The Euro Lite P fluid I use in conjunction with a Euro Lite N-10 fogger, ie the smallest representative ... The fog is dense and relatively long-lasting (after about 10 minutes. You need nachgenebelt for 10 sec.) The room is 40 square meters and with nachgenebelt, when manweiter as has 5m of sight ...
The 5l canister will probably reach long. The fluid keeps in dark and cool place for several years (on request at Euro Lite ....) That's why I always recommend to buy the 5l canister. There are more fluid for the money.