本文发表在 rolia.net 枫下论坛you can check the furnace and thermostat, just open the cover, you can see W1, and W2 terminal , that is 2 stage. for furnace , that means low fire and high fire.
1, filter rack: all central air system should have a filter rack, there are electronic filter, hammock filter, slab silter, eletrosttic filter..., your old furnace should have a filter rack already, you dont need to pay $50 more for rack.
2, 2 stage thermostat is just for commercial, that is comletely wrong, some house have 2 stage thermostat , if they have 2 stage furnace, it can make furnace work in higher efficiency and less noise.
3, 1 stage thermostat damage 2 stage furnace, that is also wrong, furnace can run ok under 1 stage thermoatat. now , mostly 2 stage furnace run automatically from low fire to high fire, even they dont receive 2 stage signal.
4, 2 stage is more expensive than 1 stage thermostat ( can be $100 higher), also 2 stage furnace cost you $500 more.(because there are 2 heat exchanger inside) , for high efficient furnace , it cost you more, because it need BAS vent, they can not vent to chimney.
thx更多精彩文章及讨论,请光临枫下论坛 rolia.net
1, filter rack: all central air system should have a filter rack, there are electronic filter, hammock filter, slab silter, eletrosttic filter..., your old furnace should have a filter rack already, you dont need to pay $50 more for rack.
2, 2 stage thermostat is just for commercial, that is comletely wrong, some house have 2 stage thermostat , if they have 2 stage furnace, it can make furnace work in higher efficiency and less noise.
3, 1 stage thermostat damage 2 stage furnace, that is also wrong, furnace can run ok under 1 stage thermoatat. now , mostly 2 stage furnace run automatically from low fire to high fire, even they dont receive 2 stage signal.
4, 2 stage is more expensive than 1 stage thermostat ( can be $100 higher), also 2 stage furnace cost you $500 more.(because there are 2 heat exchanger inside) , for high efficient furnace , it cost you more, because it need BAS vent, they can not vent to chimney.
thx更多精彩文章及讨论,请光临枫下论坛 rolia.net