Hello,
I have received a quote for a radiator that is supposed to heat a 15 m² (160 ft²) room in a fully insulated new building. Since we also have underfloor heating in the house, the installer said it should be operated with a supply temperature of 35°C (95°F). I am unsure if this will work. The manufacturer’s performance data only goes down to 45/35/20. Using their performance calculator (an Excel sheet), which allows you to enter any values, it shows an output of 182 watts, which seems rather low. I will probably have to insist on getting the heating load calculation to verify this.
On one of the manufacturer’s social media accounts, it is also mentioned that: "If your system is to operate with a supply temperature below 40°C (104°F), compact radiators are generally unsuitable because below 40°C natural convection collapses (this applies to all manufacturers)."
Does anyone here have experience operating radiators with such a low supply temperature? Oh, and please no discussions about why a radiator is preferred over underfloor heating; that is not the topic here.
I have received a quote for a radiator that is supposed to heat a 15 m² (160 ft²) room in a fully insulated new building. Since we also have underfloor heating in the house, the installer said it should be operated with a supply temperature of 35°C (95°F). I am unsure if this will work. The manufacturer’s performance data only goes down to 45/35/20. Using their performance calculator (an Excel sheet), which allows you to enter any values, it shows an output of 182 watts, which seems rather low. I will probably have to insist on getting the heating load calculation to verify this.
On one of the manufacturer’s social media accounts, it is also mentioned that: "If your system is to operate with a supply temperature below 40°C (104°F), compact radiators are generally unsuitable because below 40°C natural convection collapses (this applies to all manufacturers)."
Does anyone here have experience operating radiators with such a low supply temperature? Oh, and please no discussions about why a radiator is preferred over underfloor heating; that is not the topic here.
Hi everyone,
I came across this somewhat older topic here.
I’m planning to switch from my gas boiler to a heat pump next year.
Our house is a bit older (built in 1999), timber frame construction, and it doesn’t have underfloor heating.
I was told that a heat pump wouldn’t be cost-effective in this case. That makes sense to me, since heat pumps operate with a supply temperature of 30–35°C (86–95°F).
You’ve recommended Jaga heat pump radiators here.
I’m curious if you’re satisfied with them.
With the same number of radiators operating at 35°C (95°F) supply temperature, can I really warm my entire house?
Regards,
Michael (hausi07)
I came across this somewhat older topic here.
I’m planning to switch from my gas boiler to a heat pump next year.
Our house is a bit older (built in 1999), timber frame construction, and it doesn’t have underfloor heating.
I was told that a heat pump wouldn’t be cost-effective in this case. That makes sense to me, since heat pumps operate with a supply temperature of 30–35°C (86–95°F).
You’ve recommended Jaga heat pump radiators here.
I’m curious if you’re satisfied with them.
With the same number of radiators operating at 35°C (95°F) supply temperature, can I really warm my entire house?
Regards,
Michael (hausi07)
First, try lowering the supply temperature by performing a hydraulic balancing and adjusting the heating curve accordingly. Last winter, at an outdoor temperature of -11°C (12°F), with radiators and a building from the late 1960s, I managed with a supply temperature of 42°C (108°F).
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