I mentioned to the installers of the new unit that I'd had a quote from another company to install a similar system for a cost 50% higher than their quote. The unit installed is rated at 3.5 kW, the team leader said for that kind of outlay he could supply and install an 8kW heat pump. In fact, the cost of this new unit was less than $300 more than the original installation done in February 2014.