Hey,
First a bit of background. I own a new, well-insulated house, about 150m2. There is underfloor heating everywhere (partner + upstairs). I have a gas boiler, rather 'higher end' (Vaillant Ecotec Exclusive + water cylinder). I also have a photovoltaic installation (9.81 kW). Due to a huge oversupply last year, I invested in a solution that worked great over the winter. A custom-made hydraulic coupling with two 3.5kW heaters, which is plugged in between the gas boiler and the pumps (below photo). As a result, for 4 winter months the whole house was heated by these two heaters, after which time the surplus ran out. Comparing to the price of the heat pumps, the money I spent on about 1200PLN paid for itself in 2 winter months (no gas bills), and the eventual replacement of the heaters, which will one day die, will be a pittance. Also, I completely don't see the need to spend 20x as much or more on a heat pump;-)
And here's my "problem". Because it is currently a completely non-automated solution. I often had to walk to manually unplug these heaters from the sockets. Even when they were set to the minimum (thermostat at 30 degrees, less is not possible) it was still too warm in the house 90% of the time. I don't need to have 25 degrees in the house in winter;-)
I was thinking of something that would automate the heating a bit more in winter and by the way I would still have a surplus left over for the summer for the heat pump for the pool:-)
I came up with an idea, but I would need to bounce it off someone who is more up to date. Well, I've found a quote for WiFi sockets that, in theory, can calmly withstand that 3500W (the so-called "Tuya Smart 270V PV WIFI socket" - supposedly calmly withstand up to around 4000W and that's how much a heater will never reach). I thought that if I paired it with a WiFi thermometer (also Tuya standard), I could crank out automation of the following type:
- if the temperature drops below 21 degrees, turn on the sockets
- if the temperature is above 23 degrees, turn off the sockets
My questions concern a few issues:
- can this type of socket really withstand that much? I have found many comments that with this kind of power the plastic started to melt
- do I need to buy some kind of Tuya control unit for this solution to link the WiFi sockets and temperature sensor together?
- what temperature difference should I set between switching on and off to make the saving/efficiency as high as possible? (the underfloor has a high inertia)
- maybe you can think of another solution?
Below I upload a photo of the Inox coupling mentioned at the beginning with the heaters.
Greetings
First a bit of background. I own a new, well-insulated house, about 150m2. There is underfloor heating everywhere (partner + upstairs). I have a gas boiler, rather 'higher end' (Vaillant Ecotec Exclusive + water cylinder). I also have a photovoltaic installation (9.81 kW). Due to a huge oversupply last year, I invested in a solution that worked great over the winter. A custom-made hydraulic coupling with two 3.5kW heaters, which is plugged in between the gas boiler and the pumps (below photo). As a result, for 4 winter months the whole house was heated by these two heaters, after which time the surplus ran out. Comparing to the price of the heat pumps, the money I spent on about 1200PLN paid for itself in 2 winter months (no gas bills), and the eventual replacement of the heaters, which will one day die, will be a pittance. Also, I completely don't see the need to spend 20x as much or more on a heat pump;-)
And here's my "problem". Because it is currently a completely non-automated solution. I often had to walk to manually unplug these heaters from the sockets. Even when they were set to the minimum (thermostat at 30 degrees, less is not possible) it was still too warm in the house 90% of the time. I don't need to have 25 degrees in the house in winter;-)
I was thinking of something that would automate the heating a bit more in winter and by the way I would still have a surplus left over for the summer for the heat pump for the pool:-)
I came up with an idea, but I would need to bounce it off someone who is more up to date. Well, I've found a quote for WiFi sockets that, in theory, can calmly withstand that 3500W (the so-called "Tuya Smart 270V PV WIFI socket" - supposedly calmly withstand up to around 4000W and that's how much a heater will never reach). I thought that if I paired it with a WiFi thermometer (also Tuya standard), I could crank out automation of the following type:
- if the temperature drops below 21 degrees, turn on the sockets
- if the temperature is above 23 degrees, turn off the sockets
My questions concern a few issues:
- can this type of socket really withstand that much? I have found many comments that with this kind of power the plastic started to melt

- do I need to buy some kind of Tuya control unit for this solution to link the WiFi sockets and temperature sensor together?
- what temperature difference should I set between switching on and off to make the saving/efficiency as high as possible? (the underfloor has a high inertia)
- maybe you can think of another solution?
Below I upload a photo of the Inox coupling mentioned at the beginning with the heaters.

Greetings