A device mounted in the vent connector that closes the vent when the heating unit is not firing. This traps heat inside the heating system and house rather than letting it draft up and out the vent system.
Be the first to post feedback! Click here to post feedback.
Post Feedback:
Login using the form on the top of the page to post feedback if you have registered with ThriftyFun. If you have not yet registered, click here. It's FREE!. If you are not registered you can post feedback as a guest below. Please don't use your email address for your name because spam robots can dredge it from our site. Please do not post your feedback more than ONCE. We need to approve all guest feedback and it may take from minutes to hours for that to happen.
