Vertolot
to be correct and to avoid misunderstandings, the two CAT A procedures are named "Clear Heliport" and "Elevated Heliport".
On "Elevated Heliports" in 1000ft the weight is 2835 up to 28°C.
What is a typical Equipped Empty Weight (EEW) for a 135 in HEMS configuration?
If you talk about a typical configuration, used in the big EC 135 fleets in Germany, Austria, ... the EET is 1820-1880 kg. The weight of the EMS equipment (hardware) is nearly all the same. The differencies in weight between the producers are small. Therefore the EEW of your EC 135 depends more from the a/c weight. Buy air condition, floats, hoist, hooks, .... use old steel oxygen bottles instead of carbon or LOX... and the EEW is more than 2200kg.
The more than 50 EMS EC 135 in Germany and Austria are mostly only VFR day/night single pilot equipped without any other a/c optionals.