icu222much
Member
I am looking to replace my rusting gas hot water tank (15 years old) and leaking gas boiler (30 years old), and am trying to determine what the most cost-efficient long-term solution (30+ years) would be (ie - installation fee, maintenance cost, gas bill...).
A bit about my house:
Questions:
A bit about my house:
- 3300 sqft 30 year old detached (5 bed, 5 bath)
- Vancouver, Canada
- ~$13/GJ gas price ($300 per winter month, $60 per summer month)
- 5 zone radiant heat on both floors
- Poly-b pipes
Questions:
- From my research, there are three systems I can use. Are there any other systems/options I have missed?
- Standard efficiency hot water tank & standard efficiency boiler
- High efficiency hot water tank (aka hot water on demand) & high efficiency boiler
- Combi system high efficiency with a storage tank (I was told I would need a water storage tank with a home larger then 3000sqft)
- Is one type of system (standard efficiency, high efficiency, combi system) more reliable then another? I figured the high efficiency and combi systems are more complex, therefore can break more easily.
- Would the maintenance for each system be similar? What should be done to maintain the system, the frequency, and the cost?
- Generally, how long does each type of system last?
- What do you think the gas savings would be with each type of system? From what I understand, a standard efficiency system is roughly 80% efficient, where-as a high efficiency would be around 95%. In that case, would I be saving just 15% on my gas bill if I purchase a high efficiency system?
- I have a few installers coming next week. Are there any specific questions I should ask them?
