Because the indoor temperature is relatively cold in winter, even though there is heating in the northeast, the actual temperature is only maintained at around 18 degrees Celsius every year (in most old residential areas). This year is colder than usual, and even 18 degrees cannot be maintained. Many days are around 15 degrees, so I bought a small sun heater. Initially, I bought one for my parents online, and I didn't plan to buy one for myself. Then my mom bought one for me offline, and the online purchase arrived later.
Comparison#
Both small sun heaters have two temperature settings. The offline one is 900w, and I don't remember how many watts the online one was (because I returned it later). The offline one outperformed the online one even on the first setting, and the online one looked loose in quality. The only advantage of the online one is the safety feature of automatic power-off when falling. They both cost around 60 yuan offline (after my mom negotiated based on the online price), while the online one was 58 yuan.
Because the online one was not satisfactory, I returned it and bought the same one offline as my mom bought for me, probably from the same store 😄.
Cost Estimate#
Since the first setting is hot enough, I rarely use the second setting. It is labeled as 900w, but I think it should be the power of the second setting. It costs 1 kWh per hour at 1000w, so let's assume 1000w. If it runs for 10 hours a day, the electricity cost should be 0.5 yuan (possibly 0.6), which is 5 yuan a day or 150 yuan a month. It doesn't seem expensive, and this calculation is based on the highest temperature. I usually only use the first setting and rarely use the second.
Discovery#
After using it for half a month, one day I decided to try the second setting, only to find that there was no difference between the first and second settings!!! It seems like they share the same design, and this model may not have different temperature settings.
Actual Electricity Cost#
The actual electricity cost in December 2023 was 135 yuan, which is about 90 yuan more than when I didn't use the small sun heater, confirming my suspicion that it doesn't have different temperature settings as mentioned earlier.
Translated text only.