LEWH is nothing but reverse air conditioner, the only difference is we use it for heating instead of cooling. As we use it in heating mode it is highly efficient.
It’s not suggested. No heating equipment should be used 24 hours a day. If we run LEWH whole day, the life span will be reduced. Also LEWH is same as air Conditioner so it’s advisable to use around 8 hours so as to maximize the life. Clever use of a LEWH is using it as required.
LEWH is four to five times efficient as compared to electric heaters, boilers, oil or diesel fired equipments. It uses atmospheric heat which is heated by Sun and hence only little amount of electricity is required to run the compressor.
It is Co-efficient of Performance. This term is used to measure the energy efficiency of a LEWH system. For example - a COP of 4 indicates that for every kW of energy input to the LEWH system it will deliver 4 Kw of equivalent electrical energy out in the form of LEWH
As ambient temperature increases the COP also increases. It is generally 4-5 at ambient temperature of 20 degree Celsius. It reduces to around 2.5 as temperature reaches to 0 degree Celsius. Also it is more when temperature difference between two heat-exchanging fluids is more
A yearly or half yearly inspection of the installation is needed for safe operation, longer life and efficiency. Mainly servicing includes checking water pressure, pressure valves, shut off valves, Non return valves, Filter or strainer, control box and cleaning of Fins an Fan for any dirt. An inspection should be done from Experts, servicing people from Air conditioner field is advisable.
Yes, because at the exhaust of LEWH it gives cool air. But to divert cool air via duct is not much practical as it will include heat loss and the results will not be that much satisfactory.
All LEWHs will perform a defrost cycle eventually when operating in cold winter conditions. The defrost mode removes ice build up from the outdoor unit in winter season sub zero temperatures. In defrost mode the LEWH stops heating for short periods.
Hotels – Because space is very important for hotels more over when it comes to terrace. Also hotels require hot water 24 hours 365 days, may it be cloudy/rainy or winter season. LEWH require very less space and it can even be kept inside or ground floor.
Swimming Pools - because no other technology is as successful as LEWH in heating swimming pool. Also there is lack of space to install solar to heat such huge quantity of water every day.
Metro cities – Main reason Lack of space, so only option is LEWH
High altitude areas/Northern Parts of India – The reason here is lack of radiation from sun, Also in winter season there is fog all over so almost no sunshine available. Hence LEWH is very cost effective solution.