I am looking to replace an older inefficient hot water boiler (200,000 BTUs) that is used to heat a small apartment (3000 sq ft) that I own.
I am evaluating a number of options and would like the advice of the experts here.
1. straight boiler replacement - seems like the least complicated option. I have had estimates in the 11K range.
2. Convert to forced air furnace - cost estimates are around the 10K range. Seems like too much work due to concrete walls, etc.
3. Is the use of high capacity tankless water heaters an option? These seem to be the most cost efficient but I have read contradictory things as to whether tankless water heaters can replace boilers (lower water temp, more oxygenated water could lead to rusting in the baseboardheaters).
Thoughts on the third option? is it an option?