There are several gas fuelled room-heaters in DEAP Table 4.4 to choose from when selecting the appropriate DEAP default efficiency. The following table gives guidance on identifying these heaters:
Table 4.27 - Identifying gas room heaters
| Appliance | Identifying features |
|---|---|
|
Gas fire, open flue, pre-1980 (open front), and, Gas fire, open flue, 1980 or later (open fronted), sitting proud of, and sealed to, fireplace opening |
The differentiating factor between these two gas fires is their age. If in doubt about the age, choose the more conservative option (pre-1980). "Open flue" means the fire draws its combustion air from the room (as opposed to balanced flue). See Section 2.1 of the DEAP manual to differentiate between an open flue and a chimney. "Open front" means there is no glass front or enclosure separating its flames from the room. It does not have solid fuel effect flames. It would typically have a line of uniform blue flames. Typically, the flue outlet would be part of the heater. |
| Gas fire or wall heater, balanced flue | Balanced flue (or “room sealed”) is defined in Section 2.1 of the DEAP manual: “A room heater is considered to be room sealed if it does not have any air exchange with the room in which it is situated”. Both the air intake and air outlet of this heater are ducted to the external environment. The balanced flue intake and outlet may be in the form of a concentric flue (two pipes centred around a single point). |
| Gas fire, open flue (open fronted), sitting proud of, and sealed to, fireplace opening, with back boiler unit | This is the same as (1) above but has a back boiler. |
| Flush fitting Live Fuel Effect gas fire (open fronted), sealed to fireplace opening, with back boiler unit |
This has flickering solid fuel effect flames rather than uniform blue flames in (1). The flue outlet is likely to be part of the heater. This type of heater has a back boiler. |
| Gas fire, closed front, fan assisted | This unit would usually be glass fronted. It does not have a balanced flue as described in (2). A fan draws air into the unit from the room or is used to send heat out into the room from the unit. |
| Condensing gas fire | This unit is likely to have a back boiler. If it is not clear whether the unit has a condenser or not, check for manufacturers detail or instruction manuals. |
| Flush fitting Live Fuel Effect gas fire (open fronted), sealed to fireplace opening |
This unit has flickering solid fuel effect flames rather than uniform blue flames in (1). The flue outlet is likely to be part of the heater and there is no back boiler. |
| Flush fitting Live Fuel Effect gas fire (open fronted), fan assisted, sealed to fireplace opening |
This has flickering solid fuel effect flames rather than uniform blue flames in (1). The flue outlet is likely to be part of the heater and there is no back boiler. A fan draws air into the unit from the room or is used to send heat out into the room. |
| Decorative Fuel Effect gas fire, open to chimney | This unit has flickering solid fuel effect flames rather than uniform blue lines and is open to the chimney. It would typically sit in the lower part of an existing fireplace, with the original chimney opening over it. The amount of air being drawn up through the chimney will be uncontrolled. |
| Gas fire, flueless | This unit does not have an open flue, chimney, or balanced flue exhaust outlet. In this case there are likely to be 2 permanent vents in the room in which this fire is situated. |