2 Words to use with heaters

Don't let the exhaust nozzle lime up, and don't allow lime to collect where the water enters the boiler, or you may split a heater pipe or knock the top off of a check valve.

At the dispersion of the Museum, the hauberk was purchased by Bullock, of Liverpool (afterwards of the Egyptian Hall), in whose catalogue for 1808 it appears as a standing figure, holding a brown bill in the right hand, and resting the left upon a heater shield.

2 Words to use with  heaters