Thanks,
She is 4.5 yrs, 36 lbs and has outgrown a intera 4 in 1 (Dorel) and a Prospect Highback (dorel), both of which reach their limit at 40 lbs. I have a costco traveller that only starts at 40 lbs (30 according to some websites).
Hello,
Now that you've been 'brought over'
to Canada, let's get some legal answers for you...
Your daughter needs to be in a 5 point harness until she is at least 40lbs. All provinces require this.
If she has outgrown her current seat by seated height (shoulders level with the top harness slots of her seat), but is not yet 40lbs she will need a new harnessed seat with taller top harness slots, and by default a higher harnessing limit.
Seats to look at are the Britax Frontier XT and the Graco Nautilus. If those are out of your price range there are other harnessed seats with nice tall top slots we can also recommend, though they may not convert to a booster for down the road. Keep in mind the FrontierXT and Nautilus both convert to excellent booster seats, so the bit extra you spend up front buys you 2 great seats in the end (awesome long use harnessed seat, awesome belt positioning booster).
Does that help?