HomEvap by Humidity Solutions Ltd
Launched in the UK in the spring of 2019, this product provides humidity control and/or cooling to a domestic property usually via a heat recovery unit or an office directly into the space. A heat recovery unit provides outside air into the normally airtight new domestic properties built today. Whilst providing an air change and recovering heat from the stale extracted air, currently no consideration is typically given for adding humidity or cooling. The HomEvap provides humidity and maximum of 1.5kw cooling at 500m3/hr for around 15w of energy.
Key features – the HomEvap uses the natural process of water evaporation to add water to the airflow. In the case of the humidifier this is after the HRU in the warm air supply to the house which facilitates the evaporation. A built-in modulating controlled heater can be added to overcome the cooling effect of the adiabatic process if required (0.9kw). The LegioSafe water filter and flushing sequence, and also the mechanically restricted waterflow, are standard to guarantee healthy and safe operation.
In Summer, the cooling unit is positioned in the air extract prior to the HRU. The adiabatic cooling process cools the air and this reduction in temperature is transferred via the HRU to the incoming air, providing a maximum of 1.5kw of cooling for 15w of energy.
Both units regulate the water supply to ensure optimal efficiency of water consumption – minimal water goes to drain- and come with the required sensor and controller which is wirelessly connected to the HomEvap.
Energy efficiency – very low energy. 15w for the humidifier or a maximum of 900w if you include the modulating controlled energy efficient heater. This can evaporate up to 4 litres of water per hour. A similar output steam humidifier would require 3kw of energy. Cooling unit is 15w to generate up to 1.5kw of cooling at 500m3/hr, and if cooling demand is increasing the electrical consumption is NOT.
Comparisons – this is a unique product and does not have a competitor in the UK market that uses this type of advanced combination of technology and sustainability. The running costs are low as previously explained with water usage kept to that quantity that is required to be evaporated. The consumables are the evaporative media which is contained in an easy to exchange cassette housing of environmentally friendly EPP. The media will become scaled with the minerals contained in the mains water supply after a period of operation. The replacement of this cassette varies with usage and water quality, but we would recommend it is changed once per year to ensure a healthy and carefree humidification and efficient cooling. This includes the LegioSafe, the certified water filter.
Environmental – The HomEvap uses far less energy than a similar duty humidifier or air conditioning unit. Design of the housing is made of recycled EPP, the construction is simple so uses less materials and is refrigerant free. Production of components is locally sourced, all to reduce the carbon footprint as low as possible, throughout the product life cycle.
Applications- this product has been targeted at HRU unit manufacturers and suppliers as well as builders of developments. Apartments have shown an interest as they are not able to open windows so to provide a better condition the Homevap delivers treated air into the property.
End users with static complaints, respiratory problems (COPD) or sensitive to influenza viruses will benefit from a proper humidity. Houses with wooden floors which crack and distort if not kept at the correct moisture content, or where antique objects are kept such as rare books, musical instruments and laminated or inlayed furniture.
Offices with low humidity can affect the wellbeing of occupants by reducing the effectiveness of the body’s built in defence system which is the mucus membrane. This membrane dries out in low humidity environments making us more susceptible to viruses, colds and bacteria. Eczema and other irritations from dry skin conditions can be increased in low relative humidity, and sore eyes (particularly for contact lens wearers) and headaches are other frequent complaints.
Care homes, where residents may become increasingly dehydrated due to low humidity and evaporation from the surface of the skin, and are particularly susceptible due to their limited ability to move around. In addition, residents may feel cooler as the moisture evaporation is part of the body’s inbuilt cooling system – this often means that the room temperature is increased which further reduces the humidity and human discomfort and so we go on.
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Figure 1: Effect of pathogens, microbes, and environmental contaminants on human beings. From Sterling et al. (1985).
Figure 2. The percent infectivity of airborne influenza at a constant temperature (20°C, 68°F). Curve shows all size fractions (>4 µm, 1–4 µm, and <1 µm). From Noti et al., 2013.