Mine is 36" width at opening, 19 5/8" width at back, 20 1/2" depth to back wall middle measure from bottom, 4" straight back depth before sides angle, 19" depth to back wall measured from top, 15" back wall height before taper, 26 1/4" height at opening, 0" height of hearth extension, 20" depth of hearth
LOVE that Hearthstone Phoenix install @
BruceNorEast, how does it perform? Rear flue doesn't lead to smoke escape?
edit: And I just measured...CANT DO THE PHOENIX either...Bruce's arched firebox left clearance for the stovepipe...I don't have it. This is sooooo aggravating! I hope the OP will have better luck.