The temperature of the house sparks more arguments during winter than any other subject, according to research.
Thousands of British couples crank up the heating the minute summer comes to an end causing the bickering to start.
Four out of ten couples will have at least two arguments every day about the heating and in two thirds of cases couples will bicker because he is hot while she is cold.
The study of 2,000 homeowners also found the bedroom is the scene of most rows.
Andy Mansfield, of thermostat heating experts Honeywell, said: ''It's amazing something as simple as heating the house could cause so many disputes between couples.
''The results seem to indicate a trend between men and women - men prefer to go easy on the heating and keep things at a lower temperature, while women want to lose the extra layers of clothing and enjoy a toasty house.
''It is a case of finding that balance between getting an agreeable temperature, saving energy and being able to afford the heating bills at the end of a cold spell but fitting a thermostat can certainly help keep heating bills lower and help stop rows.''
More than half of those polled admitted during winter, one of them often finds it difficult to sleep because they are too warm.
One third argue about one person's desire to sleep with the heating on, but the windows wide open.
And a fifth of couples said one of them is adamant the heating shouldn't even be on during the night-time, while 15 per cent claim the bedroom is like a furnace throughout winter.
When not arguing about the heating in the bedroom, more than half of those polled bicker about the heating bill.
A quarter said they can't bear to see the thermostat turned up when it isn't actually cold outside, while 20 per cent row about the heating being on when summer has barely ended.
The study also found one in ten homeowners will turn their heating on as early as August or September.
And while most prefer to keep their house at a reasonable 20 degrees Celsius, 46 per cent do like the house to be warm enough so they can walk around comfortably in a T-shirt.
However, the optimum temperature for keeping the bills down and maximising energy efficiency is 18 degrees.
Andy Mansfield added: ''Eighteen degrees is what we recommend, however we understand some people like it hotter than that at home.
''Eighty-four per cent of domestic energy consumption is used in the generation of heating and hot water and with this latest surge in gas and electricity prices, now is the time for homeowners to look at ways to make savings.''
TOP 10 WINTER ARGUMENTS:
- One person is too hot, one is too cold
- One half of the partnership can't sleep due to the heat
- How much the heating bill will come to
- Wanting different temperatures
- The window is open while the heating is on
- One person wants the heating on so they can sit in a T-shirt
- The outside temperature is actually quite warm
- It is actually too hot to share a bed
- Summer is barely over and the heating is on already
- Heating shouldn't be on at night-time
