Wanted to re-post cnHeat LOCATE (heat map) pricing. As little as $12.50 per month per site with a three-year subscription. Never a set up fee. Can purchase a one-year subscription, too. Can pay up-front for a discount if you want.
Repeating what Steve Kielley has mentioned. One customer install pays for six cnHeat sites. If a failed truck roll costs $75 or a successful truck roll saves $75 in time and resources due to going to exact install spot, then this pays for six sites of cnHeat for the month.