| Term 
 
        | Room Sealed Boilers Location
 |  | Definition 
 
        | Can be installed in any room with little or no restrictions. |  | 
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        | Term 
 
        | Boilers using 3rd Family gases |  | Definition 
 
        | Shall not be installed in basements |  | 
        |  | 
        
        | Term 
 
        | Open Flued boilers and flueless appliances |  | Definition 
 
        | Cannot be installed in shower rooms or bathrooms GS(I&U)R |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | Can be installed in BEDROOMS/BEDSITTING ROOMS. Heat Input is restricted to 14kW gross/12.7kW net AND must have an ASD |  | 
        |  | 
        
        | Term 
 
        | Boilers in under stair cupboards |  | Definition 
 
        | Are limited to 2 storey buildings without lining of cupboard |  | 
        |  | 
        
        | Term 
 
        | Boilers in Airing cupboards |  | Definition 
 
        | criteria Should be portioned
 any open flue should be insulated or double walled
 |  | 
        |  | 
        
        | Term 
 
        | Boilers in toilets and cloakrooms |  | Definition 
 
        | Can be installed ,only when there is no other viable alternative. reqd ventilation must be directly from outside |  | 
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