So, let's address rooftop units first. We have a range of rooftop units that go from two tons to 210 tons. So our two ton threw approximately 210 units, have been very steady, very slight change but nothing material as far as number of units, what has increased has been the larger tonnage units. While those bring equal dollars, so the dollars didn't change much. We went from 113,000,668 down to 112,000,937. So there wasn't much dollar change. Yet, those units were down by 450, 480 units. So the units are larger, more expensive. And I am going to tell you in the 50 to 70 ton range, those units have increased in their market share and their number of units. But at the same time, the midsized units went down for the quarter. So that product mix changed. The units that -- the fifth -- well, really they go from about 40 tons to 70 tons those are a very nice margin units. The units that are above 70 tons are the ones that we've had the lower margin on. However, our price increases have been aggressive on those units. And while there's still lower than the benchmark margin, we've actually improved them a good bit. Now another thing with total number of units going up from 6,258 up to 6,547, you'll notice that we built almost twice as many heat pumps. That’s the new water source heat pumps that we've been talking about. So in 2017, in this same three month period, we built 614 units. In 2018, we built 1,161. And if you look at it on a year-to-date basis, its 3,780 compared to the same nine-month period last year 15. So we have more than doubled our production rate on water source heat pump. We’re seeing the orders coming in at a rate of expansion that supports that growth on a continued basis. Since our AHRI approval, we've seen what we expected that the order rates have increased substantially.