job.

What truly impressed me was the performance after commissioning. 

The heat recovery rate on this 250 litre unvented cylinder was exceptionally fast—faster than I had anticipated for a unit at this price point. 

Fast heat recovery is crucial for busy households in areas like Billingshurst, Steyning, Storrington, and Henfield, ensuring you never run out of hot water, even after high-demand usage. 

The electrical components were also of good quality and easy to wire, making the final stages of the unvented cylinder installation in West Sussex quick and efficient.

Based on this successful experience and the cylinder's impressive specifications—including a high 3 bar pressure rating, 50mm of insulation, and a strong 25 Year Manufacturer Guarantee (T&Cs Apply)—I would absolutely consider the RM Stelflow range for future unvented hot water cylinder replacements or new installations across my service area, which includes Ashington, Rudgwick, Cowfold, Pulborough, and Upper Beeding.

Key Product Specifications from the Horsham Installation:

• Capacity: 250 Litres (Ideal for larger families in Partridge Green and Rusper)

• Max Bar Pressure: 3 bar

• Insulation Type: 50mm High-Efficiency Foam

• Manufacturer Guarantee: 25 Years (T&Cs Apply)

• Dimensions: 545 mm Diameter, 1728 mm Height

If you live in Horsham, Adur District, Bramber, Warnham, Faygate, or anywhere in between and are considering a new or replacement unvented hot water cylinder, contact Prime Boiler Care. 

I am committed to providing honest, professional advice and expert installation service for all your domestic hot water needs.