Are you switching seasons? Perhaps you're talking more about A/C plans and A/C units and less about heating products and services?
Idea of the month: Featured Product of the Month
Take pictures of the products and units you are selling, enlarge them and post them for all to see.
Add notes on the features and benefits of that product, write them out in 'winning phrases,' so that in a pinch everyone can talk knowledgeably about the product.
Having the visual helps the team focus and work together towards the goal.
Tip: Having trouble getting a big pic of the unit you are selling? Contact the manufacturer, I'm sure they'd love to help!