Finally got one installed & it is toasty.Posted 8 years ago
The big question is,
leave it on low all the time
turn it on & off as needed.
We’ve been told the former, but I think it will chew up power & waste heat. I don’t have any figures I can work out energy consumption with. Trouble is, the Mrs believes what her mother tells her, who was told by someone at work.
I reckon use when it’s needed.mountaincarrotMember
Running any heating system on all time always uses more energy than allowing the temperature to fluctuate by turning it off. Average temp is lower, so less wasted energy. – Why should there be any question at all?
“I don’t have any figures I can work out energy consumption with.”.. You do have an electricity meter, monitor that for a few weeks.Posted 8 years agoRichie_BSubscriber
If its a ground source pump with minimal buried pipework running it constantly throughout the year is going to give you diminishing returns dropping the soil temperature around the pipework lowering the systems efficiency. The only adjustment, beyond those stated in the manufacturer’s instructions, is that heat pumps work at a lower temperature to gas systems so you need to turn on the system earlier to account for the lag in heating response (depends on what emitters your using though)Posted 8 years agoCraggyjimMember
Most of us will already have air to air heat pumps in the form of a fridge. That switches on and off to maintain a setpoint. I would just use it when you need it to save energy. Is it possible that your mother in law is confusing underfloor heating (commonly driven off heat pump systems)? If that’s the case I would leave it on with a setback temperature increasing the setpoint when you needed a bit more.Posted 8 years agobackhanderMember
Is it a split type AC unit? Mitsubishi or Daikin type thing?Posted 8 years ago
It’s probably an Inverter driven unit and so should only run the compressor at whatever speed it needs to. Never the less, I would only turn it on when required (perhaps operate the timeclock). If you are to maintain it yourself, make sure that you clean the outdoor unit heat exchanger coil.
Craggyjim, I’m afraid you’re wrong refrigerators are cooling only and so are not heat pumps unless they have a reverse cycle defrost. Heat pumps are capable of heating and cooling by reversing the refrigeration cycle.NZColSubscriber
I’ve got a Daikin inverter one and have had it for about 2.5 years now. The guy that installed it said either approach works fine depends on your circumstances like if i had kids etc I would leave it on all the time on a constant temperature> He also said is the house is a wood frame one with as much insulation as you can put in (good roof amount, underfloor expol etc) but single skinned windows the building itself has little thermal memory (?) so you’re just heating the air all the time with very little being retained by the structure so if i whack it on a time than comes on an hour before i get home the house would feel warm. That s been my approach – 5am-6am and 6pm-8pm every day in winter, if I’m in i can override. That lot cost me approx $45 a month extra in power.Posted 8 years ago
The topic ‘Heat pumps’ is closed to new replies.