The extensive Dunham-Bush range of Series AM and Series BM units are all available in the Avant-garde variant. The only difference is the position of the flow and return connections due to integration of the motorized valve.

Traditional low-pressure hot water (LPHW) heating systems operate at 82 °C flow and 71 °C return during peak loads on both compensated (radiators etc) and constant temperature systems (fan convectors etc). The Dunham-Bush Avant-garde unit is designed to operates at 55 °C flow and 35 °C return during peak loads, whilst maintaining the same duty, options and features as the Dunham–Bush range of Series AM and Series BM fan convector heaters.
 

• Boiler return temperature is always below 55 °C ensuring the boiler is in condensing mode at all times.
• Increased differential water temperatures across the coil, reduces pumping energy by up to 87%.
• Decreased flow and return temperatures reduce standing losses from pipe work.
• Low water content and thermal mass of unit allows rapid response preventing a protracted warm-up period and temperature overshoot.
• Integral 4-port valve prevents wasteful natural convection during mild conditions (2-port valve option available upon request).
• Optional brushless DC motor reduces electrical power consumption by up to 80% compared to standard motors.

The full range of controls offered in the Series AM and BM range of fan convector heaters are available in the Avant-garde variants. Simple arrangements include On/off thermostats and high/low thermostats. These thermostats can be sited internally in some models and remote thermostats are available with all models or a combination of both. In addition, adjustable low temperature cut-out (LTC) thermostats can be fitted to inhibit the unit if the boiler plant is not operating. Internally and externally unit mounted switches and remote switches are available when specified. Typical switching functions include on/off control, hand/auto, high/low speed, low ambient selection and time control functions.

Other thermostats, controllers and switches are available upon request.
 

The full range of accessories available in the Dunham-Bush Series AM and Series BM fan convector heater are also available in the Avant-garde range. Refer to relevant Series AM and Series BM fan convector heater brochures for full details. Typical accessories include:-

• Air thermostats
• Switches
• Low temperature cut-out thermostats
• Electronic speed control
• PI control
• 2-Port control valves (4-port standard)
• Fitted Isolation valves
• Fresh air inlet dampers (motorized or hand operated)
• Automatic air vents
• Remote grilles and fixing frames
• Plinths

Series AM

• 22 standard Models in 7 sizes
• Extensive range models
• Pencil proof grilles
• Special colour finishes

• 8 Models in 9 sizes
• Inlet and discharge boxes
• Extension ducts
• Multiple spigot inlet and outlet