Very cold air conditioning

both my dad (at age 68) and my uncle (at age 71) died from lung cancer. My brother (age 61) is now fighting with recovering from lung cancer. About 2y6m ago he was diagnosed with stage 3 lung cancer. He has had radiation and chemo and immunotherapy in the interim. The latest 3 cat scans have shown his cancer is in remission. He struggles also with COPD (having been diagnosed about 6y ago)… at present his wife keeps their house central air conditioning set on 60 or 62 degrees. He struggles with catching his breath and shuts around ‘freezing’ most of the time. Might this be detrimental to his overall health? Thank you very much for any info about this.