I WILL HAVE A ZONE IN MY WORK SHOP, WITHIN 10 FT. OF A 20,000 GAL. ABOVE GROUND POOL, PRESENTLY BEING HEATED(NOT VERY WELL) BY A 40 GAL. DOMESTIC ,OIL FIRED HWH. WHATS THE BEST WAY TO GET HEAT TO THAT POOL AND KEEP MY BOILER HAPPY THIS SUMMER. THANKS.