Honeywell Home BDR91A1000 evohome Wireless Relay Box, White

I purchased an EvoHome starter kit and an additional 4-pack of radiator valves to work with a Baxi 105e Combi Boiler. Having set up the system I realised that the existing 'dumb' thermostat meant that this needed to be set high enough so that if an individual zone was cold on the EvoHome controller then it could open the valve and the boiler would supply heat to that zone. The problem being that the boiler is on more often because it can only control the heat of the water in the pipes and when this drops it will heat back to the set boiler temperature. The answer to this problem is this device. When all zones are heated the relay is switched off and so is your boiler. When one zone drops below your EvoHome controller set temperature that device tells the wireless relay to switch the boiler on, the valve is opened, it heats then when at the desired temperature the radiator valve shuts off and the wireless relay turns off the boiler. I don't know how much more efficient this is quantitatively but common sense says it quite a bit. Being able to control individual rooms is amazing if like I imagine all people have the problem of home to set a thermostat so that the upstairs isn't roasting when you go to bed and downstairs still has a chill in the air.

Works well

I cannot comment on this as in was not compatible for us so to we had unfortunately return it

Delivered on time Returned as fault was not due to this product

Works fine

Perfect on time delivery and exactly what I needed

Failed after 3 months

Bought this for a pensioner as delivery looked quick. As it happens from time of ordering to putting it into service less than 24 hrs. Good going amazon.

Très bien

Remplacement effectué sans problème. Dépannage effectué. Fonctionne parfaitement.

Geleverd volgens afspraak. Netjes en snel. Alleen jammer dat het nu nog voordeliger is.. Maar dat doen ze goed natuurlijk.

Este relé por radio frecuencia permite activar y desactivar la caldera, a demanda del sistema de control de honeywell, que permite abrir y cerrar las válvulas de los radiadores gracias a sus termostatos que también son inteligentes y funcionan por radio frecuencia. El relé se configura por la señal de termostato de 24V de la caldera, algo bastante standard. Cuando el sistema tiene que activar la calefacción se comunica con el relé y el circuito se dispara, activando la caldera. Y la inversa con el proceso contrario. Funciona perfectamente. Me ha parecido caro, pero el resultado es bueno.

Wiring schemes are really complicated. I just hooked the 220V lines on the input ports ant the 2 wires from the boiler on A and B and it works perfectly. So if the complicated schemed scare you: it basically needs 2 wires for power, and 2 wires to turn on and off the boiler. Pairing with the evohome tablet worked as expected.