[Closed] Electric/ Gas Boiler Questions

Hello Chaps

Am thinking of putting in an offer for a small ground floor flat, currently it has no heating. Am trying a few quick replans on paper and am wondering the following:

- At present the property has no gas connection, if I went with an electric water heater can anyone tell me if the heater needs direct venting to the outside, and if so can this vent be ducted horizontally over a distance?

- Are electric water heaters considered cost prohibitive these days?

- For a gas boiler, if situated internally can the vent be ducted horizontally to an outside wall and if so is there a maximum duct length?

Not the most exciting thread today I know!