pioneer heater bypass valve

The factory heater is very expensive, especially if the dealer installs it for about a day's labor. I found a 3-speed marine heater for about $220 from Summit Racing and ordered a coolant bypass from Ice Crusher to provide low-engine RPM heat. I did not run the heater ducts to the windshield...

I just ordered the Inferno heater from UTVHQ. My understanding is that it does not come with a shutoff valve for the coolant supply line. Should I get and install a valve for the summer months? If I don't will my arse get cooked since the heater assembly is under the driver's seat? Will a...