Abstract: As a new heating equipment for this year, the Multi-connected low ambient temperature air source heat pump air heaters has been widely recognized by the industry people for its low price, near zero cost maintenance and high efficiency and energy saving, but most users have little solution to the Multi-connected air heaters, and the market lacks a unified evaluation. In order to make the users understand the functions of the Multi-connected air heaters and the evaluation system of the market, this paper gives a comprehensive introduction to the Multi-connected air heaters, and puts forward the evaluation method of the actual operation of energy saving effect. This method can effectively evaluate the energy saving effect of the Multi-connected air heaters blower in practice.

Key words: Multi-connected air heaters, Energy saving, Standard interpretation