Two days ago, overnight temperature here, was 7 degrees! I heat my 3200 sq. ft. home with two unvented NG log sets with blower motors. Both gas logs were set to maximum setting on Low.
Home temperature was set to 69 degrees and the Central unit would occasionally come on and run for about an hour before cutting off. Temperature would not change, but evidently the Central unit produced some heat or it wouldn't have cut off.
I might add that for a home this size, I am surprised that the two unvented gas log sets are able to keep the home at 69 degrees.
I have been told that the efficiency of a HP decreases considerably when outside temperature is below 40 degrees, so when temperature gets to mid 30s, I use the gas logs.
Yes I have CO2 detectors and know the bad things about using unvented gas heat.
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Today's Featured Article - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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