Spartherm have a huge range of built in fires of both conventional cassette types and the more varied styles with 2 or 3 sided glass and many will slide up into a housing (a guillotine door ) as in the samples shown here. There are over 60 types to choose from and bespoke orders are also possible.
The standard range are available in several output sizes and with various options such as heat exchangers, heat storage systems and warm air ducting facilities. These are high quality units with years of design research behind them.
To learn more about Spartherm and their products view this video.