Is 35,000 btu pellet stove enough to heat 1650 sq in raised ranch

I'm looking to possible purchase the st. croix pellet stove which is 35,000 btu. Is this enough for 1650sq ft, without it constantly running on high? I have replacement windows and just purchased insulated window treatments for upstairs. The pellet stove will be in downstairs family room. Downtairs is about 550 sq ft and upstairs is 1100 sq ft. I also have a heated garage but I keep it at about 45 to 50 degrees (500 sq feet)

No You will be running it on high most of the time

I disagree. It depends on your layout and insulation.
I have that stove and it is heating about 1700 sq feet (100% zero oil).
I do have to use 2 CPU fans and a floor fan to evenly distribute the heat.

I almost never run the stove on 5. Most of the time it is on 2 or 3. When it gets in the low teens I have to kick it up to 4. When it is around zero or in the single digits with a lot of wind I do have to run it on 5.

The Hastings is a very efficient stove and throws a lot of heat.

my house is smaller than that but a 38Kbtu unit heats my home easily , to be honest the 35Kbtu unit is pushing that much heat only on high and if you are decently insulated or better it will probably run you out at that range. my unit heats my house running about 2.5lbs/hr to 3 lbs/hr if its really cold, that translates to about 1/2 the units capacity or just a bit more than that so figure about 20Kbtu. as BG stated though " milage may vary" based on factors such as degree of insulation , climate, and floor plan and siting of the unit. i would say that a unit that size would heat that space in most cases but in some cases much easier than others. would need more info about the dwelling to accurately answer that question