!-- 

function Gas_heat()
	{
		hx70 = 70;
		mx125 = 125;
		mx150 = 150;
		mx200 = 200;
		mx250 = 250;
		mx300 = 300;
		mx400 = 400;
		mx500 = 500;
		a = 0;
		aaa = eval(document.gas_heat.litres.value)*0.00494*22;
		aa = Math.round(aaa*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.twentytwo.value = aa;

	if (aa <= hx70)	{
				document.gas_heat.twentytwo_rec.value = "HX 70";
					} else {
	if (aa <= mx125)	{
				document.gas_heat.twentytwo_rec.value = "MX 125";
					} else {
	if (aa <= mx150)	{
				document.gas_heat.twentytwo_rec.value = "MX 150";
					} else {
	if (aa <= mx200)	{
				document.gas_heat.twentytwo_rec.value = "MX 200";
					} else {
	if (aa <= mx250)	{
				document.gas_heat.twentytwo_rec.value = "MX 250";
					} else {
	if (aa <= mx300)	{
				document.gas_heat.twentytwo_rec.value = "MX 300";
					} else {
	if (aa <= mx400)	{
				document.gas_heat.twentytwo_rec.value = "MX 400";
					} else {
	if (aa <= mx500)	{
				document.gas_heat.twentytwo_rec.value = "MX 500";
					} else {
	if (aa > mx500) {
				document.gas_heat.twentytwo_rec.value = "Call Us";
					}
       }
      }
     }
    }
   }
  }
 }
}		

		bbb = eval(document.gas_heat.litres.value)*0.00494*18;
		bb = Math.round(bbb*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.eighteen.value = bb;

	if (bb <= hx70)	{
				document.gas_heat.eighteen_rec.value = "HX 70";
					} else {
	if (bb <= mx125)	{
				document.gas_heat.eighteen_rec.value = "MX 125";
					} else {
	if (bb <= mx150)	{
				document.gas_heat.eighteen_rec.value = "MX 150";
					} else {
	if (bb <= mx200)	{
				document.gas_heat.eighteen_rec.value = "MX 200";
					} else {
	if (bb <= mx250)	{
				document.gas_heat.eighteen_rec.value = "MX 250";
					} else {
	if (bb <= mx300)	{
				document.gas_heat.eighteen_rec.value = "MX 300";
					} else {
	if (bb <= mx400)	{
				document.gas_heat.eighteen_rec.value = "MX 400";
					} else {
	if (bb <= mx500)	{
				document.gas_heat.eighteen_rec.value = "MX 500";
					} else {
	if (bb > mx500) {
				document.gas_heat.eighteen_rec.value = "Call Us";
					}
       }
      }
     }
    }
   }
  }
 }
}

		ccc = eval(document.gas_heat.litres.value)*0.00494*15;
		cc = Math.round(ccc*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.fifteen.value = cc;

	if (cc <= hx70)	{
				document.gas_heat.fifteen_rec.value = "HX 70";
					} else {
	if (cc <= mx125)	{
				document.gas_heat.fifteen_rec.value = "MX 125";
					} else {
	if (cc <= mx150)	{
				document.gas_heat.fifteen_rec.value = "MX 150";
					} else {
	if (cc <= mx200)	{
				document.gas_heat.fifteen_rec.value = "MX 200";
					} else {
	if (cc <= mx250)	{
				document.gas_heat.fifteen_rec.value = "MX 250";
					} else {
	if (cc <= mx300)	{
				document.gas_heat.fifteen_rec.value = "MX 300";
					} else {
	if (cc <= mx400)	{
				document.gas_heat.fifteen_rec.value = "MX 400";
					} else {
	if (cc <= mx500)	{
				document.gas_heat.fifteen_rec.value = "MX 500";
					} else {
	if (cc > mx500) {
				document.gas_heat.fifteen_rec.value = "Call Us";
					}
       }
      }
     }
    }
   }
  }
 }
}


		ddd = eval(document.gas_heat.litres.value)*0.00494*10;
		dd = Math.round(ddd*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.ten.value = dd;

	if (dd <= hx70)	{
				document.gas_heat.ten_rec.value = "HX 70";
					} else {
	if (dd <= mx125)	{
				document.gas_heat.ten_rec.value = "MX 125";
					} else {
	if (dd <= mx150)	{
				document.gas_heat.ten_rec.value = "MX 150";
					} else {
	if (dd <= mx200)	{
				document.gas_heat.ten_rec.value = "MX 200";
					} else {
	if (dd <= mx250)	{
				document.gas_heat.ten_rec.value = "MX 250";
					} else {
	if (dd <= mx300)	{
				document.gas_heat.ten_rec.value = "MX 300";
					} else {
	if (dd <= mx400)	{
				document.gas_heat.ten_rec.value = "MX 400";
					} else {
	if (dd <= mx500)	{
				document.gas_heat.ten_rec.value = "MX 500";
					} else {
	if (dd > mx500) {
				document.gas_heat.ten_rec.value = "Call Us";
					}
       }
      }
     }
    }
   }
  }
 }
}


		eee = eval(document.gas_heat.litres.value)*0.00494*5;
		ee = Math.round(eee*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.five.value = ee;

	if (ee <= hx70)	{
				document.gas_heat.five_rec.value = "HX 70";
					} else {
	if (ee <= mx125)	{
				document.gas_heat.five_rec.value = "MX 125";
					} else {
	if (ee <= mx150)	{
				document.gas_heat.five_rec.value = "MX 150";
					} else {
	if (ee <= mx200)	{
				document.gas_heat.five_rec.value = "MX 200";
					} else {
	if (ee <= mx250)	{
				document.gas_heat.five_rec.value = "MX 250";
					} else {
	if (ee <= mx300)	{
				document.gas_heat.five_rec.value = "MX 300";
					} else {
	if (ee <= mx400)	{
				document.gas_heat.five_rec.value = "MX 400";
					} else {
	if (ee <= mx500)	{
				document.gas_heat.five_rec.value = "MX 500";
					} else {
	if (ee > mx500) {
				document.gas_heat.five_rec.value = "Call Us";
					}
       }
      }
     }
    }
   }
  }
 }
}

		fff = aaa*0.2777778*0.8;
		ff = Math.round(fff*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.twentytwo2.value = ff;

		ggg = bbb*0.2777778*0.8;
		gg = Math.round(ggg*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.eighteen2.value = gg;

		hhh = ccc*0.2777778*0.8;
		hh = Math.round(hhh*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.fifteen2.value = hh;

		iii = ddd*0.2777778*0.8;
		ii = Math.round(iii*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.ten2.value = ii;

		jjj = eee*0.2777778*0.8;
		jj = Math.round(jjj*Math.pow(10,a))/Math.pow(10,a);
		document.gas_heat.five2.value = jj;
}

// -->

<!-- 

function Pool_surface()
	{
		hx70 = 70;
		mx125 = 125;
		mx150 = 150;
		mx200 = 200;
		mx250 = 250;
		mx300 = 300;
		mx400 = 400;
		mx500 = 500;
		a = 0;
		aaa = eval(document.pool_surface.area.value)*0.33*10;
		aa = Math.round(aaa*Math.pow(10,a))/Math.pow(10,a);
		document.pool_surface.slow.value = aa;

	if (aa <= hx70)	{
				document.pool_surface.slow_rec.value = "HX 70";
					} else {
	if (aa <= mx125)	{
				document.pool_surface.slow_rec.value = "MX 125";
					} else {
	if (aa <= mx150)	{
				document.pool_surface.slow_rec.value = "MX 150";
					} else {
	if (aa <= mx200)	{
				document.pool_surface.slow_rec.value = "MX 200";
					} else {
	if (aa <= mx250)	{
				document.pool_surface.slow_rec.value = "MX 250";
					} else {
	if (aa <= mx300)	{
				document.pool_surface.slow_rec.value = "MX 300";
					} else {
	if (aa <= mx400)	{
				document.pool_surface.slow_rec.value = "MX 400";
					} else {
	if (aa <= mx500)	{
				document.pool_surface.slow_rec.value = "MX 500";
					} else {
	if (aa > mx500) {
				document.pool_surface.slow_rec.value = "Call Us";
					}
       }
      }
     }
    }
   }
  }
 }
}

		bbb = eval(document.pool_surface.area.value)*0.33*13;
		bb = Math.round(bbb*Math.pow(10,a))/Math.pow(10,a);
		document.pool_surface.standard.value = bb;

	if (bb <= hx70)	{
				document.pool_surface.standard_rec.value = "HX 70";
					} else {
	if (bb <= mx125)	{
				document.pool_surface.standard_rec.value = "MX 125";
					} else {
	if (bb <= mx150)	{
				document.pool_surface.standard_rec.value = "MX 150";
					} else {
	if (bb <= mx200)	{
				document.pool_surface.standard_rec.value = "MX 200";
					} else {
	if (bb <= mx250)	{
				document.pool_surface.standard_rec.value = "MX 250";
					} else {
	if (bb <= mx300)	{
				document.pool_surface.standard_rec.value = "MX 300";
					} else {
	if (bb <= mx400)	{
				document.pool_surface.standard_rec.value = "MX 400";
					} else {
	if (bb <= mx500)	{
				document.pool_surface.standard_rec.value = "MX 500";
					} else {
	if (bb > mx500) {
				document.pool_surface.standard_rec.value = "Call Us";
					}
       }
      }
     }
    }
   }
  }
 }
}

		ccc = eval(document.pool_surface.area.value)*0.33*18;
		cc = Math.round(ccc*Math.pow(10,a))/Math.pow(10,a);
		document.pool_surface.rapid.value = cc;

	if (cc <= hx70)	{
				document.pool_surface.rapid_rec.value = "HX 70";
					} else {
	if (cc <= mx125)	{
				document.pool_surface.rapid_rec.value = "MX 125";
					} else {
	if (cc <= mx150)	{
				document.pool_surface.rapid_rec.value = "MX 150";
					} else {
	if (cc <= mx200)	{
				document.pool_surface.rapid_rec.value = "MX 200";
					} else {
	if (cc <= mx250)	{
				document.pool_surface.rapid_rec.value = "MX 250";
					} else {
	if (cc <= mx300)	{
				document.pool_surface.rapid_rec.value = "MX 300";
					} else {
	if (cc <= mx400)	{
				document.pool_surface.rapid_rec.value = "MX 400";
					} else {
	if (cc <= mx500)	{
				document.pool_surface.rapid_rec.value = "MX 500";
					} else {
	if (cc > mx500) {
				document.pool_surface.rapid_rec.value = "Call Us";
					}
       }
      }
     }
    }
   }
  }
 }
}

		ddd = aaa*0.2777778*0.8;
		dd = Math.round(ddd*Math.pow(10,a))/Math.pow(10,a);
		document.pool_surface.slow2.value = dd;

		eee = bbb*0.2777778*0.8;
		ee = Math.round(eee*Math.pow(10,a))/Math.pow(10,a);
		document.pool_surface.standard2.value = ee;

		fff = ccc*0.2777778*0.8;
		ff = Math.round(fff*Math.pow(10,a))/Math.pow(10,a);
		document.pool_surface.rapid2.value = ff;
}

// -->

<!-- 

function Pool_spa()
	{
		a = 0;
		aaa = eval(document.pool_spa.litres.value)*0.00495*eval(document.pool_spa.degrees.value);
		aa = Math.round(aaa*Math.pow(10,a))/Math.pow(10,a);
		document.pool_spa.joules.value = aa;

		bbb = eval(document.pool_spa.joules.value)*0.8/3.6;
		bb = Math.round(bbb*Math.pow(10,a))/Math.pow(10,a);
		document.pool_spa.watts.value = bb;
}

// -->