Hi, Mike! I haven't seen you in probably 10 years, and you look today like you did then- you've got some good genes. I miss Holmes on Homes, that was such a great show. You are one of the guys that taught me about integrity- something I've carried with me through running my own business for awhile, and in my personal life... Thank you!
Bosch Heat Pump Commerical. Heat pumps cost more than NatGas Condensing boilers to operate. A lot of Cool temp heat pumps either reduce heat flow (ie btu\hr) at low temps. or use an electric resistive heating element (very inefficient). Another issue with heat pump is cold weather is the buildup of ice on the coils causing the to freeze up. To address this problem, the heat pump is operated in reverse, dumping heat into the coils to melt the frost off, but this costs you money as your basically heating the outdoors in winter. Note Heat Pump companies are trying to dump there old R410A systems which is banned on Jan 1 2025. Unless it R-454B. Note that R-32 is banned in the EU & will probably get banned in North America in a few years. The other option in R-290 (propane) but is flammable & has a risk of causing a fire. Also note the cost of R454B is about twice the cost of R410 at about $25/lb for R454B. if you need a new system make sure it R454B (or R-32 but R-32 may be phased out in a couple of years). Don't get stuck with a unit that you cannot get replacement refrigerant in the future!
Junk, I’ve been in the phoenix valley when it got cold, that goodness for electric baseboard heat. The good old heat pump couldn’t keep up so imagine in the north and running a compressor 24/7 to get a small amount of heat. No drinking from the koolaid for me.
The colder it gets outside the greater the compressor compression ratio required. BTU's transferred is amount of refrigerant mass flow rate which is more difficult to achieve when required compression ratio is higher. For practical design this usually means a compressor capable of higher rpms to get the required mass flow at high compression ratio at cold outside temp. Compressor is doing more work under these conditions so electrical consumption gets greater with CoP of around 2.0 to slightly less. Still better than electric heat strips. At cold outside temps, Mitsubishi Hyper-heat mini-splits' compressors spin up to almost 7000 rpms at very cold outside temps. They sound like a jet engine.
You forgot to address the frost build up (defrosting cycle wasting $$$). Most heat pumps reduce heat output as the temperature falls below freezing, or compensate using heat elements. Heat pumps cost more to operate than condensing boilers. The only good think about heat pumps is they can do both AC & heating which reduces HVAC equipment. Mike is Shilling For Bosch, that needs to dump their inventory of R410A units, since R410 is banned in Jan 2025.
I’d love to switch to a heat pump, but the cost is too high at this point in time, because my house has cast iron radiators. Split units would be cheap to install, but I don’t want to run pipes on the exterior of my house and friends with them complain about the higher electricity bills vs natural gas bills here in the US. Ideally, I’d go with a geo thermal system and replace the cast iron with aluminum radiators, but again these units are too expensive even with US cash incentives. $30k after major discounts vs $15k. The gas boiler is that last thing in my life the uses fossil fuels. I’ve gone green electric for everything else, but I cannot get to 100% green.
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Hi, Mike! I haven't seen you in probably 10 years, and you look today like you did then- you've got some good genes.
I miss Holmes on Homes, that was such a great show.
You are one of the guys that taught me about integrity- something I've carried with me through running my own business for awhile, and in my personal life... Thank you!
Bosch Heat Pump Commerical.
Heat pumps cost more than NatGas Condensing boilers to operate. A lot of Cool temp heat pumps either reduce heat flow (ie btu\hr) at low temps. or use an electric resistive heating element (very inefficient). Another issue with heat pump is cold weather is the buildup of ice on the coils causing the to freeze up. To address this problem, the heat pump is operated in reverse, dumping heat into the coils to melt the frost off, but this costs you money as your basically heating the outdoors in winter.
Note Heat Pump companies are trying to dump there old R410A systems which is banned on Jan 1 2025. Unless it R-454B. Note that R-32 is banned in the EU & will probably get banned in North America in a few years. The other option in R-290 (propane) but is flammable & has a risk of causing a fire. Also note the cost of R454B is about twice the cost of R410 at about $25/lb for R454B.
if you need a new system make sure it R454B (or R-32 but R-32 may be phased out in a couple of years). Don't get stuck with a unit that you cannot get replacement refrigerant in the future!
Why are they banning R-32? I thought that is what everyone was moving to???
Mini splits or central units: What's your opinion?
Junk, I’ve been in the phoenix valley when it got cold, that goodness for electric baseboard heat. The good old heat pump couldn’t keep up so imagine in the north and running a compressor 24/7 to get a small amount of heat.
No drinking from the koolaid for me.
The colder it gets outside the greater the compressor compression ratio required. BTU's transferred is amount of refrigerant mass flow rate which is more difficult to achieve when required compression ratio is higher. For practical design this usually means a compressor capable of higher rpms to get the required mass flow at high compression ratio at cold outside temp.
Compressor is doing more work under these conditions so electrical consumption gets greater with CoP of around 2.0 to slightly less. Still better than electric heat strips.
At cold outside temps, Mitsubishi Hyper-heat mini-splits' compressors spin up to almost 7000 rpms at very cold outside temps. They sound like a jet engine.
You forgot to address the frost build up (defrosting cycle wasting $$$). Most heat pumps reduce heat output as the temperature falls below freezing, or compensate using heat elements. Heat pumps cost more to operate than condensing boilers. The only good think about heat pumps is they can do both AC & heating which reduces HVAC equipment.
Mike is Shilling For Bosch, that needs to dump their inventory of R410A units, since R410 is banned in Jan 2025.
I’d love to switch to a heat pump, but the cost is too high at this point in time, because my house has cast iron radiators. Split units would be cheap to install, but I don’t want to run pipes on the exterior of my house and friends with them complain about the higher electricity bills vs natural gas bills here in the US.
Ideally, I’d go with a geo thermal system and replace the cast iron with aluminum radiators, but again these units are too expensive even with US cash incentives. $30k after major discounts vs $15k.
The gas boiler is that last thing in my life the uses fossil fuels. I’ve gone green electric for everything else, but I cannot get to 100% green.