fossil fuel controling

[jeffthom]

Ive been installing alot of heat pumps on condensing two stage furnaces. One coustomer wants to run cont. fan but when outdoor stat opens fanswitch on t-stat dosent work and still need to drop fan speed to low for first stage heatdo i haveto add relays to accomplish this or is there an easier way

[karsthuntr]

Use a vision pro t-stat and skip the fossil fuel kit.

[BaldLoonie]

Never heard of such a thing no matter what dual fuel kit you use.