Information for customers purchasing towel warmers
Before purchasing a towel warmer, customers usually have questions about which option is the most suitable for them, and how to install the warmer properly because not every plumber can give proper recommendations.
Before buying the warmer, it is necessary to know the heating system that it will be installed in.
1. In a closed central heating system the warmer will only work during the heating season. The water in this system is low on salt, not saturated with oxygen, and can be enriched with materials that calm chemical reaction. In this case, the warmers of any metal type can be installed, including black or stainless steel, brass or copper. If the usual form of dryer-coil is installed, it will heat only during the heating season. But if you install a ladder-shaped warmer into your heating system, you will have a chance to use it all year round. This type of heating is called combined heating. The heating element, that should be installed in one of the ladders’ connection points, can be various types (with regulated or electronically/mechanically maintained temperature) and can be installed in the selected side of the warmer. In the other connection point you can install the following:
A. Setup node for water supply and outlet.
B. Balancing valve controlled by a knob.
At the end of the heating season, the balancing valve or the shut-off valve is closed, and the heating element is plugged into an electrical outlet. In this case only the water in the ladders will be heated, and you will have a type of electrical heating. Since the warmer will operate as an electrical device, it is very important that the electrical outlet is installed in accordance with all safety requirements, i.e. keeping the safe distance from water devices that are in the bathroom: faucets, shower, etc. It is also important to note that the heater should be installed vertically in the ladder-shaped warmer. If you plan to install it horizontally, you need to precisely follow manufacturer’s instructions on specific heater models and warmer shapes. In this case it is recommended to seek professional advice.
Heaters cannot be installed into regular wave-shaped warmers.
2. When you have an open (potable) hot water circulation system, the warmer is heating both in winter and in summer. It is important to note that this type of water has dissolved calcium and magnesium salts, and is saturated with oxygen. In this type of system it is not advisable to install ladders with welded seams because water salt, which accumulates in the seams, can cause corrosion. In this case, it is recommended to install wave-shaped warmers made of stainless steel, brass or copper pipes. It is advisable that the pipes of these metals are seamless (without welded seams).
Ladder-shaped towel warmers that have welded seams will not be suitable in this case.
It is important to note that if the open hot water circulation system has pipes of different metals installed in it, and the warmer is not properly grounded, the possibility of corrosion (narrower concept – electrochemical corrosion) increases.
A more extensive description of electrochemical corrosion and proper grounding of hydronic towel warmers can be found HERE
3. Another widespread heating method is electricity. It can be divided into two options:
A. Heater is screwed into the usual ladder-shaped or other type of warmer, and the inside of the warmer is filled with special fluid for heating systems (e.g. ethylene glycol with the freezing temperature of – 35 °C or < – 40 °C; ).
B. Warmer is heated by the heating cable. Because it acts as an electrical device, it has to meet all safety requirements during the period of installation and exploitation.
The instructions on how to properly install electric warmer can be found HERE.