Buying, selling, renting, mortgages, law and tax, written so you can decide when you finish reading
The real benefit is consistency rather than convenience, and the settings matter more than the equipment, because more garden plants here are lost to root rot from too much water than to drought. A rain sensor is the best value item in the system.
Three different dangers needing three devices at three heights. An LPG detector must go low near the floor because the gas is heavier than air, and a smoke alarm should never go in the kitchen, or it will be removed within a fortnight.
The three differ in exactly one respect: how the distant broadcast point sends data back to the router, through the air, down ethernet, or down fibre. Everything else about them follows from that.
UF stops suspended things such as sediment and bacteria. RO also stops dissolved things such as hardness and salinity. Choose from your water's actual problem, and know that the electrode demonstration tells you nothing about water quality.
Cleaning frequency comes from your own output figures, comparing a clear day before and after a wash. Opaque spots matter more than even dust because they create permanently damaging hot spots, and the inverter usually fails before the panels.
A heat pump moves heat out of the air instead of creating it from electricity, so it delivers several times more heat than it uses, and Thailand's warm air is an advantage. But the question to answer first is what your household currently spends on heating water.
Spend in order: prevent the fall, then detect it, then call for help. A fall for an older person rarely ends in a graze, so a few hundred baht of sensor lighting is worth more than a fall-detection watch costing tens of thousands.
A surge is voltage spiking briefly and it destroys electronics. A sag is voltage staying low for a while and it destroys motors, because a motor draws more current to hold its power, the windings run hotter, and the damage accumulates until they burn out. Different problems, different protection.
They cost a few hundred baht and every brand works the same way, so what makes them useful is where you put them. The five that earn their keep are under the kitchen sink, under the basin, behind the washing machine, near the water heater or pump, and near the air conditioner indoor unit.
The 99 percent on the sign usually means infrared or ultraviolet rejection, which is only part of the energy arriving through the glass. Ask for total solar energy rejection, which counts the heat the glass absorbs and re-radiates inward. And however good the film, external shading always beats it.
Most houses do not, and the reason people think they do is usually wrong. Three phase is not stronger and will not make the air conditioning colder: sockets deliver the same voltage. What it gives is more total load capacity. Before converting, try a larger single phase meter.
Breakers trip on overcurrent and short circuit, which protects the cable from overheating rather than protecting people. What protects people is a residual current device, comparing outgoing with returning current. Many houses in Thailand have breakers on every circuit and no residual current protection at all.
